Datasheet

MAX8903A–E/G/H/J/N/Y
2A 1-Cell Li+ DC-DC Chargers
for USB and Adapter Power
13
Maxim Integrated
SYS
BATTERY
CONNECTOR
BAT+
BAT-
+
NTC
T
THM
USB
BAT
ISET
Li+ BATTERY
CHARGER
AND SYS LOAD SWITCH
IC
THERMAL
REGULATION
CHARGER
CURRENT-
VOLTAGE
CONTROL
USB
UOK
DC
DOK
DC POWER
MANAGEMENT
PWM
STEP-DOWN
REGULATOR
PWR
OK
USB POWER
MANAGEMENT
CURRENT-
LIMITED
VOLTAGE
REGULATOR
SET
INPUT
LIMIT
PWR
OK
VL
CHG
FLT
CT
CHARGE
TERMINATION
AND MONITOR
CHARGE
TIMER
THERMISTOR
MONITOR
(SEE FIGURE 7)
CEN
INPUT AND
CHARGER
CURRENT-LIMIT
SET LOGIC
DCM
DC
IUSB
USUS
IDC
500mA
100mA
USB
LIMIT
DC
LIMIT
AC
ADAPTER
GND
DC MODE
USB
SUSPEND
TO
SYSTEM
LOAD
LX
CS
BST
SET
INPUT
LIMIT
PG
EP
MAX8903_
Figure 1. Functional Block Diagram