Preliminary
RT9161B
Simple Lithium-Ion Battery Charger
General Description
The RT9161B is a single-cell lithium-ion battery
charger. It includes an on-chip pass transistor for
high precision charging. Featuring with ultrahigh
precision (±1%), the RT9161B provides a very
effective and low cost solution for charging lithium-
ion battery.
Other features of the RT9161B are current limit and
thermal shutdown protection. The output voltage of
RT9161B is internally set and ranges from 4.10V to
4.35V, in 0.05V steps. The RT9161B comes in the
SOT-89 and SOT-223 packages.
Features
High Accuracy Charge Voltage:
±
1%
6 Available Output Voltages
Low 450mV Dropout at 300mA
Wide Input Voltage Range
Thermal Shutdown and Current Limit Protection
SOT-89 and SOT-223
Low Ground Current 110µA
µ
Applications
Li-Ion Battery Charger
Cellular Phones
Palmtop Computers
PDAs
Self Charging Battery Packs
Ordering Information
RT9161B-
Package type
X : SOT-89
G : SOT-223
Operating temperature range
C: Commercial standard
Output voltage
41 : 4.10V
4A : 4.15V
42 : 4.20V
4B : 4.25V
43 : 4.30V
4C : 4.35V
Pin Configurations
Part Number
RT9161B-
CX
1
2
3
Pin Configurations
TOP VIEW
1. GND
2. VIN (TAB)
3. VOUT
TOP VIEW
1. GND
2. VIN (TAB)
3. VOUT
(Plastic SOT-89)
RT9161B-
CG
1
2
3
(Plastic SOT-223)
DS9161B-02 April 2001
www.richtek-ic.com.tw
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
