ETC1 GS2905 500ma cmos ldo voltage regulator Datasheet

GS2905
500mA CMOS LDO Voltage Regulator
Product Description
The GS2905 series is a group of positive voltage output, three-pin regulators, that provide
a high current even when the input/output voltage differential is small. Low power
consumption and high accuracy is achieved through CMOS and programmable fuse
technologies. Output voltage: 1.5V to 6.0V.
The GS2905 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.
The GS2905 incorporates both over-temperature and over-current protection. SOT-89 and
SOT-223 packages are available.
Features
Applications
n
Maximum output current: 500mA
n
Highly accurate: Output voltage ± 1.4% n
Battery-Operated Systems
(± 1% for semi-custom products)
n
Portable Computer
n
Low power consumption
n
Portable Cameras and Video Recorders
n
Over-Current and Over-temperature
n
Voltage Regulator for Microprocessor
Protection
n
Reference Voltage Sources
Small input/output differential:0.3V at
n
Voltage Regulator for CD- ROM Drivers,
n
Wireless Communication Systems
n
300mA
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LAN Cards and DVD.
n
Instrumentation
n
Pagers
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GS2905
GS2905
Globaltech Semiconductor
Block Diagram
V IN
1
3
V OUT
CURRENT
LIMITING
THERMAL
SHUTDOWN
0.9V
REFERENCE
2 GND
Packages & Pin Assignments
GS2905Y (SOT-89)
GS2905X (SOT-223)
1
1
2
2
3
3
Pin1 = GND
Pin1 = GND
Pin2 = VIN
Pin2 = VIN
Pin3 = VOUT
Pin3 = VOUT
Ordering Information
SOT-89
SOT-223
Output
GS2905Y15
GS2905X15
1.5V
GS2905Y18
GS2905X18
1.8V
GS2905Y25
GS2905X25
2.5V
GS2905Y33
GS2905X33
3.3V
GS2905Y36
GS2905X36
3.6V
GS2905Y50
GS2905X50
*GS2905XF, X means package type and F means Lead Free part.
*For other output voltages, please contact factory.
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2
5.0V
GS2905
GS2905
Globaltech Semiconductor
Absolute Maximum Ratings
Symbol
Parameter
Maximum
SOT-89
120
SOT223
100
Unit
°C/W
uJA
Thermal Resistance
VIN
Input Voltage
6.5
V
IOUT
Output Current
500
mA
VOUT
Output Voltage
VSS-0.3 to VIN +0.3
V
0 to 70
°C
-65 to 150
°C
300
°C
TJ
Operating Junction Temperature
TSTG
Storage temperature Range
TLEAD
Lead Temperature (Soldering, 10 sec)
Note: Stresses above those listed under “Absolute Maximum Ratings” may cause permanent damage to the device.
These are stress ratings only and functional operation of the device at these or any other conditions above those
indicated in the operation sections of the specifications is not implied.
Exposure to Absolute Maximum Ratings conditions for extended periods may affect device reliability.
Electrical Characteristics VOUT (T) =2.0 (Note 1)
Parameter
Output Voltage Accuracy
Min
Typ.
Max
IOUT = 1mA
-1.4%
-
1.4%
IOUT = 0.1mA to 500mA (TA=25°C)
-4.5%
-
2.0%
-
0.1
0.3
%/V
-
0.005
0.04
%/mA
Line regulation
△VOUT/(△VINX△VOUT)
Test
Conditions
Circuit
IOUT = 1mA
Fig. 1
Unit
V
(VOUT+0.1V)<VIN<6.5V
V IN=6V
Load Regulation (Note1)
Fig. 2
0.1mA<IOUT<500mA, C OUT=1µF
Maximum output current
V IN=5V
500
mA
500
mA
VOUT >0.96 X VRATING
Current Limit
Ground Pin Current
IOUT= 0mA~500mA
Fig. 3
-
15
30
µA
IOUT=100mA
100
180
IOUT=500mA
600
900
IOUT=100mA
150
300
IOUT=500mA
750
900
IOUT=100mA
200
400
IOUT=500mA
1100
1500
Dropout Voltage
For VOUT>2.5V
For 2.0V<VOUT≦2.5V
For VOUT≦2.0V
mV
mV
mV
Note1: Load Regulation is measured using pulse techniques with duty cycle<5%
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GS2905
GS2905
Globaltech Semiconductor
Test Circuits
Line Regulation
Figure. 1
6.5V
3.4V
1
VIN
GS2905-3.3 3
V OUT
2
Io=1mA
1mF
GND
Load Regulation
Figure. 2
PULSE WITH DUTY
CYCLES 5%
VIN=6V
1
GS2905-3.3 3
1 mF
2
GND
VOUT
1 mF
0.1mA Io=500mA
Ground Current
Figure. 3
VIN=3.8V
1
GS2905-3.3 3
VOUT
2
GND
33V
mA
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Io=100mA
GS2905
GS2905
Globaltech Semiconductor
Typical Performance Characteristics
Ground Current VS. Input Voltage
102
GROUND CURRENT(mA)
NORMALIZED OUTPUT VOLTAGE(%)
Output Voltage VS. Temperature
15.0
101
100
99
98
0
15
30
45
60
10
5.0
0
75 90
TEMPERATURE( 8C)
1
2
3
4
5
6
7 8
INPUT VOLTAGE(V)
OUTPUT
VOLTAGE(mV,AC)
Load Transient Response
20
0
-20
-40
LOAD
CURRENT(mA)
-60
300
1
0
1
2
3
TIME(ms)
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5
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GS2905
GS2905
Globaltech Semiconductor
Typical Applications
Low Dropout Linear Regulator
VIN
VOUT
1 GS2905-3.3 3
CIN
1 mF
2
C OUT
GND
1mF
A 1µF (or greater) capacitor is required between the GS2905 output and ground for stability.
Without this capacitor the part will oscillate. Even though most types of capacitor may work,
the equivalent series resistance (ESR) should be held to 5 or less if Aluminum electrolytic
type is used. Many Aluminum electrolytic have electrolytes that freeze at about -30°C, so
solid tantalums are recommended for operation below -25°C. The value of this capacitor
may be increased without limit.
A 0.1µF capacitor (or greater) should be placed from the GS2905 input to ground if the lead
inductance between the input and power source exceeds 500nH (approximately 10 inches
of trace).
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GS2905
GS2905
Globaltech Semiconductor
Package Dimension
SOT-223 PLASTIC PACKAGE
Θ
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
A
1.520
1.800
0.060
0.071
A1
0.020
0.100
0.001
0.004
A2
1.500
1.700
0.059
0.067
b
0.610
0.810
0.024
0.032
c
0.250
0.350
0.010
0.014
D
6.300
6.700
0.248
0.264
D1
2.900
3.100
0.114
0.122
E
3.300
3.700
0.130
0.146
E1
6.700
7.300
0.264
0.287
e
e1
L
L1
2.300 (TYP)
4.500
0.091 (TYP)
4.700
0.177
1.750 (TYP)
0.069 (TYP)
0.900
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0.185
0.035
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GS2905
GS2905
Globaltech Semiconductor
SOT-89 PLASTIC PACKAGE
Symbol
Dimensions In Millimeters
Dimensions In Inches
Min
Max
Min
Max
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
1.400 (TYP)
0.055 (TYP)
e
1.500 (TYP)
0.059 (TYP)
e1
3.000 (TYP)
0.118 (TYP)
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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GS2905
GS2905
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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GS2905
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