User guide

MAX8737
Dual, Low-Voltage Linear Regulator Controllers
with External MOSFETs
14 ______________________________________________________________________________________
R6B
100kΩ
POWER
GOOD 2
N2
R3B
33Ω
C2B
0.22µF
C
IN2
10µF
C
SYS2
*
100µF
C
OUT2
22µF
1.05V
3A (MAX)
INPUT
1.25V TO 1.5V
ON
OFF
R9
100kΩ
R8
42.2kΩ
R7
47.5kΩ
ON
OFF
R6A
100kΩ
POWER
GOOD 1
C
IN1
10µF
C
SYS1
*
100µF
C
OUT1
10µF
1.5V
2A (MAX)
C1
1.0µF
5V BIAS
SUPPLY
INPUT
1.8V TO 2.5V
R3A
27Ω
C2A
0.1µF
GND
REFIN2
REFIN1
EN1
OUT1
DRV1
PGOOD1
CS1
V
CC
CS2
PGOOD2
DRV2
OUT2
EN2
MAX8737
NOTE: THE SYSTEM REFERENCE IS TYPICALLY
GENERATED BY THE STEP-DOWN CONVERTER
USED TO POWER THE DUAL LOW-VOLTAGE
LINEAR REGULATORS.
SYSTEM REF (2.0V)
N1
N1/N2: Si 4922DY
*A LOCAL 10µF CERAMIC CAPACITOR IS SUFFICIENT
FOR MOST APPLICATIONS. IF THE MAX8737 IS POWERED
FROM A HIGH-IMPEDANCE SOURCE, ADDITIONAL LOW-ESR
POLYMER CAPACITORS ARE RECOMMENDED ON THE INPUT.
Figure 4. Typical Operating Circuit with Output Undervoltage Protection
Chip Information
TRANSISTOR COUNT: 1562
PROCESS: BiCMOS