MB3817_03 Datasheet, PDF (4/28 Pages) Fujitsu Component Limited. – Switching Regulator Controller

MB3817
s BLOCK DIAGRAM
FB
5
−IN
4
+IN ₃
Error
− ^Amp.
+
DTC
6
CS
CS
13
1 µA
Q1
Soft Start
− _Comp.
+
PWM
Comp.
SCP
− Comp.
+
OUT
CB1
7
8
CB2
OFF
current
setting
block
9
VCC
Q4
10
OUT
Q6
D1
11
Q5
(0.5 V)
VE
(0.9 V)
1.5 V
SCP
OSC
−1.4 V
bias
−1.0 V
RS
Latch
UVLO
1 µA
bias
VCC
Q2 Q3 Ref Power 15
(1.5 V) ON/OFF
CTL
12
CT RT
14 16
12
CSCP VREF GND
4