MB3885 Datasheet, PDF (24/29 Pages) Fujitsu Component Limited. – 1-channel DC/DC Converter IC with Synchronous Rectifier

C12
Vin
0.1 µF
VCC
10
5 V Reg.
A
Output
On/Off
signal
SW1
FB
C3
7
0.022 µF
R1
2 kΩ
R6
2.7 kΩ
−INE ₈
R3
10 kΩ _R2
CS ₆
C4
3.3 kΩ 0.1 µF
R4
6.2 kΩ
+INC ₉
R5
10 kΩ
10 µA
Error Amp.
−
+
+
OVP
1.25 V ^Comp.
+
−
Latch
VCC _R
1.47 V
SQ
PWM Comp.1
DTC
+
+
−
PWM
Comp.2
+
−
Drive1
Drive2
VB
11
D2
C8
CB ^{4.7 µF}
12
OUT1
13
C1 ⁺
VS
14
22 µF
C9
0.1 µF
Q1
A
Vo (2 V)
L1
2.7 µH
C2
C10 ₊
0.1 µF
Q2
D1
68 µF
×3
C11
2.2 µF
OUT2
15
PGND
16
SCP Comp.
1 µA
CSCP
3
C5
0.01 µF
2.1 V
bias
SR
Latch
UVLO
1.9 V
1.3 V
OSC
bias VCC
Ref
(2.5 V) ^Power
4
CT
C6
470 pF
5
18
17
RT VREF SGND
R7
C7
10 kΩ 0.1 µF