2024年9月1日发(作者：锺希)
19-4759; Rev 1; 1/99
MAX1701 Evaluation Kit
________________General Description____________________________Features
The MAX1701 evaluation kit provides a regulated 3.3V
output while operating on input voltages as low as 0.7V.
o3.3V Output
The input may be a DC source or a 1 to 2–cell battery.
o200mA Output
Efficiency is up to 95% with output loads up to 200mA.
o0.7V to 3.5V Input
The kit, which uses surface-mount components, is fully
assembled and tested for quick evaluation. Jumpers
oUp to 95% Efficiency
are provided to select the output voltage, switching
o3µA Shutdown Current
mode, and shutdown control. This EV kit can also be
used to evaluate the MAX1700. Simply order a free
o300kHz PWM Operation
sample of the MAX1700EEE and replace the
oOptional Low-Power PFM Mode
MAX1701EEE that comes installed on the board.
oSmall Surface-Mount Components
____________________Component List
_______________Ordering Information
DESIGNATIONQTYDESCRIPTION
PARTTEMP. RANGEPIN-PACKAGE
22µF, 25V, low-ESR tantalum capacitor
MAX1701EVKIT0°C to +70°C16-pin QSOP
C11AVX TPSD226M025R0200
Sprague 593D226X0025D
C2, C320.22µF, 25V ceramic capacitors
______________Component Suppliers
C410.10µF, 25V ceramic capacitor
100µF, 10V low-ESR tantalum capaci-
SUPPLIERPHONEFAX
C51tor AVX TPSD107M010R0100 or
AVX(803) 946-0690(803) 626-3123
Sprague 593D107X0010D7
Coilcraft(847) 639-6400(847) 639-1469
C6, C70
Not installed. Space for optional user
Coiltronics(561) 241-7876(561) 241-9339
capacitor.
Sprague(603) 224-1961(603) 224-1430
D11
0.5A, 20V Schottky diode
Sumida(847) 956-0666(847) 956-0702
Motorola MBR0520L
Motorola(303) 675-2140(303) 675-2150
J1, J2, J333-pin jumpers
J4, J522-pin jumpers
10µH, 1.6A power inductor
CoilCraft DO3316-103,
_________________________Quick Start
L11
Coiltronics UP1B-100,
The MAX1701 EV kit is shipped fully assembled and
Sumida CDR74B-100
tested. Follow these steps to verify board operation. Do
R1, R4, R63100kΩ, 1% resistors
not turn on the power supply until all connections
R2, R3, R53Not installed
are completed.
R7, R8, R93100kΩ, 5% resistors
1)Verify that the shunts are connected as listed in
Table 2 for a 3.3V output.
R10, R11, R1231MΩ, 5% resistors
2)Connect a +1.1V to +3.3V supply to the pad marked
R13110Ω, 5% resistor
VIN. The ground connects to the GND pad. Note:
U11MAX1701EEE
the input voltage may drop as low as 0.7V after start-
None5Shunts
up.
None13.4” x 2.4” printed circuit board
3)Connect a voltmeter to the VOUT pad.
None1MAX1700/MAX1701 data sheet
4)Turn on the power and verify that the output voltage
is 3.3V.
5)Connect a load (if any).
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: , or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Evaluates: MAX1700/MAX1701
MAX1701 Evaluation Kit
E
v
a
l
u
a
t
e
s
:
M
A
X
1
7
0
0
/
M
A
X
1
7
0
1
_______________Detailed Description
Jumper Selection
Five jumpers on the printed circuit board allow user
selection of several configurations. Table 1 lists the
jumpers and their functions. Table 2 lists the jumper
positions when the board is set for normal 3.3V output
operation.
Component Selection
The final circuit performance is determined by the qual-
ity of the components surrounding the MAX1701. The
power inductor must not saturate at the 1.6A maximum
peak current produced by MAX1701. Inductors in the
Component List
all have high current ratings and low
coil resistance.
Table 1. Jumper Functions
JUMPER
SHUNT
LOCATION
1 and 2
J1
2 and 3
Open
1 and 2
J2
2 and 3
Open
1 and 2
2 and 3
PIN
CONNECTION
ONA connected to GND
ONA connected to VOUT
ONA is not controlled by the board
ONBconnected to GND
ONB connected to VOUT
ONBis not controlled by the board
CLK/SEL connected to GND
CLK/SEL connected to VOUT
MAX1701 OPERATION
MAX1701 is disabled if ONB is VOUT.
MAX1701 is enabled.
ONA must be driven by a signal connected
to the ONA pad.
MAX1701 is enabled.
MAX1701 is disabled if ONA = GND.
ONBmust be driven by a signal connected
to the ONB pad.
Low-power mode, MAX1701 operates in
the PFM mode.
High-power mode, MAX1701 operates in
the PWM mode.
CLK/SEL pin can be driven by an external
source to select power mode, or a 200kHz
to 400kHz signal to control switching fre-
quency.
VOUT is preset to 3.3V.
Resistors must be installed in R3 and R4 for
proper circuit operation.
VOUT connected to pull-up resistors.
R7–R9 are disconnected so that MAX1701
shutdown current may be verified.
J3
Open
Shorted
J4
Open
Shorted
J5
Open
CLK/SEL connected to CLK/SEL pad
FB connected to GND
FB connected to the resistor divider
Shorted for normal operation
Pull-ups disconnected
Table 2. Jumper Position for Normal 3.3V Operation
JUMPER
J1
J2
J3
SHUNT
LOCATION
2 and 3
1 and 2
2 and 3
PIN
CONNECTION
ONA connected to VOUT
ONBconnected to GND
CLK/SEL connected to VOUT
MAX1701 OPERATION
MAX1701 is enabled.
MAX1701 is enabled.
High-power mode, MAX1701 operates in
the PWM mode.
VOUT is preset to 3.3V. This jumper must
be shorted or resistors installed in R3 and
R4 for proper circuit operation.
J4
J5
2
Shorted
Shorted
FB connected to GND
VOUT connected to pull-up resistors
_______________________________________________________________________________________
MAX1701 Evaluation Kit
The input and output capacitors must have low equiva-nected between LX and P
lent series resistance (ESR) to handle the high peak
OUT
as close to the IC as
possible. A Schottky diode is specified for the lower for-
currents found in switching regulators. Low ESR isward voltage drop as well as the fast switching charac-
especially critical in low-voltage circuits to reduce theteristic. Most Schottky diodes with a sufficient current
AC voltage across the capacitors. A higher ESR on therating will work. The diode for the evaluation board was
output capacitor will increase the output ed for its small size.
Consider using parallel capacitors to reduce the total
ESR if the application requires lower output ripple. An
A separate low-noise ground plane connects pin 5 to
additional output capacitor (C6) may be required for
the reference and signal grounds. This low-noise
output current greater than 200mA or output voltages
ground plane is then connected to the power-ground
less than 3.3V.
plane at the PGND pin (Figure 4).
A low-ESR input capacitor must be located physically
close to the inductor. The Schottky diode must be con-
VIN 0.7V TO 3.5V
C1
GND
22µF
25V
R2
L1
OPEN
10µH
1
D1
VOUT
LBPLX
13
R1
C5
C6
100k
100µF
OPEN
1%
2
LBN
POUT
15
10V
3
REF
R13
C2
10
0.22µF
OUT
14
U1
C3
C4
J5
0.22µF
R3
0.1µF
MAX1701
OPEN
VOUT
FB
11
C7
J4
R4
R11
OPEN
100k
R7R8R9
3
1M
1%
100k100k100k
ONA
J1
2
8
ONA
AO
1
AO
9
3
ONB
J2
2
7
LBO
16
LO BATT
ONB
1
POK
6
PWR 0K
3
CLK/SEL
J3
2
4
CLK/SEL
AIN
10
AIN
1
R10
R12
1M
1M
GND
PGND
R6
R5
512
100k
OPEN
1%
Figure 1. MAX1701 EV Kit Schematic
_______________________________________________________________________________________3
Evaluates: MAX1700/MAX1701
MAX1701 Evaluation Kit
E
v
a
l
u
a
t
e
s
:
M
A
X
1
7
0
0
/
M
A
X
1
7
0
1
1.0"1.0"
Figure 2. MAX1701 EV Kit Component Placement GuideFigure 3. MAX1701 EV Kit PC Board Layout—Component Side
1.0"
Figure 4. MAX1701 EV Kit PC Board Layout—Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
4
_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
©1999 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products.
2024年9月1日发(作者：锺希)
19-4759; Rev 1; 1/99
MAX1701 Evaluation Kit
________________General Description____________________________Features
The MAX1701 evaluation kit provides a regulated 3.3V
output while operating on input voltages as low as 0.7V.
o3.3V Output
The input may be a DC source or a 1 to 2–cell battery.
o200mA Output
Efficiency is up to 95% with output loads up to 200mA.
o0.7V to 3.5V Input
The kit, which uses surface-mount components, is fully
assembled and tested for quick evaluation. Jumpers
oUp to 95% Efficiency
are provided to select the output voltage, switching
o3µA Shutdown Current
mode, and shutdown control. This EV kit can also be
used to evaluate the MAX1700. Simply order a free
o300kHz PWM Operation
sample of the MAX1700EEE and replace the
oOptional Low-Power PFM Mode
MAX1701EEE that comes installed on the board.
oSmall Surface-Mount Components
____________________Component List
_______________Ordering Information
DESIGNATIONQTYDESCRIPTION
PARTTEMP. RANGEPIN-PACKAGE
22µF, 25V, low-ESR tantalum capacitor
MAX1701EVKIT0°C to +70°C16-pin QSOP
C11AVX TPSD226M025R0200
Sprague 593D226X0025D
C2, C320.22µF, 25V ceramic capacitors
______________Component Suppliers
C410.10µF, 25V ceramic capacitor
100µF, 10V low-ESR tantalum capaci-
SUPPLIERPHONEFAX
C51tor AVX TPSD107M010R0100 or
AVX(803) 946-0690(803) 626-3123
Sprague 593D107X0010D7
Coilcraft(847) 639-6400(847) 639-1469
C6, C70
Not installed. Space for optional user
Coiltronics(561) 241-7876(561) 241-9339
capacitor.
Sprague(603) 224-1961(603) 224-1430
D11
0.5A, 20V Schottky diode
Sumida(847) 956-0666(847) 956-0702
Motorola MBR0520L
Motorola(303) 675-2140(303) 675-2150
J1, J2, J333-pin jumpers
J4, J522-pin jumpers
10µH, 1.6A power inductor
CoilCraft DO3316-103,
_________________________Quick Start
L11
Coiltronics UP1B-100,
The MAX1701 EV kit is shipped fully assembled and
Sumida CDR74B-100
tested. Follow these steps to verify board operation. Do
R1, R4, R63100kΩ, 1% resistors
not turn on the power supply until all connections
R2, R3, R53Not installed
are completed.
R7, R8, R93100kΩ, 5% resistors
1)Verify that the shunts are connected as listed in
Table 2 for a 3.3V output.
R10, R11, R1231MΩ, 5% resistors
2)Connect a +1.1V to +3.3V supply to the pad marked
R13110Ω, 5% resistor
VIN. The ground connects to the GND pad. Note:
U11MAX1701EEE
the input voltage may drop as low as 0.7V after start-
None5Shunts
up.
None13.4” x 2.4” printed circuit board
3)Connect a voltmeter to the VOUT pad.
None1MAX1700/MAX1701 data sheet
4)Turn on the power and verify that the output voltage
is 3.3V.
5)Connect a load (if any).
________________________________________________________________
Maxim Integrated Products
1
For free samples & the latest literature: , or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Evaluates: MAX1700/MAX1701
MAX1701 Evaluation Kit
E
v
a
l
u
a
t
e
s
:
M
A
X
1
7
0
0
/
M
A
X
1
7
0
1
_______________Detailed Description
Jumper Selection
Five jumpers on the printed circuit board allow user
selection of several configurations. Table 1 lists the
jumpers and their functions. Table 2 lists the jumper
positions when the board is set for normal 3.3V output
operation.
Component Selection
The final circuit performance is determined by the qual-
ity of the components surrounding the MAX1701. The
power inductor must not saturate at the 1.6A maximum
peak current produced by MAX1701. Inductors in the
Component List
all have high current ratings and low
coil resistance.
Table 1. Jumper Functions
JUMPER
SHUNT
LOCATION
1 and 2
J1
2 and 3
Open
1 and 2
J2
2 and 3
Open
1 and 2
2 and 3
PIN
CONNECTION
ONA connected to GND
ONA connected to VOUT
ONA is not controlled by the board
ONBconnected to GND
ONB connected to VOUT
ONBis not controlled by the board
CLK/SEL connected to GND
CLK/SEL connected to VOUT
MAX1701 OPERATION
MAX1701 is disabled if ONB is VOUT.
MAX1701 is enabled.
ONA must be driven by a signal connected
to the ONA pad.
MAX1701 is enabled.
MAX1701 is disabled if ONA = GND.
ONBmust be driven by a signal connected
to the ONB pad.
Low-power mode, MAX1701 operates in
the PFM mode.
High-power mode, MAX1701 operates in
the PWM mode.
CLK/SEL pin can be driven by an external
source to select power mode, or a 200kHz
to 400kHz signal to control switching fre-
quency.
VOUT is preset to 3.3V.
Resistors must be installed in R3 and R4 for
proper circuit operation.
VOUT connected to pull-up resistors.
R7–R9 are disconnected so that MAX1701
shutdown current may be verified.
J3
Open
Shorted
J4
Open
Shorted
J5
Open
CLK/SEL connected to CLK/SEL pad
FB connected to GND
FB connected to the resistor divider
Shorted for normal operation
Pull-ups disconnected
Table 2. Jumper Position for Normal 3.3V Operation
JUMPER
J1
J2
J3
SHUNT
LOCATION
2 and 3
1 and 2
2 and 3
PIN
CONNECTION
ONA connected to VOUT
ONBconnected to GND
CLK/SEL connected to VOUT
MAX1701 OPERATION
MAX1701 is enabled.
MAX1701 is enabled.
High-power mode, MAX1701 operates in
the PWM mode.
VOUT is preset to 3.3V. This jumper must
be shorted or resistors installed in R3 and
R4 for proper circuit operation.
J4
J5
2
Shorted
Shorted
FB connected to GND
VOUT connected to pull-up resistors
_______________________________________________________________________________________
MAX1701 Evaluation Kit
The input and output capacitors must have low equiva-nected between LX and P
lent series resistance (ESR) to handle the high peak
OUT
as close to the IC as
possible. A Schottky diode is specified for the lower for-
currents found in switching regulators. Low ESR isward voltage drop as well as the fast switching charac-
especially critical in low-voltage circuits to reduce theteristic. Most Schottky diodes with a sufficient current
AC voltage across the capacitors. A higher ESR on therating will work. The diode for the evaluation board was
output capacitor will increase the output ed for its small size.
Consider using parallel capacitors to reduce the total
ESR if the application requires lower output ripple. An
A separate low-noise ground plane connects pin 5 to
additional output capacitor (C6) may be required for
the reference and signal grounds. This low-noise
output current greater than 200mA or output voltages
ground plane is then connected to the power-ground
less than 3.3V.
plane at the PGND pin (Figure 4).
A low-ESR input capacitor must be located physically
close to the inductor. The Schottky diode must be con-
VIN 0.7V TO 3.5V
C1
GND
22µF
25V
R2
L1
OPEN
10µH
1
D1
VOUT
LBPLX
13
R1
C5
C6
100k
100µF
OPEN
1%
2
LBN
POUT
15
10V
3
REF
R13
C2
10
0.22µF
OUT
14
U1
C3
C4
J5
0.22µF
R3
0.1µF
MAX1701
OPEN
VOUT
FB
11
C7
J4
R4
R11
OPEN
100k
R7R8R9
3
1M
1%
100k100k100k
ONA
J1
2
8
ONA
AO
1
AO
9
3
ONB
J2
2
7
LBO
16
LO BATT
ONB
1
POK
6
PWR 0K
3
CLK/SEL
J3
2
4
CLK/SEL
AIN
10
AIN
1
R10
R12
1M
1M
GND
PGND
R6
R5
512
100k
OPEN
1%
Figure 1. MAX1701 EV Kit Schematic
_______________________________________________________________________________________3
Evaluates: MAX1700/MAX1701
MAX1701 Evaluation Kit
E
v
a
l
u
a
t
e
s
:
M
A
X
1
7
0
0
/
M
A
X
1
7
0
1
1.0"1.0"
Figure 2. MAX1701 EV Kit Component Placement GuideFigure 3. MAX1701 EV Kit PC Board Layout—Component Side
1.0"
Figure 4. MAX1701 EV Kit PC Board Layout—Solder Side
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
4
_____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
©1999 Maxim Integrated Products Printed USAis a registered trademark of Maxim Integrated Products.