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MB39A105
4
■
■■
■
BLOCK DIAGRAM
+
−
−
+
+
+
−
+
−
1
8
2
−INE
FB
CSCP
7
RT
6
5
GND
OUT
43
SCPODVCC
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