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MB39A105
17
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■■
■
APPLICATION EXAMPLE
+
−
−
+
+
+
−
−
+
A
A
R5
43 kΩ
R6
330 kΩ
R8
100 kΩ
R7
22 kΩ
R4
51 kΩ
R11
100 kΩ
R1
7.5 kΩ
ON/OFF CTL
(L : OFF, H : ON)
C9
0.1 µF
C8
0.22 µF
C4
4.7 µF
C3
4.7 µF
C2
4.7 µF
C1
0.1 µF
L1
6.8 µH
C5
4.7 µF
C6
4.7 µF
C7
0.1 µF
D1
V
O
(9.0 V)
Q2
Q1
1
8
2
−INE
FB
CSCP
VIN
(1.8 V to
6.0 V)
7
RT
Q3
6
5
GND
OUT
4
3
SCPOD
VCC
VREF
VREF
Error Amp
SCP
Comp.
PWM
Comp.
Drive
Nch
I
O = 400 mA
at VCC = 3.3 V
(0.5 V ± 1%)
±10%
(1.0 V)
UVLO
OSC
SQ
R
(0.9 V)
(0.7 V)
(0.3 V)
bias
RT Current
VREF
Power
ON/OFF
CTL
VREF
(1.27 V)
L : UVLO release