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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
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. 2.0A 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 available and TO-92 packages are
Applications
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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GS2911
GS2911
Globaltech Semiconductor
Block Diagram
Vin
Vout
Current Limiter
+ Voltage Reference
Vss
Package and Pin Assignments
GS2911YXX (SOT-89) GS2911NXX (TO-92)
1 2 3
1
2
3
Pin1 = GND Pin2 = VIN Pin3 = VOUT
Pin1 = GND Pin2 = VIN Pin3 = VOUT
Ordering Information
SOT-89 GS2911Y15 GS2911Y18 GS2911Y20 GS2911Y25 GS2911Y33 GS2911Y50 *Add "F" means lead free part. www.globaltechsemi.com 2 GS2911 TO-92 GS2911N15 GS2911N18 GS2911N20 GS2911N25 GS2911N33 GS2911N50 Output 1.5V 1.8V 2.0V 2.5V 3.3V 5.0V
*For additional available fixed voltages contact factory.
GS2911
Globaltech Semiconductor
Absolute Maximum Ratings
Parameter Input Voltage Output Current Output Voltage Continuous Total Power Dissipation TO-92 SOT-89 Operating Ambient Temperature Storage temperature Range Lead Temperature (10 sec) Topr Tstg TLEAD PD 500 mW 550 mW 0 to 80 -40 to 125 260 Symbol VIN IOUT VOUT Ratings 12V 500 mA Vss-0.3 to VIN+0.3
Electrical Characteristics
Parameter Symbol VOUT (E) Output voltages (Note 2)
VOUT(T) =2.0 (Note 1) Conditions IOUT = 40mA 1.960 VIN = 3.0V VIN = 3.0V 2.000 2.040 V Min Typ. Max Unit
Maximum output current
IOUT max VOUT(E) 1.8V VIN = 3.0V
100
mA
Load stability
VOUT 1mA IOUT 60mA
45
90
mV
Input-Output Voltage differential (Note 3) Supply current
Vdif
IOUT=60mA IOUT=120mA
180 400 1.0
360 700 100
mV mV A
ISS VOUT
VIN = 3.0V IOUT = 40mA
Line regulation VIN * VOUT Input voltage Output voltage Temperature characteristics VIN VOUT Topr * VOUT IOUT = 40mA 3.0VVIN10.0V
0.2
0.3
%/V
10
V
100 -40Topr85
ppm/
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GS2911
GS2911
Globaltech Semiconductor
Electrical Characteristics
Parameter Symbol VOUT (E) Output voltages (Note 2)
VOUT(T) =2.5V (Note 1) Conditions IOUT = 40mA 2.450 VIN = 3.5V VIN = 3.5V 2.500 2.550 V Min Typ. Max Unit
Maximum output current
IOUT max VOUT(E) 2.25V VIN = 3.5V
150
mA
Load stability
VOUT 1mA IOUT 80mA
45
90
mV
Input-Output Voltage differential (Note 3) Supply current
Vdif
IOUT=80mA IOUT=160mA
180 400 1.0
360 700 100
mV mV A
Iss VOUT
VIN = 3.5V IOUT = 40mA
Line regulation VIN * VOUT Input voltage Output voltage Temperature characteristics VIN VOUT Topr * VOUT IOUT = 40mA 3.5VVIN10.0V
0.2
0.3
%/V
10
V
100 -40Topr85
ppm/
Electrical Characteristics
Parameter Symbol VOUT (E) Output voltages (Note 2)
VOUT(T) =3.3 (Note 1) Conditions IOUT = 40mA 3.234 VIN = 4.3V VIN = 4.3V 3.3 3.366 V Min Typ. Max Unit
Maximum output current
IOUT max VOUT(E) 2.97V VIN = 4.3V
165
mA
Load stability
VOUT 1mA IOUT 80mA
45
90
mV
Input-Output Voltage differential (Note 3) Supply current
Vdif
VIN = 4.3V IOUT=160mA 400 1.0 700 100 mV A
Iss VOUT
VIN = 4.3V IOUT = 40mA
Line regulation VIN * VOUT Input voltage Output voltage VIN VOUT IOUT = 40mA 4.3VVIN10.0V
0.2
0.3
%/V
10 100
V ppm/
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GS2911
GS2911
Globaltech Semiconductor
Temperature characteristics
Topr * VOUT
-40Topr125
Electrical Characteristics
Parameter Symbol VOUT(E) Output voltages (Note 2)
VOUT(T) =5.0 (Note 1) Conditions IOUT = 40mA 4.900 VIN = 6.0V VIN = 6.0V 5.000 5.100 V Min Typ Max Unit
Maximum output current
IOUT max
165 VOUT(E) 5.0V VIN = 6.0V 45 1mA IOUT 80mA VIN = 6.0V IOUT =200mA VIN = 6.0V IOUT = 40mA 0.2 0.3 380 1.0 600 100 90
mA
Load stability
VOUT
mV
Input-Output Voltage differential (Note 3) Supply current
Vdif Vdif Iss VOUT
mV A
Line regulation VINiVOUT Input voltage Output voltage Temperature characteristics VIN VOUT TopriVOUT IOUT = 40mA -40 Topr 125 4.3V VIN 10.0V
%/V
10
V
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)
3. 4 VIN=4.3V CIN=1 F(Tantalum), CL=1 F(Tantalum)
OUTPUT VOLTAGE:VOUT(V) 5. 1 5. 0 4. 9
GS2911 (5V)
VIN=6V CIN=1 F(Tantalum), CL=1 F(Tantalum)
Output Voltage:VOUT (V)
3. 3 - 30 3. 2 3. 1 3. 0 0 20 40 60
Topr =25 80
- 40
Topr =25
4. 8 4. 7
85
80 100 120 140 160 180
0
20 40
60
80 100 120 140 160 180
Output Current IOUT (mA)
OUTPUT CURRENT: IOUT(mA)
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GS2911
GS2911
Globaltech Semiconductor
Output Voltage vs. Input Voltage GS2911 (3.3V) GS2911 (5V)
OUTPUT VOLTAGE : VOUT (V)
5. 2 5. 0 T opr=25 C N F ant al um C I =1 (T ), L=1 F ant al um (T )
Output Voltage VOUT(V)
3. 5 3. 3 3. 1 2. 9 2. 7
Topr=25 CIN=1 F(Tantalum), CL=1 F(Tantalum)
IOUT=1mA 40mA
IOUT=1mA
4. 8 4. 6 4. 4 4. 2 4. 5
40mA
10mA 3. 3 3. 8
10mA
2. 5 2. 8
5. 0
5. 5
Input Voltage VIN(V)
Topr=25 CIN=1 F(Tantalum), CL=1 F(Tantalum) IOUT=1mA,10mA
INPUT VOLTAGE : VIN (V)
Output Voltage VOUT (V)
3. 40 3. 35 3. 30 3. 25 3. 20 3. 15
OUTPUT VOLTAGE:VOUT(V)
5. 10 5. 05 5. 00 4. 95 4. 90 4. 85 5
Topr=25 CIN=1 F(Tantalum), CL=1 F(Tantalum)
IOUT=1mA 40mA 10mA
40mA
3
4
5
6
7
8
9
10
Input Voltage VIN (V)
6
7
8
9
10
INPUT VOLTAGE:VIN(V)
Input/Output Voltage Differential vs. Output Current GS2911 (3.3V)
INPUT/OUTPUT VOLTAGE DIFF. :Vdif (V) 1. 0 0. 8 0. 6 0. 4 0. 2 0. 0 - 0. 2 Topr =25 80 - 30 0 20 40 60 80 100 120 140 160 180 OUTPUT CURRENT : IOUT (mA)
CIN=1 F(Tantalum), CL=1 F(Tantalum)
GS2911 (5V)
INPUT/OUTPUT VOLTAGE DIFF. :Vdif (V) 1. 0 0. 8 0. 6 0. 4 0. 2 0. 0 -0. 2 -40 0 20 40 60 80 100120140160180 OUTPUT CURRENT : IOUT (mA) T opr=25 85
C N F ant al um C I =1 (T ), L=1 F ant al um (T )
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GS2911
GS2911
Globaltech Semiconductor
Supply Current vs. Input Voltage GS2911 (3.3V) GS2911 (5V)
SUPPLY CURRENT:Iss( A)
Supply Current Iss( A)
2. 50 2. 25 2. 00 1. 75 1. 50
3 2 1 0
Topr =25 85 - 40
80 T 25 opr= -30
0
2
4
6
8
10
3
4
5
6
7
8
9
10
Input Voltage VIN(V)
INPUT VOLTAGE:VIN(V)
Load Transient Response GS2911 (3.3V)
OUTPUT CURRENT:IOUT(mA)
GS2911 (5V)
OUTPUT VOLTAGE:VOUT(V)
200 160
OUTPUT VOLTAGE:VOUT(V)
5.3 4.3 3.3 2.3
7 6 5 4 3 2
200 160
O utput Voltage
120 80
Output Voltage
120 80
A 1.3 40m 1m A 0.3 TIM E(2m sec/div)
O utput Current
40 0
40mA 1mA
Output Current
40 0
TIME(2msec/div)
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GS2911
OUTPUT CURRENT:IOUT(mA)
VIN=4.3V, CL=1 F(Tantalum )
VIN=6V, CL=1 F(Tantalum)
GS2911
Globaltech Semiconductor
Typical Application Circuits
Open
Vin Vout Vin A Vin Vss 1uF 1uF (Trantalum) (Trantalum) V Vin Vout
Vss
A
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 10 or more, please use a capacitor (CIN) of at least 1F. 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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GS2911
GS2911
Globaltech Semiconductor
Package Dimension
SOT-89 PLASTIC PACKAGE
Symbol A b C E E2 E3 e e1 H D L
Dimensions In Millimeters Min 1.450 0.440 0.360 4.450 1.500 1.400Ref 1.500BSC 3.000BSC 4.150 2.450 0.900 4.250 2.550 1.100 Max 1.550 0.480 0.400 4.550 1.700
Dimensions In Inches Min 0.570 0.017 0.014 0.175 0.059 0.055Ref 0.059BSC 0.118BSC 0.163 0.096 0.035 0.167 0.100 0.043 Min 0.061 0.019 0.016 0.179 0.067
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GS2911
GS2911 TO-92 PLASTIC PACKAGE
Globaltech Semiconductor
0+1.0
0+1.0
18.0+1.6 or 18.0-0.5
1.0max 9.0+0.5
21.0max
160.5
6.00.5
4.00.2 6.350.5 12.70.3
2.5+0.4 or 2.5-0.1
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GS2911
GS2911
Globaltech Semiconductor
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.
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GS2911

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