MB3776A Datasheet, PDF (3/16 Pages) Fujitsu Component Limited. – Switching Regulator Controller

s BLOCK DIAGRAM
MB3776A
VCC
OSC
3
7
CTL 2
Reference
voltage
1.25 V
0.6 V
0.1 V
Internal bias &
reference voltage
Error Amp.
-IN 1
-
X 100
+
36 kΩ
FB 8
0.5 V
470 Ω
Saw-tooth
waveform
0.1 V
P. W. M. Comp
-
+
Output drive
+
control
D. T. C. ( 0.6 V)
6
GND
IS ∝ IB
Is
30 kΩ
5 _OUT
4 IB
3