2024年8月14日发(作者：仆凌春)

FP6185-18S5

FP6185-28S5

FP6185-33S5

FP6715授权一级代理商

FP6185

/product/

300mA, Low Noise High PSRR

LDO Regulator

Features



























Description

The FP6185 is a low dropout, low noise, high PSRR,

very low quiescent current positive linear regulator.

The FP6185 can supply 300mA output current with

low dropout voltage at about 400mV that optimized

for battery-powered systems or portable wireless

devices such as mobile phones. The shutdown

function can provide remote control for the external

signal to decide the on/off state of FP6185 that

consumes less than 0.1µA during shutdown mode.

The FP6185 regulator is able to operate with output

capacitors as small as 1µF for stability. Other than

the current limit protection, FP6185 also offers the

on chip thermal shutdown feature providing

protection against overload or any condition when

the ambient temperature exceeds the maximum

junction temperature.

The FP6185 offers high precision output voltage of

2%.The FP6185 is available in SOT-23-5 package

which features small size.

Low V

IN

and Wide V

IN

Range: 2V to 5.5V

Output Current 300mA

*1

2% Output Voltage Accuracy

Output Noise 65μVrms from 10Hz to 100kHz

V

OUT

Fixed 1.0V to 3.3V

Low Dropout Voltage of 400mV at 300mA

Ripple Rejection 75dB at 1KHz

Very Low Quiescent Current at 35µA

Needs Only 1µF Capacitor for Stability

Thermal Shutdown Protection

Current Limit Protection

SOT-23-5 Package

RoHS Compliant

*

1.

Attention should be paid to the power dissipation

of the package when the output current is large.

Applications









PDAs, Mobile phones, GPS, Smartphones

Wireless Handsets, Wireless LAN, Bluetooth®,

Zigbee®

Portable Medical Equipment

Other Battery Powered Applications

Typical Application Circuit

V

IN

C

IN

1

µF

VINVOUT

C

OUT

1

µF

V

OUT

GND

FP6185

V

SHDN

SHDNNC

Figure 2. Typical Application Circuit of FP6185

Note: To prevent oscillation, it is recommended to use minimum 1µF X7R or X5R dielectric capacitors if ceramics are used as input/output

capacitors.

FP6185-Preliminary 0.3-JUN-2017

1

FP6185

Pin Assignment

S5 Package (SOT-23-5)

VOUTNC

Ordering Information

FP6185-

□□

Package Type

S5: SOT-23-5

Output Voltage

11: 1.1V 12: 1.2V

15: 1.5V 18: 1.8V

25: 2.5V 27: 2.7V

28: 2.8V 29: 2.9V

30: 3.0V 33: 3.3V

Marking Information

54

(Marking)

123

VINGND

SHDN

Figure 1. Pin Assignment of FP6185

Part Number

FP6185-11S5

FP6185-12S5

FP6185-15S5

FP6185-18S5

FP6185-25S5

FP6185-27S5

FP6185-28S5

FP6185-29S5

FP6185-30S5

Product Code

FU4

FD8

FD9

FE1

FU5

FU6

FE3

FE2

FU7

FP6185-33S5 FE4

Note: Please consult Fitipower sales office or authorized

distributors for availability of special output voltages.

FP6185-Preliminary 0.3-JUN-2017

2

FP6185

Pin Function

Functional Pin Description

Pin Name

VIN

GND

NC

VOUT

Pin No.

1

2

3

4

5

Power is supplied to this device from this pin which is required an input filter capacitor. In general, the

input capacitor in the range of 1µF to 10µF is sufficient.

Common ground pin.

Pull this pin high to enable IC, pull this pin low to shutdown IC. Floating this pin will be shutdown due to

the built-in pull-low resistor.

No connection.

The FP6185 is stable with an output capacitor 1µF or greater. The larger output capacitor will be

required for application with larger load transients. The large output capacitor could reduce output

noise, improve stability and PSRR.

Block Diagram

VIN

RSEN

PMOS

VOUT

Current

Limit

Error

Amp

+

R1

SHDN

Power

Shutdown

5MΩ

_

Thermal

Shutdown

Vref

R2

GND

Figure 3. Block Diagram of FP6185

FP6185-Preliminary 0.3-JUN-2017

3

FP6185

Absolute Maximum Ratings

(Note 1)

● Supply Voltage V

IN

---------------------------------------------------------------------------------------- -0.3V to +6.5V

● EN Voltage V

EN

-------------------------------------------------------------------------------------------- -0.3V to V

IN

+0.3V

● Power Dissipation @ T

A

=25°C & T

J

=125°C (P

D

)

● Package Thermal Resistance (θ

JA

)

SOT-23-5 ---------------------------------------------------------------------------------------- 0.4W

(Note 2)

SOT-23-5 ---------------------------------------------------------------------------------------- 250°C/W

● Package Thermal Resistance (θ

JC

)

SOT-23-5 ---------------------------------------------------------------------------------------- 130°C/W

● Lead Temperature (Soldering, 10sec.) -------------------------------------------------------------- +260°C

● Junction Temperature (T

J

) ------------------------------------------------------------------------------ -40°C to +150°C

● Storage Temperature (T

STG

) ---------------------------------------------------------------------------- -65°C to +150°C

Note 1: Stresses beyond this listed under “Absolute Maximum Ratings" may cause permanent damage to the device.

Note 2: θ

JA

is measured at 25°C ambient with the component mounted on a high effective thermal conductivity 4-layer board of JEDEC-51-7.

The thermal resistance greatly varies with layout, copper thickness, number of layers and PCB size.

Recommended Operating Conditions

● VIN Supply Voltage --------------------------------------------------------------------------------------- +2V to +5.5V

● Output Current (I

OUT

) ------------------------------------------------------------------------------------- 0mA to 300mA

● Operating Temperature Range (T

OPR

) --------------------------------------------------------------- -40°C to +85°C

● Operating Junction Temperature Range (T

J

) ------------------------------------------------------- -40°C to +125°C

FP6185-Preliminary 0.3-JUN-2017

4

FP6185

Electrical Characteristics

(V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified)

Parameter

Input Voltage Range

Current Limit

Quiescent Current

Standby Current

Output Voltage Accuracy

Symbol

V

IN

I

LIMIT

I

Q

I

STBY

V

OUT

R

Load

=1Ω

I

OUT

=0mA

Conditions Min

2

320

-2

Typ

35

0.1

800

600

475

275

250

225

200

1550

950

750

550

500

450

400

1

6

75

65

100

145

25

60

0.3

Max

5.5

1

+2

1200

900

700

400

350

325

300

2300

1400

1100

800

700

650

600

8

30

Unit

V

mA

µA

µA

%

Pin Connected to GND

I

OUT

=1mA

V

OUT

=1.2V

V

OUT

=1.5V

V

OUT

=1.8V

Dropout Voltage

(Note 3)

V

DROP

I

OUT

=150mA V

OUT

=2.5V

V

OUT

=2.7V

V

OUT

=3.0V

V

OUT

=3.3V

V

OUT

=1.2V

V

OUT

=1.5V

V

OUT

=1.8V

mV

Dropout Voltage

(Note 3)

V

DROP

I

OUT

=300mA V

OUT

=2.5V

V

OUT

=2.7V

V

OUT

=3.0V

V

OUT

=3.3V

mV

Line Regulation

Load Regulation

(Note 4)

Ripple Rejection

(Note 5)

V

LINE

V

LOAD

PSRR

V

NOISE

TC

T

SD

T

SD

R

DIS

I

I

OUT

=1mA, V

IN

=V

OUT

+1V to 5V

I

OUT

=0mA to 300mA

V

IN

=V

OUT

+1V

DC

+0.2V

P-P(AC)

,

f

RIPPLE

=1KHz,V

OUT

≧1.8V,

I

OUT

=30mA

C

OUT

=1μF, I

OUT

=0mA

BW=10Hz ~ 100KHz

I

OUT

=1mA, V

IN

=5V

Hysteresis

V

=0V

V

=2.5V

mV

mV

dB

μV

RMS

ppm/ºC

ºC

ºC

Ω

uA

Output Noise Voltage

(Note 5)

Temperature Coefficient

(Note 5)

Thermal Shutdown Threshold

(Note 5)

Output Discharge Resistance

Pin Current

FP6185-Preliminary 0.3-JUN-2017

5

FP6185

Electrical Characteristics (Continued)

(V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified)

Parameter

Pin Threshold

Symbol

V

(

Start-up

V

( FF

Shutdown

Conditions Min

1.0

Typ

Max

0.4

Unit

V

V

Note 3: The dropout voltage is defined as V

IN

-V

OUT

, which is measured when V

OUT

drops 2% of its normal value with the specified output

current.

Note 4: Load regulation and dropout voltage are measured at a constant junction temperature by using a 40ms low duty cycle current

pulse.

Note 5: Guarantee by design.

FP6185-Preliminary 0.3-JUN-2017

6

FP6185

V

OUT

=3.3V, I

OUT

=0mA

Typical Performance Curves

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V, I

OUT

=0mA

V

SHDN

2V/div

V

SHDN

2V/div

V

OUT

2V/div

V

OUT

2V/div

20us/div

Figure 4. Turn ON Waveform

V

OUT

=1.5V, I

OUT

=0mA

80us/div

Figure 5. Turn OFF Waveform

V

OUT

=1.5V, I

OUT

=0mA

V

SHDN

2V/div

V

SHDN

2V/div

V

OUT

1V/div

V

OUT

1V/div

20us/div

Figure 6. Turn ON Waveform

3.3V

OUT

/I

OUT

=1mA300mA1mA

80us/div

Figure 7. Turn OFF Waveform

1.5V

OUT

/I

OUT

=1mA300mA1mA

V

OUT

100mV/div

V

OUT

100mV/div

I

OUT

100mA/div

40us/div

Figure 8. Load Transient Response

I

OUT

100mA/div

40us/div

Figure 9. Load Transient Response

FP6185-Preliminary 0.3-JUN-2017

7

FP6185

V

OUT

=1.5V/10mA, C

IN

=none

Typical Performance Curves (Continued)

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V/10mA, C

IN

=none

V

IN

1V/div

V

IN

1V/div

V

OUT

50mV/div

V

OUT

50mV/div

40us/div

Figure 10. Line Transient Response

I

OUT

=1mA

40us/div

Figure 11. Line Transient Response

I

OUT

=1mA

Figure 12. Output Voltage vs. Input Voltage

V

IN

=5V

Figure 13. Output Voltage vs. Input Voltage

V

IN

=3.3V

Figure 14. Output Voltage vs. Output Current

Figure 15. Output Voltage vs. Output Current

FP6185-Preliminary 0.3-JUN-2017

8

FP6185

V

OUT

=1.5V

Typical Performance Curves (Continued)

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V

Figure 16. Dropout Voltage vs. Output Current

I

OUT

=1mA

Figure 17. Dropout Voltage vs. Output Current

I

OUT

=1mA

Figure 18. Output Voltage vs. Temperature

V

IN

=4.3V, V

OUT

=3.3V

Figure 19. Output Voltage vs. Temperature

V

IN

=2.5V, V

OUT

=1.5V

Figure 20. Quiescent Current vs. Temperature

Figure 21. Quiescent Current vs. Temperature

FP6185-Preliminary 0.3-JUN-2017

9

FP6185

V

OUT

=1.5V, V

SHDN

=0V

Typical Performance Curves (Continued)

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V, V

SHDN

=0V

Figure 22. Shutdown Current vs. Temperature

V

OUT

=3.3V, I

OUT

=0mA

Figure 23. Shutdown Current vs. Temperature

V

OUT

=1.5V, I

OUT

=0mA

V

OUT

50uV/div

V

OUT

50uV/div

10ms/div

Figure 24. Output Noise Voltage

10ms/div

Figure 25. Output Noise Voltage

FP6185-Preliminary 0.3-JUN-2017

10

FP6185

2. Protection Features

In order to prevent overloading or thermal condition

from damaging the device, FP6185 has internal

thermal and current limiting functions designed to

protect the device. It will rapidly shut off PMOS

pass element during over-temperature condition.

3. Thermal Consideration

The power handling capability of the device will be

limited by allowable operation junction temperature

(125ºC). The power dissipated by the device will

be estimated by P

D

=I

OUT

(V

IN

-V

OUT

). The power

dissipation should be lower than the maximum

power dissipation listed in “Absolute Maximum

Ratings” section.

4. Shutdown Operation

The FP6185 is shutdown by pulling the

input low, and turned on by driving the high.

If pin floating, the FP6185 will shut down

because

pin has built-in a pull low resistor

(refer to Block Diagram).

Application Information

The FP6185 is a low dropout linear regulator that

could provide 300mA output current at dropout

voltage about 400mV. Current limit and on chip

thermal shutdown features provide protection

against any combination of overload or ambient

temperature that could exceed maximum junction

temperature.

1. Output and Input Capacitor

The FP6185 regulator is designed to be stable with a

wide range of output capacitors. The ESR of the

output capacitor affects stability. Larger value of the

output capacitor decreases the peak deviations and

improves transient response for larger current

changes.

The capacitor types (aluminum, ceramic, and

tantalum) have different characterizations such as

temperature and voltage coefficients. All ceramic

capacitors are manufactured with a variety of

dielectrics, each with different behavior across

temperature and applications. Common dielectrics

used are X5R, X7R and Y5V. It is recommended to

use 1µF to 10µF X5R or X7R dielectric ceramic

capacitors with 30m to 50m ESR range between

device outputs and ground for stability. The

FP6185 is designed to be stable with low ESR

ceramic capacitors and higher values of capacitors

and ESR could improve output stability. The ESR of

output capacitor is very important because it

generates a zero to provide phase lead for loop

stability.

There are no requirements for the ESR on the input

capacitor, but its voltage and temperature coefficient

have to be considered for device application

environment.

FP6185-Preliminary 0.3-JUN-2017

11

FP6185

SOT-23-5 Package (Unit: mm)

Outline Information

SYMBOLS

UNIT

A

A1

A2

B

D

E

E1

e

e1

L

DIMENSION IN MILLIMETER

MIN MAX

0.90 1.45

0.00

0.90

0.30

2.80

2.60

1.50

0.90

1.80

0.30

0.15

1.30

0.50

3.00

3.00

1.70

1.00

2.00

0.60

Note: Followed From JEDEC MO-178-C.

Carrier Dimensions

Life Support Policy

Fitipower’s products are not authorized for use as critical components in life support devices or other medical systems.

FP6185-Preliminary 0.3-JUN-2017

12

2024年8月14日发(作者：仆凌春)

FP6185-18S5

FP6185-28S5

FP6185-33S5

FP6715授权一级代理商

FP6185

/product/

300mA, Low Noise High PSRR

LDO Regulator

Features



























Description

The FP6185 is a low dropout, low noise, high PSRR,

very low quiescent current positive linear regulator.

The FP6185 can supply 300mA output current with

low dropout voltage at about 400mV that optimized

for battery-powered systems or portable wireless

devices such as mobile phones. The shutdown

function can provide remote control for the external

signal to decide the on/off state of FP6185 that

consumes less than 0.1µA during shutdown mode.

The FP6185 regulator is able to operate with output

capacitors as small as 1µF for stability. Other than

the current limit protection, FP6185 also offers the

on chip thermal shutdown feature providing

protection against overload or any condition when

the ambient temperature exceeds the maximum

junction temperature.

The FP6185 offers high precision output voltage of

2%.The FP6185 is available in SOT-23-5 package

which features small size.

Low V

IN

and Wide V

IN

Range: 2V to 5.5V

Output Current 300mA

*1

2% Output Voltage Accuracy

Output Noise 65μVrms from 10Hz to 100kHz

V

OUT

Fixed 1.0V to 3.3V

Low Dropout Voltage of 400mV at 300mA

Ripple Rejection 75dB at 1KHz

Very Low Quiescent Current at 35µA

Needs Only 1µF Capacitor for Stability

Thermal Shutdown Protection

Current Limit Protection

SOT-23-5 Package

RoHS Compliant

*

1.

Attention should be paid to the power dissipation

of the package when the output current is large.

Applications









PDAs, Mobile phones, GPS, Smartphones

Wireless Handsets, Wireless LAN, Bluetooth®,

Zigbee®

Portable Medical Equipment

Other Battery Powered Applications

Typical Application Circuit

V

IN

C

IN

1

µF

VINVOUT

C

OUT

1

µF

V

OUT

GND

FP6185

V

SHDN

SHDNNC

Figure 2. Typical Application Circuit of FP6185

Note: To prevent oscillation, it is recommended to use minimum 1µF X7R or X5R dielectric capacitors if ceramics are used as input/output

capacitors.

FP6185-Preliminary 0.3-JUN-2017

1

FP6185

Pin Assignment

S5 Package (SOT-23-5)

VOUTNC

Ordering Information

FP6185-

□□

Package Type

S5: SOT-23-5

Output Voltage

11: 1.1V 12: 1.2V

15: 1.5V 18: 1.8V

25: 2.5V 27: 2.7V

28: 2.8V 29: 2.9V

30: 3.0V 33: 3.3V

Marking Information

54

(Marking)

123

VINGND

SHDN

Figure 1. Pin Assignment of FP6185

Part Number

FP6185-11S5

FP6185-12S5

FP6185-15S5

FP6185-18S5

FP6185-25S5

FP6185-27S5

FP6185-28S5

FP6185-29S5

FP6185-30S5

Product Code

FU4

FD8

FD9

FE1

FU5

FU6

FE3

FE2

FU7

FP6185-33S5 FE4

Note: Please consult Fitipower sales office or authorized

distributors for availability of special output voltages.

FP6185-Preliminary 0.3-JUN-2017

2

FP6185

Pin Function

Functional Pin Description

Pin Name

VIN

GND

NC

VOUT

Pin No.

1

2

3

4

5

Power is supplied to this device from this pin which is required an input filter capacitor. In general, the

input capacitor in the range of 1µF to 10µF is sufficient.

Common ground pin.

Pull this pin high to enable IC, pull this pin low to shutdown IC. Floating this pin will be shutdown due to

the built-in pull-low resistor.

No connection.

The FP6185 is stable with an output capacitor 1µF or greater. The larger output capacitor will be

required for application with larger load transients. The large output capacitor could reduce output

noise, improve stability and PSRR.

Block Diagram

VIN

RSEN

PMOS

VOUT

Current

Limit

Error

Amp

+

R1

SHDN

Power

Shutdown

5MΩ

_

Thermal

Shutdown

Vref

R2

GND

Figure 3. Block Diagram of FP6185

FP6185-Preliminary 0.3-JUN-2017

3

FP6185

Absolute Maximum Ratings

(Note 1)

● Supply Voltage V

IN

---------------------------------------------------------------------------------------- -0.3V to +6.5V

● EN Voltage V

EN

-------------------------------------------------------------------------------------------- -0.3V to V

IN

+0.3V

● Power Dissipation @ T

A

=25°C & T

J

=125°C (P

D

)

● Package Thermal Resistance (θ

JA

)

SOT-23-5 ---------------------------------------------------------------------------------------- 0.4W

(Note 2)

SOT-23-5 ---------------------------------------------------------------------------------------- 250°C/W

● Package Thermal Resistance (θ

JC

)

SOT-23-5 ---------------------------------------------------------------------------------------- 130°C/W

● Lead Temperature (Soldering, 10sec.) -------------------------------------------------------------- +260°C

● Junction Temperature (T

J

) ------------------------------------------------------------------------------ -40°C to +150°C

● Storage Temperature (T

STG

) ---------------------------------------------------------------------------- -65°C to +150°C

Note 1: Stresses beyond this listed under “Absolute Maximum Ratings" may cause permanent damage to the device.

Note 2: θ

JA

is measured at 25°C ambient with the component mounted on a high effective thermal conductivity 4-layer board of JEDEC-51-7.

The thermal resistance greatly varies with layout, copper thickness, number of layers and PCB size.

Recommended Operating Conditions

● VIN Supply Voltage --------------------------------------------------------------------------------------- +2V to +5.5V

● Output Current (I

OUT

) ------------------------------------------------------------------------------------- 0mA to 300mA

● Operating Temperature Range (T

OPR

) --------------------------------------------------------------- -40°C to +85°C

● Operating Junction Temperature Range (T

J

) ------------------------------------------------------- -40°C to +125°C

FP6185-Preliminary 0.3-JUN-2017

4

FP6185

Electrical Characteristics

(V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified)

Parameter

Input Voltage Range

Current Limit

Quiescent Current

Standby Current

Output Voltage Accuracy

Symbol

V

IN

I

LIMIT

I

Q

I

STBY

V

OUT

R

Load

=1Ω

I

OUT

=0mA

Conditions Min

2

320

-2

Typ

35

0.1

800

600

475

275

250

225

200

1550

950

750

550

500

450

400

1

6

75

65

100

145

25

60

0.3

Max

5.5

1

+2

1200

900

700

400

350

325

300

2300

1400

1100

800

700

650

600

8

30

Unit

V

mA

µA

µA

%

Pin Connected to GND

I

OUT

=1mA

V

OUT

=1.2V

V

OUT

=1.5V

V

OUT

=1.8V

Dropout Voltage

(Note 3)

V

DROP

I

OUT

=150mA V

OUT

=2.5V

V

OUT

=2.7V

V

OUT

=3.0V

V

OUT

=3.3V

V

OUT

=1.2V

V

OUT

=1.5V

V

OUT

=1.8V

mV

Dropout Voltage

(Note 3)

V

DROP

I

OUT

=300mA V

OUT

=2.5V

V

OUT

=2.7V

V

OUT

=3.0V

V

OUT

=3.3V

mV

Line Regulation

Load Regulation

(Note 4)

Ripple Rejection

(Note 5)

V

LINE

V

LOAD

PSRR

V

NOISE

TC

T

SD

T

SD

R

DIS

I

I

OUT

=1mA, V

IN

=V

OUT

+1V to 5V

I

OUT

=0mA to 300mA

V

IN

=V

OUT

+1V

DC

+0.2V

P-P(AC)

,

f

RIPPLE

=1KHz,V

OUT

≧1.8V,

I

OUT

=30mA

C

OUT

=1μF, I

OUT

=0mA

BW=10Hz ~ 100KHz

I

OUT

=1mA, V

IN

=5V

Hysteresis

V

=0V

V

=2.5V

mV

mV

dB

μV

RMS

ppm/ºC

ºC

ºC

Ω

uA

Output Noise Voltage

(Note 5)

Temperature Coefficient

(Note 5)

Thermal Shutdown Threshold

(Note 5)

Output Discharge Resistance

Pin Current

FP6185-Preliminary 0.3-JUN-2017

5

FP6185

Electrical Characteristics (Continued)

(V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified)

Parameter

Pin Threshold

Symbol

V

(

Start-up

V

( FF

Shutdown

Conditions Min

1.0

Typ

Max

0.4

Unit

V

V

Note 3: The dropout voltage is defined as V

IN

-V

OUT

, which is measured when V

OUT

drops 2% of its normal value with the specified output

current.

Note 4: Load regulation and dropout voltage are measured at a constant junction temperature by using a 40ms low duty cycle current

pulse.

Note 5: Guarantee by design.

FP6185-Preliminary 0.3-JUN-2017

6

FP6185

V

OUT

=3.3V, I

OUT

=0mA

Typical Performance Curves

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V, I

OUT

=0mA

V

SHDN

2V/div

V

SHDN

2V/div

V

OUT

2V/div

V

OUT

2V/div

20us/div

Figure 4. Turn ON Waveform

V

OUT

=1.5V, I

OUT

=0mA

80us/div

Figure 5. Turn OFF Waveform

V

OUT

=1.5V, I

OUT

=0mA

V

SHDN

2V/div

V

SHDN

2V/div

V

OUT

1V/div

V

OUT

1V/div

20us/div

Figure 6. Turn ON Waveform

3.3V

OUT

/I

OUT

=1mA300mA1mA

80us/div

Figure 7. Turn OFF Waveform

1.5V

OUT

/I

OUT

=1mA300mA1mA

V

OUT

100mV/div

V

OUT

100mV/div

I

OUT

100mA/div

40us/div

Figure 8. Load Transient Response

I

OUT

100mA/div

40us/div

Figure 9. Load Transient Response

FP6185-Preliminary 0.3-JUN-2017

7

FP6185

V

OUT

=1.5V/10mA, C

IN

=none

Typical Performance Curves (Continued)

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V/10mA, C

IN

=none

V

IN

1V/div

V

IN

1V/div

V

OUT

50mV/div

V

OUT

50mV/div

40us/div

Figure 10. Line Transient Response

I

OUT

=1mA

40us/div

Figure 11. Line Transient Response

I

OUT

=1mA

Figure 12. Output Voltage vs. Input Voltage

V

IN

=5V

Figure 13. Output Voltage vs. Input Voltage

V

IN

=3.3V

Figure 14. Output Voltage vs. Output Current

Figure 15. Output Voltage vs. Output Current

FP6185-Preliminary 0.3-JUN-2017

8

FP6185

V

OUT

=1.5V

Typical Performance Curves (Continued)

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V

Figure 16. Dropout Voltage vs. Output Current

I

OUT

=1mA

Figure 17. Dropout Voltage vs. Output Current

I

OUT

=1mA

Figure 18. Output Voltage vs. Temperature

V

IN

=4.3V, V

OUT

=3.3V

Figure 19. Output Voltage vs. Temperature

V

IN

=2.5V, V

OUT

=1.5V

Figure 20. Quiescent Current vs. Temperature

Figure 21. Quiescent Current vs. Temperature

FP6185-Preliminary 0.3-JUN-2017

9

FP6185

V

OUT

=1.5V, V

SHDN

=0V

Typical Performance Curves (Continued)

V

IN

=V

OUT

+1V,

pin connected to V

IN

, C

IN

=1µF, C

OUT

=1µF, T

A

=25ºC, unless otherwise specified

V

OUT

=3.3V, V

SHDN

=0V

Figure 22. Shutdown Current vs. Temperature

V

OUT

=3.3V, I

OUT

=0mA

Figure 23. Shutdown Current vs. Temperature

V

OUT

=1.5V, I

OUT

=0mA

V

OUT

50uV/div

V

OUT

50uV/div

10ms/div

Figure 24. Output Noise Voltage

10ms/div

Figure 25. Output Noise Voltage

FP6185-Preliminary 0.3-JUN-2017

10

FP6185

2. Protection Features

In order to prevent overloading or thermal condition

from damaging the device, FP6185 has internal

thermal and current limiting functions designed to

protect the device. It will rapidly shut off PMOS

pass element during over-temperature condition.

3. Thermal Consideration

The power handling capability of the device will be

limited by allowable operation junction temperature

(125ºC). The power dissipated by the device will

be estimated by P

D

=I

OUT

(V

IN

-V

OUT

). The power

dissipation should be lower than the maximum

power dissipation listed in “Absolute Maximum

Ratings” section.

4. Shutdown Operation

The FP6185 is shutdown by pulling the

input low, and turned on by driving the high.

If pin floating, the FP6185 will shut down

because

pin has built-in a pull low resistor

(refer to Block Diagram).

Application Information

The FP6185 is a low dropout linear regulator that

could provide 300mA output current at dropout

voltage about 400mV. Current limit and on chip

thermal shutdown features provide protection

against any combination of overload or ambient

temperature that could exceed maximum junction

temperature.

1. Output and Input Capacitor

The FP6185 regulator is designed to be stable with a

wide range of output capacitors. The ESR of the

output capacitor affects stability. Larger value of the

output capacitor decreases the peak deviations and

improves transient response for larger current

changes.

The capacitor types (aluminum, ceramic, and

tantalum) have different characterizations such as

temperature and voltage coefficients. All ceramic

capacitors are manufactured with a variety of

dielectrics, each with different behavior across

temperature and applications. Common dielectrics

used are X5R, X7R and Y5V. It is recommended to

use 1µF to 10µF X5R or X7R dielectric ceramic

capacitors with 30m to 50m ESR range between

device outputs and ground for stability. The

FP6185 is designed to be stable with low ESR

ceramic capacitors and higher values of capacitors

and ESR could improve output stability. The ESR of

output capacitor is very important because it

generates a zero to provide phase lead for loop

stability.

There are no requirements for the ESR on the input

capacitor, but its voltage and temperature coefficient

have to be considered for device application

environment.

FP6185-Preliminary 0.3-JUN-2017

11

FP6185

SOT-23-5 Package (Unit: mm)

Outline Information

SYMBOLS

UNIT

A

A1

A2

B

D

E

E1

e

e1

L

DIMENSION IN MILLIMETER

MIN MAX

0.90 1.45

0.00

0.90

0.30

2.80

2.60

1.50

0.90

1.80

0.30

0.15

1.30

0.50

3.00

3.00

1.70

1.00

2.00

0.60

Note: Followed From JEDEC MO-178-C.

Carrier Dimensions

Life Support Policy

Fitipower’s products are not authorized for use as critical components in life support devices or other medical systems.

FP6185-Preliminary 0.3-JUN-2017

12