GS1117
Vishay Semiconductors
formerly General Semiconductor
Document Number 74802 www.vishay.com
20-Feb-02 1
New Product
800mA Low Dropout
Positive Adjustable Regulator
Description
The GS1117 is a low dropout three terminal regulator with
800mA output current capability. The output voltage is
adjustable with the use of a resistor divider. For fixed out-
put voltage versions, the output voltage is internally set at
2.5V, 2.85V, 3.3V or 5V. Dropout is guaranteed at a maxi-
mum of 1.4V at maximum output current. Its low dropout
voltage and fast transient response make it ideal for low
voltage microprocessor applications. Internal thermal limiting
provides protection against any overload condition that
would create excessive junction temperatures.
Applications
• SCSI-2 Active Terminator
• Post Regulator for Switching Supply
• Battery Chargers
• Constant-Current Regulators
• PC Add-On Card
Mechanical Data
Case: TO-220AB, TO-263AB (D
2
PAK),
TO-252 (DPAK) and SOT-223
High temperature soldering guaranteed:
260°C/10 seconds at terminals
Case outlines are on the back page
+
+
--
For
fixed
voltage
device
Thermal
Limit
Current
Amp
Current
Limit
GM
VOUT
VIN
ADJ GND
VREF
1.25V
55µA
Functional Block Diagram
Features
• Dropout Voltage 1.2V at 800mA Output Current
• Fast Transient Response
• Line Regulation typically at 0.015%
• Load Regulation typically at 0.1%
• Internal thermal limiting
• Adjustable Output Voltage or Fixed 2.5V, 2.85V, 3.3V, 5V
• Standard 3-Pin Power Packages
TO-220AB TO-263AB
(D
2
Pak)
GS1117CT GS1117CMGS1117CE
TO-252
(DPak)
1
2
3
1
2
3
1
2
3
GS1117CST
SOT-223
1
2
3
Pin Definition
1. Adjust/Gnd.
2. Vout (tab)
3. Vin