MAX8903A Maxim Integrated Products, MAX8903A Datasheet - Page 11

• Manufacturer Part Number: MAX8903A
• Description: 2A 1-Cell Li+ DC-DC Charger for USB* and Adapter Power
• Manufacturer: Maxim Integrated Products

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Figure 1. Functional Block Diagram
USB
LIMIT
ADAPTER
500mA
100mA
DC MODE
SUSPEND
LIMIT
USB
AC
DC
USB
USUS
DCM
IUSB
USB
UOK
DOK
IDC
DC
______________________________________________________________________________________
DC POWER
MANAGEMENT
2A 1-Cell Li+ DC-DC Charger for USB*
PWR
PWR
OK
OK
USB POWER
MANAGEMENT
CURRENT-LIMIT
INPUT AND
SET LOGIC
CHARGER
PG
STEP-DOWN
REGULATOR
REGULATOR
CURRENT-
VOLTAGE
INPUT
LIMITED
LIMIT
SET
PWM
INPUT
LIMIT
SET
LX
BST
EP
REGULATION
THERMAL
CS
IC
and Adapter Power
AND SYS LOAD SWITCH
CURRENT-
CHARGER
CONTROL
Li+ BATTERY
AND MONITOR
VOLTAGE
(SEE FIGURE 7)
TERMINATION
THERMISTOR
CHARGER
MONITOR
CHARGE
MAX8903A
CHARGE
TIMER
CHG
ISET
FLT
CT
CEN
SYS
BAT
THM
VL
GND
TO
SYSTEM
LOAD
CONNECTOR
BATTERY
BAT+
NTC
BAT-
T
+
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