Rainbow Electronics MAX781 - Manual (Page 8)

MAX781
PDA/Hand-Held Computer Power Controller
8 _______________________________________________________________________________________
_________________________________________________Pin Description (continued)
33 TEMP Analog Multiplexer Input and Battery Sense Input
34 AUXIN Analog Multiplexer Input
25 3OUT +3.3V Regulator Feedback Connection and Linear-Regulated + 3.3V Output
26 CS +3.3V Regulator Current-Sense Input
35
–
S
—
H
—
D
—
N
–
Shutdown-Mode Control Input
36 GD1 High-Side Gate-Driver Output
29 VCHG Charger Voltage Input
30 UVLO Undervoltage Lockout Threshold Input
31 REF +2.5V Reference Output
32 AOUT Analog Multiplexer Buffered Output
27 SS +3.3V Regulator Soft-Start Capacitor Connection
28 BATT Battery Voltage Input
MAX781
C7
M1
M2
T1
C12
C11
+5V LOW
CURRENT OUTPUT
+14V OUTPUT
+3.3V
OUTPUT
PCMCIA 2.0
CARD SLOT
VPPs
D7
D6
D5
C6
C9 C8
GATE DRIVERS
FOR POWER
SWITCHING
R7
5OUT
VHI
BATT
DHI
BST
LX
DLO
PGND
CS
3OUT
AGND
VPPA SPI
COMPATIBLE
SERIAL
INTERFACE
VPPB
GD1
UVLO SS
GD5
AOUT
AUXIN
FAST
INT
DOUT
DIN
SCLK
CE
CSBAT
COMP
TEMP
SYNC
REF
DCHG
R4
R8
D2
BATTERY
CHARGER
SECTION
M3
L1
D3
C14 D1
BATTERY
CHARGER
DC INPUT
R1
C1
C3 C2
C5
C10 T
VCHG
SHDN
Figure 1. Typical Operating Circuit