Richtek RT9161-15PX, RT9161-18PV, RT9161-18PX, RT9161-20PV, RT9161-21PX Schematic [ru]

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RT9161/A

300/500mA Low Dropout Linear Voltage Regulator

General Description

The RT9161/A is a 300/500mA fixed output voltage low dropout linear regulator. Typical ground current is approximately 110μA, from zero to maximum loading conditions. Wide range of available output voltage fits most of applications. Built-in output current-limiting most thermal-limiting provide maximal protection against any fault conditions.

For ease of application, the RT9161/Acomes in the popular 3-pin SOT-23 (300mA), SOT-89 (300mA), SOT-223 (500mA), or TO-92 packages.

Ordering Information

RT9161/A-

Package Type

V : SOT-23-3

X : SOT-89

G : SOT-223

ZL : TO-92 (L-Type)

ZT : TO-92 (T-Type)

Lead Plating System P : Pb Free

G : Green (Halogen Free and Pb Free)

Output Voltage 15 : 1.5V

16 : 1.6V

:

49 : 4.9V

50 : 5.0V

500mA Output Current

300mA Output Current

Note :

Richtek products are :

`RoHS compliant and compatible with the current requirements of IPC/JEDEC J-STD-020.

`Suitable for use in SnPb or Pb-free soldering processes.

Features

zLow Dropout Voltage of 200mV at Output Current 100mA, 450mV at Output Current 300mA, and 750mV at 500mA Output Current

zGuaranteed 300/500mA Output Current

zInternal 1.5Ω P-MOSFET Draws No Base Current

zLow Ground Current 110μA

z2% Accuracy Output Voltage

zInput Voltage Range up to 12V

zExtremely Tight Load Regulation

zFast Transient Response

zCurrent-limiting and Thermal-limiting

zRoHS Compliant and 100% Lead (Pb)-Free

Applications

zVoltage Regulator for LAN Card, CD-ROM, and DVD

zWireless Communication Systems

zBattery Powered Systems

Marking Information

For marking information, contact our sales representative directly or through a Richtek distributor located in your area.

Pin Configurations

(TOP VIEW)

VIN

3

2

GND VOUT

SOT-23-3

1

2

3

GND VIN VOUT (TAB)

SOT-89

 

 

 

 

 

 

 

 

 

 

 

 

1

 

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GND

 

VIN

VOUT

 

 

 

 

(TAB)

 

 

 

 

 

 

 

SOT-223

 

 

 

 

 

 

 

 

 

 

 

DS9161/A-35 April 2011

 

 

 

 

 

 

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1

RT9161/A

3 VOUT 2 GND 1 VIN

TO-92 (L-Type)

Typical Application Circuit

 

 

 

RT9161/A

VIN

CIN

+

VIN

VOUT

 

 

 

GND

 

1uF

 

 

 

3 VOUT 2 VIN

1 GND

TO-92 (T-Type)

+

VOUT

COUT

 

10uF

 

Electrolytic

Functional Pin Description

Pin Name

Pin Function

VOUT

Output Voltage.

 

 

GND

Ground.

VIN

Power Input.

 

 

Function Block Diagram

VIN

 

VOUT

Current

Error Amp

 

Limiting

-

+

Sensor

Thermal

1.2V

 

Shutdown

 

Reference

 

 

GND

 

 

www.richtek.com

DS9161/A-35 April 2011

2

 

 

 

 

 

 

RT9161/A

Absolute Maximum Ratings

 

 

 

 

z Input Voltage ----------------------------------------------------------------------------------------------------------------

 

 

 

 

 

−0.3 to 14V

z Operating Junction Temperature Range -------------------------------------------------------------------------------

 

 

 

−40°C to 125°C

z Storage Temperature Range ---------------------------------------------------------------------------------------------

 

 

 

 

−65°C to 150°C

z Power Dissipation, PD @ TA = 25°C

 

 

 

 

 

SOT-23-3---------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

0.4W

 

SOT-89 -----------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

0.571W

SOT-223 ---------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

0.741W

TO-92 -------------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

0.625W

z Package Thermal Resistance

(Note 1)

 

 

 

 

 

SOT-23-3, θJA ---------------------------------------------------------------------------------------------------------------

 

 

 

 

 

250°C/W

SOT-23-3, θJC ---------------------------------------------------------------------------------------------------------------

 

 

 

 

 

140°C/W

SOT-89, θJA -----------------------------------------------------------------------------------------------------------------

 

 

 

 

 

175°C/W

SOT-89, θJC -----------------------------------------------------------------------------------------------------------------

 

 

 

 

 

100°C/W

SOT-223, θJA ----------------------------------------------------------------------------------------------------------------

 

 

 

 

 

135°C/W

SOT-223, θJC ---------------------------------------------------------------------------------------------------------------

 

 

 

 

 

15°C/W

TO-92, θJA -------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

160°C/W

TO-92, θJC -------------------------------------------------------------------------------------------------------------------

 

 

 

 

 

125°C/W

Electrical Characteristics

 

 

 

 

 

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

 

 

 

 

 

 

 

 

 

 

 

 

 

Parameter

 

Symbol

Test Conditions

Min

Typ

Max

Unit

 

 

 

 

 

 

 

 

Output Voltage Accuracy

VOUT

IL = 1mA, VIN = 5V

−2

--

2

%

Output Voltage Temperature

 

 

--

50

150

PPM/°C

Coefficient

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Line Regulation

 

VLINE

IL = 1mA, VIN= 4.5 to 12V

--

2

3

%VOUT

Load Regulation

(Note 2)

VLOAD

IL = 1mA to 300/500mA, VIN = 5V

--

1

30/50

mV

Current Limit

 

RT9161

ILIM

VIN = 5V, VOUT = 0V

350

580

--

mA

(Note 3)

 

RT9161A

500

900

--

 

 

 

 

 

 

 

 

 

 

 

Dropout Voltage

(Note 4)

VDROP

IL = 300/500mA

--

450/750

600/1000

mV

 

 

 

 

 

 

 

 

Standby Current

 

ISTANDBY

IL = 0, VIN = 12V

--

110

180

μ

 

 

 

 

 

 

A

Note 1. θJA is measured in the natural convection at TA = 25°C on a low effective single layer thermal conductivity test board of JEDEC 51-3 thermal measurement standard.

Note 2. Regulation is measured at constant junction temperature, using pulsed ON time. Note 3. Current Limit is measured at constant junction temperature, using pulsed ON time.

Note 4. The dropout voltage is defined as VIN − VOUT, which is measured when VOUT is VOUT(NORMAL) − 100mV.

DS9161/A-35 April 2011

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Richtek RT9161-15PX, RT9161-18PV, RT9161-18PX, RT9161-20PV, RT9161-21PX Schematic

RT9161/A

Typical Operating Characteristics

Output Voltage (V)

Temperature Stability

3.4

3.2

 

VOUT = 3.3V

 

3

2.8

2.6

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VOUT = 2.5V

 

 

 

 

 

 

 

 

 

 

 

2.4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

-50

-25

0

25

50

75

100

125

Temperature (°C)

Quiescient Current vs. Temperature

 

0.14

 

 

 

 

 

(mA)

0.12

 

 

 

 

 

0.10

 

 

 

 

 

Current

0.08

 

 

 

 

 

0.06

 

 

 

 

 

Quiescient

 

 

 

 

 

0.04

 

 

 

 

 

0.02

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VIN = 5V

 

0.00

 

 

 

 

 

 

-30

0

30

60

90

120

Temperature (°C)

Dropout Voltage (VIN-VOUT)

 

1

 

 

 

 

1.4

 

 

 

 

 

125°C

1.2

 

0.8

 

 

 

 

Dropout Voltage (V)

 

 

 

 

 

 

 

 

 

25°C

1

0.6

 

 

 

 

 

 

 

 

0.8

 

 

 

 

 

0.4

 

 

 

 

0.6

 

 

 

 

 

 

 

 

 

 

0.4

0.2

 

 

 

 

CurrentCircuitShort(A)

 

 

 

 

 

 

0.2

 

0

 

 

 

VOUT = 3.3V

 

 

 

 

 

0

 

0

100

200

300

400

500

ILoad (mA)

Short Circuit Current

 

 

 

125°C

 

 

 

 

 

25°C

 

 

0

2

4

6

8

10

Input/Output Differential (V)

Line Transient Response

Line Transient Response

Input Voltage

Deviation (V)

7

COUT = 10μF Electrolytic

VOUT = 3.3V

Input Voltage

Deviation (V)

7

COUT = 10μF Electrolytic

VOUT = 2.5V

 

 

6

IOUT = 0.1A

 

TA = 25°C

6

IOUT = 0.1A

TA = 25°C

5

 

T

 

5

T

 

4

 

 

 

4

 

 

 

 

 

 

 

 

 

 

 

 

 

 

T

 

 

 

Output Voltage

Deviation (mV)

100

 

 

 

Output Voltage

Deviation (mV)

100

T

 

 

 

 

 

 

2 >

 

 

 

2 >

 

 

0

 

 

 

0

 

 

1 >

 

 

 

1 >

 

 

-100

 

 

 

-100

 

 

 

 

 

 

 

 

 

 

 

-200

 

Time 100μS/Div)

 

 

-200

100μS/Div)

 

 

 

 

 

 

 

 

 

 

 

Time (100μs/Div)

 

 

 

 

Time(100μs/Div)

 

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