ICs for CD/CD-ROM Player
n Overview
The AN8083S is an IC for controlling a DC-DC convert-
er suitable for the switching power supply of various
portable equipments. It can operate with input voltage
1.1V or more.
n Features
• Operatable with low voltage input (PV
CC
>1.1V)
• Decreased voltage detection circuit built-in
• Short-circuit protection feature built-in
• Provided with reset output
• Synchronizable with outside clock
• Low consumption current in stand-by mode
• Output voltage in secondary side; 4.8V+0.3V (Variable
by using external resistance)
AN8083S
Low Voltage Operation IC for DC-DC Converter
0.1
–
0.1
1.5
–
0.2
0.3 0.650.15
0.4 1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
0.4
–
0.25
1.27
Unit : mm
6.5– 0.3
4.2– 0.3
10.1
–
0.3
16-lead SOP package (SOP016-P-0225A)
15 1316 14 7
1 2 3 4 5
6
VSEN
PVCC
IN
10 12
9
8
11
Power
OFF
63kΩ
–+
GND
0.9V
1.25V
0.7V
4.2V
0.725V
30kΩ
2.0V
4.8V
1.25V 3.0 → 2.5V
2.15V
0.25V
0.85V
VREF
–25µA
–+
–
+
+
–
+
–
+
–
+
RESET EMP START VREFCT
CLK
POWER
FB SPRO DED OUT
Starter SW
Early Value Set.
Starter
Switching
Circuit
Triangular
Wave
VCC
n Block Diagram