R1280D002X Datasheet, PDF (2/26 Pages) RICOH electronics devices division – 2CH PWM DC/DC Controller

s BLOCK DIAGRAM
q R1280D002A/C
VFB1
AMPOUT1
Vrefout
VFB2
Vrefout
DTC1
OSC
CH１
Vref1
UVLO
q R1280D002B
VFB1
CE
CHIP ENABLE
Vrefout
VFB2
Vrefout
CH２
DTC2
DTC1
OSC
CH1
Vref1
UVLO
Rev.1.10
CH２
DTC2
-2-
EXT1
Latch
D elay C ircuit
V IN
GND
EXT2
EXT1
VIN
GND
Latch
Delay Circuit
EXT2