FUJITSU MB39A105 - Manual (Page 4)

MB39A105
4
■ ■ ■ ■ BLOCK DIAGRAM
+
−
−
+
+
+
−
+
−
1
8
2
−
INE
FB
CSCP
7
RT
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
S Q
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