Preliminary |
RT9161B |
Simple Lithium-Ion Battery Charger
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 lithiumion 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.
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
zHigh Accuracy Charge Voltage: ±1%
z6 Available Output Voltages
zLow 450mV Dropout at 300mA
zWide Input Voltage Range
zThermal Shutdown and Current Limit Protection
zSOT-89 and SOT-223
zLow Ground Current 110 A
zLi-Ion Battery Charger
zCellular Phones
zPalmtop Computers
zPDAs
zSelf Charging Battery Packs
Part Number |
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Pin Configurations |
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RT9161BCX |
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TOP VIEW |
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1. |
GND |
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(Plastic SOT-89) |
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2. |
VIN (TAB) |
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1 |
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2 |
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3 |
3. |
VOUT |
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RT9161BCG |
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TOP VIEW |
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1. |
GND |
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(Plastic SOT-223) |
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2. |
VIN (TAB) |
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1 |
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3. |
VOUT |
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DS9161B-02 April 2001 |
www.richtek-ic.com.tw |
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1 |
RT9161B |
Preliminary |
zInput Voltage -0.3 ~ 14V
zPower Dissipation, PD @ TA = 25°C
SOT-89 0.5W
• |
Package Thermal Resistance |
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SOT-89, θJC |
100°C/W |
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SOT-89, θJA |
300°C/W |
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SOT-223, θJC |
15°C/W |
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SOT-223, θJA |
60°C/W |
z Operating Junction Temperature Range |
-40°C ~ 125°C |
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Storage Temperature Range |
-65°C ~ 150°C |
(TA = 25°C, CIN = 1µF, COUT = 10µF, unless otherwise specified)
Parameter |
Symbol |
Test Conditions |
Min |
Typ |
Max |
Units |
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Input Voltage Range (1) |
VIN |
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4.5 |
-- |
14 |
V |
Output Voltage Accuracy |
∆VOUT |
IL = 1mA, VIN = 5V |
-1 |
-- |
+1 |
% |
Output Voltage Temperature |
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-- |
50 |
150 |
PPM/°C |
Coefficient (1) |
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Line Regulation |
∆VLINE |
IL = 1mA, VIN = 4.5 ~ 12 V |
-- |
2 |
3 |
%VOUT |
Load Regulation (2) |
∆VLOAD |
IL = 1mA ~ 300/500/mA, , VIN = 5V |
-- |
1 |
30/50 |
mV |
Current Limit (3) |
ILIMIT |
VIN = 5V, VOUT = 0V |
300 |
-- |
600 |
mA |
Dropout Voltage (4) |
VDROP |
IL = 300/500mA |
-- |
450/750 |
-- |
mV |
Standby Current |
ISTANDBY |
IL = 0, VIN = 12V |
-- |
110 |
180 |
µA |
Note: |
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(1)Guaranteed by design.
(2)Regulation is measured at constant junction temperature, using pulsed ON time.
(3)Current Limit is measured at constant junction temperature, using pulsed ON time.
(4)Dropout is measured at constant junction temperature, using pulsed ON time.
VIN |
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VOUT |
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Error |
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+ |
Amp |
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Current Limit |
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1.2V |
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Thermal |
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Reference |
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Shutdown |
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GND |
www.richtek-ic.com.tw |
DS9161B-02 April 2001 |
2