RICHTEK RT9161B-41CG, RT9161B-41CX, RT9161B-42CG, RT9161B-42CX, RT9161B-43CG Datasheet

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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 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.

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

Features

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

Applications

zLi-Ion Battery Charger

zCellular Phones

zPalmtop Computers

zPDAs

zSelf Charging Battery Packs

Pin Configurations

Part Number

 

 

 

 

Pin Configurations

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RT9161BCX

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TOP VIEW

 

 

 

 

 

 

 

 

 

 

 

 

1.

GND

(Plastic SOT-89)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

VIN (TAB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

2

 

 

3

3.

VOUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RT9161BCG

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TOP VIEW

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.

GND

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(Plastic SOT-223)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

2.

VIN (TAB)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

2

 

 

3

 

3.

VOUT

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DS9161B-02 April 2001

www.richtek-ic.com.tw

 

1

RICHTEK RT9161B-41CG, RT9161B-41CX, RT9161B-42CG, RT9161B-42CX, RT9161B-43CG Datasheet

RT9161B

Preliminary

Absolute Maximum Ratings

zInput Voltage -0.3 ~ 14V

zPower Dissipation, PD @ TA = 25°C

SOT-89 0.5W

Package Thermal Resistance

 

 

SOT-89, θJC

100°C/W

 

SOT-89, θJA

300°C/W

 

SOT-223, θJC

15°C/W

 

SOT-223, θJA

60°C/W

z Operating Junction Temperature Range

-40°C ~ 125°C

z

Storage Temperature Range

-65°C ~ 150°C

Electrical Characteristics

(TA = 25°C, CIN = 1µF, COUT = 10µF, unless otherwise specified)

Parameter

Symbol

Test Conditions

Min

Typ

Max

Units

 

 

 

 

 

 

 

Input Voltage Range (1)

VIN

 

4.5

--

14

V

Output Voltage Accuracy

∆VOUT

IL = 1mA, VIN = 5V

-1

--

+1

%

Output Voltage Temperature

 

 

--

50

150

PPM/°C

Coefficient (1)

 

 

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:

 

 

 

 

 

 

(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.

Function Block Diagram

VIN

 

 

 

VOUT

 

 

 

 

Error

 

 

_

+

Amp

 

 

 

 

 

 

 

 

Current Limit

 

1.2V

 

Thermal

 

 

 

Reference

 

Shutdown

 

 

 

 

 

 

 

 

 

GND

www.richtek-ic.com.tw

DS9161B-02 April 2001

2

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