AK7903 Datasheet, PDF (2/10 Pages) Asahi Kasei Microsystems – DCDC Step-down Converter for NiH2 Battery

■ BLOCK DIAGRAM
VIN
Ci=1µF
AK7903
Bulk
Current Limit
COMP
PWM
Control
RT
ISET
EN1
VDD
OPOUT
TSD
Current
Monitor
SW3
SW1
SW2
[AK7903]
SW
L=4.7µH
SENSE RES
Co=
10µF
GND
FB
SENSE
Battery pack
PIN1（Gain=3.75 times）
PIN2(Gain=1.96 times)
Ci=0.1µF
NIN
EN2 CONT
Figure 1. AK7903 Block Diagram
*) The BULK of PMOS connects to the high voltage of VIN or SW.
MS1190-E-00
2
2010/6