MB3885 Datasheet, PDF (4/29 Pages) Fujitsu Component Limited. – 1-channel DC/DC Converter IC with Synchronous Rectifier

MB3885
s BLOCK DIAGRAM
VCC
10
FB 7
10 µA
−INE 8
CS 6
Error Amp.
−
+
+
+INC 9
1.25 V
OVP Comp.
+
DTC
−
1.47 V
VCC
Latch
R
SQ
PWM Comp.1
+
+
−
PWM Comp.2
+
−
5 V Reg.
Drive1
Drive2
11 VB
12 CB
13 OUT1
14 VS
15 OUT2
16 PGND
SCP Comp.
1 µA
CSCP 3
2.1 V
bias
SR
Latch
UVLO
OSC
4
5
CT RT
1.9 V
1.3 V
bias VCC
Ref
(2.5 V)
Power
18
17
VREF SGND
4