GS2905 Datasheet PDF - Globaltech

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GS2905
Globaltech

Part Number GS2905
Description 500mA CMOS LDO Voltage Regulator
Page 9 Pages


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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 Wireless Communication Systems
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
n Small input/output differential:0.3V at n Voltage Regulator for CD- ROM Drivers,
300mA
LAN Cards and DVD.
n Instrumentation
n Pagers
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GS2905
Block Diagram
Globaltech Semiconductor
VIN 1
CURRENT
LIMITING
THERMAL
SHUTDOWN
3 VOUT
0.9V
REFERENCE
2 GND
Packages & Pin Assignments
GS2905Y (SOT-89)
GS2905X (SOT-223)
12 3
Pin1 = GND
Pin2 = VIN
Pin3 = VOUT
1 23
Pin1 = GND
Pin2 = VIN
Pin3 = VOUT
Ordering Information
SOT-89
SOT-223
GS2905Y15
GS2905X15
GS2905Y18
GS2905X18
GS2905Y25
GS2905X25
GS2905Y33
GS2905X33
GS2905Y36
GS2905X36
GS2905Y50
GS2905X50
*GS2905XF, X means package type and F means Lead Free part.
*For other output voltages, please contact factory.
Output
1.5V
1.8V
2.5V
3.3V
3.6V
5.0V
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GS2905
Globaltech Semiconductor
Absolute Maximum Ratings
Symbol
Parameter
Maximum
Unit
uJA Thermal Resistance
SOT- 89
SOT223
120
100
°C/W
VIN Input Voltage
6.5 V
IOUT
Output Current
500 mA
VOUT
Output Voltage
VSS-0.3 to VIN +0.3
V
TJ Operating Junction Temperature
0 to 70
°C
TSTG
Storage temperature Range
-65 to 150
°C
TLEAD Lead Temperature (Soldering, 10 sec)
300
°C
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
Conditions
Test
Circuit
Min
Typ. Max
Unit
Output Voltage Accuracy
IOUT = 1mA
IOUT = 0.1mA to 500mA (TA=25°C)
Line regulation
IOUT = 1mA
VOUT/( VINX VOUT)
(VOUT+0.1V) VIN 6.5V
Load Regulation (Note1)
VIN=6V
0.1mA IOUT 500mA, COUT=1µF
Fig. 1
Fig. 2
-1.4%
-4.5%
-
-
1.4%
2.0%
V
- 0.1 0.3 %/V
- 0.005 0.04 %/mA
Maximum output current
Current Limit
VIN=5V
VOUT 0.96 X VRATING
500
500
mA
mA
Ground Pin Current
Dropout Voltage
IOUT= 0mA~500mA
Fig. 3
-
15 30 µ A
For VOUT 2.5V
IOUT=100mA
IOUT=500mA
100 180
mV
600 900
For 2.0V VOUT 2.5V
IOUT=100mA
IOUT=500mA
For VOUT 2.0V
IOUT=100mA
IOUT=500mA
Note1: Load Regulation is measured using pulse techniques with duty cycle 5%
150
750
200
1100
300
900
400
1500
mV
mV
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GS2905
Test Circuits
Globaltech Semiconductor
Line Regulation Figure. 1
6.5V
3.4V
1 VIN
V OUT
GS2905-3.3 3
2
GND 1mF
Io=1mA
Load Regulation Figure. 2
VIN=6V
1
VOUT
GS2905-3.3 3
2
1mF GND 1mF
PULSE WITH DUTY
CYCLES 5%
0.1mA Io=500mA
Ground Current Figure. 3
VIN=3.8V
1
VOUT
GS2905-3.3 3
2
GND
mA
33V
Io=100mA
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