MB3775 Datasheet, PDF (2/25 Pages) Fujitsu Component Limited. – SWITCHING REGULATOR CONTROLLER

MB3775
s BLOCK DIAGRAM
VREF=1.28V
16
Error Amp 1
3+
4
_
5
12
Error Amp 2
14 +
13
_
15
9
VCC
Reference
Voltage
2.5V
1.9V -
1.3V -
+ ^{S.C.P. Comp}
_+
1.1V
2.5V
1µA
SR
Latch
R
U.V.L.O.
+
+
_
D.T.C. Comp
1
2
Triangular
Waveform
OUT 1
7
+__
PWM Comp 1
+__
OUT 2
10
PWM Comp 2
1.28V
0.9V 0.9V
1.8V
8
GND
6
11
s RECOMMENDED OPERATING CONDITIONS
Parameter
Power Supply Voltage
Error Amp. Input Voltage
Collector Output Voltage
Collector Output Current
Phase Compensation Capacitor
Timing Capacitor
Timing Resistor
Oscillator Frequency
Reference Voltage Output Current
Operating Temperature
Symbol
VCC
VI
VO
IO
CP
CT
RT
fOSC
IREF
TOP
Value
Min
Typ
Max
3.6
6.0
18
-0.2
–
1.45
–
–
18
0.3
–
50
–
0.1
–
150
–
15000
5.1
–
100
1
–
500
-3
-1
–
-30
25
85
Unit
V
V
V
mA
µF
pF
kΩ
kHz
mA
°C
2