ICs for Telephone
1
Publication date: November 2001 SDE00001BEB
AN1201SM
Polarity inverting charge pump DC/DC converter IC
a73 Overview
AN1201SM is a negative voltage generation IC for
bias voltage of transmission power module of cellular
phones. This IC is a polarity inverting DC/DC converter
to change from positive voltage into negative voltage.
a73 Features
• High power conversion efficiency: 89% typ. (when output
current is 5 mA.)
• Low output resistance: 20 Ω typ.
• High voltage conversion efficiency: 99.9%
• Small (S-MINI) package
a73 Applications
• Cellular phones
SMINI-5D
Unit: mm
a73 Block Diagram
0 to 0.10
4
5
3
2
1
0.8
±0.10
0.15
±0.05
0.20
±0.05
2.10±0.10
0.225±0.05
1.65±0.10
0.225±0.05
2.00
±0.10
1.30
±0.10
0.65
±0.05
0.65
±0.05
C2
5
V
IN
1
V
OUT
2
GND
4
C1
3
S3S1
S2
S4
OSC
• Marking
A L
Part No.: "AL" indicates AN1201SM.
Pin No.1 displayed
Note) The package of this product will be changed
to lead-free type (SMINI-5DA). See the new
package dimensions section later of this
datasheet.