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GS2911

300mA CMOS Positive LDO Voltage Regulator

Product Description

The GS2911 is a positive voltage output, three-pin regulator that provides a high current even

when the input/output voltage differential is small. Low power consumption and high accuracy

is achieved through CMOS and laser trimming technologies.

The GS2911 consists of a high-precision voltage reference, an error correction circuit, and a

current limited output driver. Transient response to load variations has improved in comparison

to the existing series.

TO-92 and SOT-89 packages are available.

Features Applications

 Maximum output current: 250mA (within

the maximum power dissipation,

VOUT=5.0V)

 Output voltage: 2.0V to 6.0V in 0.1V

increments (1.1V to 1.9V for custom

products)

 Highly accurate: Output voltage ± 2%

(±1% for semi-custom products)

 Low power consumption: Typ. 2.0µA at

VOUT = 5.0V

 Output voltage temperature coefficient

0.1%/V: Typ. ± 100ppm/℃

 Input stability: Typ. 2.0%/V

 Small input/output differential: IOUT =

100mA at VOUT = 5.0V with a 0.12V

differential.

 SOT-89 and TO-92 packages are

available

 Wireless Communication Systems

 Battery Powered Systems

 Palmtops

 Portable Cameras and Video Recorders

 Voltage Regulator for Microprocessor

 Voltage Regulator for CD-ROM Drivers,

LAN Cards, 56K Modem

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Block Diagram

Vout

Vin

Vss

Current

Limiter

+

-

Voltage

Reference

Package and Pin Assignments

GS2911YXX (SOT-89) GS2911NXX (TO-92)

123

Pin1 = GND

Pin2 = VIN

Pin3 = VOUT

1 2 3

Pin1 = GND

Pin2 = VIN

Pin3 = VOUT

Ordering Information

SOT-89 TO-92 Output

GS2911Y15 GS2911N15 1.5V

GS2911Y18 GS2911N18 1.8V

GS2911Y20 GS2911N20 2.0V

GS2911Y25 GS2911N25 2.5V

GS2911Y33 GS2911N33 3.3V

GS2911Y50 GS2911N50 5.0V

*For additional available fixed voltages contact factory.

*Add “F” means lead free part.

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Absolute Maximum Ratings

Parameter Symbol Ratings

Input Voltage VIN 12V

Output Current IOUT 500 mA

Output Voltage VOUT Vss-0.3 to VIN+0.3

Continuous Total Power Dissipation

TO-92

SOT-89

PD

500 mW

550 mW

Operating Ambient Temperature Topr 0℃ to 80℃

Storage temperature Range Tstg -40℃ to 125℃

Lead Temperature (10 sec) TLEAD 260℃

Electrical Characteristics VOUT(T) =2.0 (Note 1)

Parameter Symbol Conditions Min Typ. Max Unit

Output voltages

VOUT (E)

(Note 2)

IOUT = 40mA

VIN = 3.0V

1.960 2.000 2.040 V

Maximum output current IOUT max

VIN = 3.0V

VOUT(E) ≧ 1.8V

100 mA

Load stability △VOUT

VIN = 3.0V

1mA ≦IOUT ≦60mA

45 90 mV

Vdif IOUT=60mA 180 360 mV Input-Output

Voltage differential (Note 3) I

OUT=120mA 400 700 mV

Supply current ISS V

IN = 3.0V 1.0 100 µA

Line regulation

△VOUT

△VIN * △VOUT

IOUT = 40mA

3.0V≦VIN≦10.0V

0.2 0.3 %/V

Input voltage VIN 10 V

Output voltage

Temperature characteristics

△VOUT

△Topr * △VOUT

IOUT = 40mA

-40℃≦Topr≦85℃

±100 ppm/℃

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Electrical Characteristics VOUT(T) =2.5V (Note 1)

Parameter Symbol Conditions Min Typ. Max Unit

Output voltages

VOUT (E)

(Note 2)

IOUT = 40mA

VIN = 3.5V

2.450 2.500 2.550 V

Maximum output current IOUT max

VIN = 3.5V

VOUT(E) ≧ 2.25V

150 mA

Load stability △VOUT

VIN = 3.5V

1mA ≦IOUT ≦80mA

45 90 mV

Vdif IOUT=80mA 180 360 mV Input-Output

Voltage differential (Note 3) I

OUT=160mA 400 700 mV

Supply current Iss VIN = 3.5V 1.0 100 µA

Line regulation

△VOUT

△VIN * △VOUT

IOUT = 40mA

3.5V≦VIN≦10.0V

0.2 0.3 %/V

Input voltage VIN 10 V

Output voltage

Temperature characteristics

△VOUT

△Topr * △VOUT

IOUT = 40mA

-40℃≦Topr≦85℃

±100 ppm/℃

Electrical Characteristics VOUT(T) =3.3 (Note 1)

Parameter Symbol Conditions Min Typ. Max Unit

Output voltages

VOUT (E)

(Note 2)

IOUT = 40mA

VIN = 4.3V

3.234 3.3 3.366 V

Maximum output current IOUT max

VIN = 4.3V

VOUT(E) ≧ 2.97V

165 mA

Load stability △VOUT

VIN = 4.3V

1mA ≦IOUT ≦80mA

45 90 mV

Vdif VIN = 4.3V Input-Output

Voltage differential (Note 3) IOUT=160mA 400 700 mV

Supply current Iss VIN = 4.3V 1.0 100 µA

Line regulation

△VOUT

△VIN * △VOUT

IOUT = 40mA

4.3V≦VIN≦10.0V

0.2 0.3 %/V

Input voltage VIN 10 V

Output voltage △VOUT IOUT = 40mA ±100 ppm/℃

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Temperature characteristics △Topr * △VOUT -40℃≦Topr≦125℃

Electrical Characteristics VOUT(T) =5.0 (Note 1)

Parameter Symbol Conditions Min Typ Max Unit

Output voltages

VOUT(E)

(Note 2)

IOUT = 40mA

VIN = 6.0V

4.900 5.000 5.100 V

Maximum output current IOUT max

VIN = 6.0V

VOUT(E) ≥ 5.0V

165 mA

Load stability ∆VOUT

VIN = 6.0V

1mA ≤ IOUT ≤80mA

45 90 mV

Vdif VIN = 6.0V Input-Output

Voltage differential (Note 3) Vdif IOUT =200mA 380 600 mV

Supply current Iss VIN = 6.0V 1.0 100 µA

Line regulation

∆VOUT

∆VINi∆VOUT

IOUT = 40mA

4.3V ≤ VIN ≤ 10.0V

0.2 0.3 %/V

Input voltage VIN 10 V

Output voltage

Temperature characteristics

∆VOUT

∆Topri∆VOUT

IOUT = 40mA

-40℃ ≤ Topr ≤125℃

±100 ppm/℃

Note1. VOUT(T) = Specified output voltage.

Note2. VOUT(E) = Effective output voltage (i.e. the output voltage when “ VOUT(T)+1.0V” is provided at the VIN pin while

maintaining a certain IOUT value.)

Note3. Vdif = (VIN 1 (Note 4) – VOUT (E))

Note4. VIN 1 = The input voltage at the time 98% of VOUT(E) is output (input voltage has been gradually reduced).

Typical Performance Characteristics

Output Voltage vs. Output Current

GS2911 (3.3V) GS2911 (5V)

Topr =25℃ 85℃

-40℃

5. 1

4. 7

4. 8

4. 9

5. 0

0 20 40 60 80 100 120 140 160 180

OUTPUT CURRENT: IOUT

(

mA

)

VIN=6V

CIN=1μF(Tantalum), CL=1μF(Tantalum)

OUTPUT VOLTAGE:VOUT(V)

3. 4

3. 3

3. 2

3. 1

3. 0

0 20 40 60 80 100 120 140 160 180

Topr =25℃

- 30℃

80℃

VIN=4.3V

CIN=1μF(Tantalum), CL=1μF(Tantalum)

Output Current IOUT (mA)

Output Voltage:VOUT (V)

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Output Voltage vs. Input Voltage

GS2911 (3.3V) GS2911 (5V)

Input/Output Voltage Differential vs. Output Current

GS2911 (3.3V) GS2911 (5V)

0 20 40 60 80 100 120 140 160 180

-0.2

0. 0

0. 2

0. 4

0. 6

0. 8

1. 0

Topr =25℃ 85℃

-40℃

CIN=1μ F( Tant al um), CL=1μ F( Tant al um)

OUTPUT CURRENT : IOUT (mA)

INPUT/OUTPUT VOLTAGE DIFF. :Vdif (V)

0 20 40 60 80 100 120 140 160 180

-0.2

0. 0

0. 2

0. 4

0. 6

0. 8

1. 0

CIN=1μF(Tantalum), CL=1μF(Tantalum)

OUTPUT CURRENT : IOUT (mA)

INPUT/OUTPUT VOLTAGE DIFF. :Vdif (V)

Topr =25℃ 80℃

-30℃

10mA

40mA

IOUT=1mA

2. 8 3. 3 3. 8

Input Voltage VIN(V)

O

u

t

pu

t

V

o

lt

age

VOUT(V)

2. 5

2. 7

2. 9

3. 1

3. 3

3. 5

Topr=25℃

CIN=1μF(Tantalum), CL=1μF(Tantalum)

10mA

40mA

IOUT=1mA

5. 2

5. 0

4. 8

4. 6

4. 4

4. 2

4. 5 5. 0 5.

5

Topr=25℃

CIN=1μ F( Tant al um), CL=1μ F( Tant al um)

INPUT VOLTAGE : VIN (V)

OUTPUT VOLTAGE : VOUT (V)

10mA

40mA

IOUT=1mA

56 7891

0

4. 85

4. 90

4. 95

5. 00

5. 05

5. 10

INPUT VOLTAGE:VIN

(

V

)

OUTPUT VOLTAGE:VOUT(V)

Topr=25

℃

CIN=1μF(Tantalum), CL=1μF(Tantalum

)

40mA

IOUT=1mA,10mA

345678910

3. 15

3. 20

3. 25

3. 30

3. 35

3. 40

Input Voltage VIN (V)

Topr=25℃

CIN=1μF(Tantalum), CL=1μF(Tantalum)

Output Voltage VOUT (V)

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Supply Current vs. Input Voltage

GS2911 (3.3V) GS2911 (5V)

Load Transient Response

GS2911 (3.3V) GS2911 (5V)

0246810

0

1

2

3

INPUT VOLTAGE:VIN(V)

SUPPLY CURRENT:Iss(μA)

Topr =25℃

85℃

-40℃

Topr =25℃

80℃

-30℃

345678910

1. 50

1. 75

2. 00

2. 25

2. 50

Input Voltage VIN(V)

Supply Current Iss(μA)

TIME(2msec/div)

2

3

4

5

6

7

0

40

80

120

160

200

OUTPUT VOLTAGE:VOUT(V)

OUTPUT CURRENT:IOUT(mA)

VIN=6V, CL=1μF(Tantalum)

Output Voltage

Output Current

40mA

1mA

TI ME( 2msec/ di v)

0. 3

1. 3

2. 3

3. 3

4. 3

5. 3

0

40

80

120

160

200

OUTPUT VOLTAGE:VOUT(V)

OUTPUT CURRENT:IOUT(mA)

VIN=4.3V, CL=1μF(Tantalum)

Output Voltage

Output Current

40mA

1mA

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Typical Application Circuits

Vin 1uF

(Trantalum) 1uF

(Trantalum)

Vin Vout

Vss

V

A

Vin Vout

Vss

Vin

A

Open

Notes on Use

1. There is a possibility that oscillation may occur as a result of the impedance present

between the power supply and the IC’s input. Where impedance is 10Ω or more, please

use a capacitor (CIN) of at least 1µF. With a large output current, operations can be

stabilised by increasing capacitor size (CIN). If CIN is small and capacitor size (CL) is

increased, there is a possibility of oscillation due to input impedance. In such cases, either

increasing the size of CIN or decreasing the size of CL can stabilize operations.

2. Please ensure that output current (IOUT) is less than PD + (VIN - VOUT) and does not exceed

the stipulated Continuous Total Power Dissipation value (PD).

3. Should you wish to increase output current (IOUT) and/or have the capability to exceed the

stipulated PD value, using a current boost circuit (similar to the one shown below) is likely

to lead to oscillation. With such applications, we recommend use of a boost type voltage

regulator, such as the GS2911 series.

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Package Dimension

SOT-89 PLASTIC PACKAGE

Dimensions In Millimeters Dimensions In Inches

Symbol

Min Max Min Min

A 1.450 1.550 0.570 0.061

b 0.440 0.480 0.017 0.019

C 0.360 0.400 0.014 0.016

E 4.450 4.550 0.175 0.179

E2 1.500 1.700 0.059 0.067

E3 1.400Ref 0.055Ref

e 1.500BSC 0.059BSC

e1 3.000BSC 0.118BSC

H 4.150 4.250 0.163 0.167

D 2.450 2.550 0.096 0.100

L 0.900 1.100 0.035 0.043

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TO-92 PLASTIC PACKAGE

0+1.00+1.0

21.0max

16±0.5

9.0+0.5

4.0±0.2

12.7±0.3

6.35±0.5 2.5+0.4 or 2.5-0.1

1.0max

6.0±0.5

18.0+1.6 or 18.0-0.5

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Information furnished is believed to be accurate and reliable. However Globaltech Semiconductor

assumes no responsibility for the consequences of use of such information nor for any infringement of

patents or other rights of third parties, which may result from its use. No license is granted by implication

or otherwise under any patent or patent rights of Globaltech Semiconductor. Specifications mentioned in

this publication are subject to change without notice. This publication supersedes and replaces all

information without express written approval of Globaltech Semiconductor.