GM1117S
1A LOW DROPOUT
PRECISION VOLTAGE REGULATOR
Description
Features
The GM1117S is a positive low dropout
regulator and is available in an adjustable
version and fixed output voltage from 1.5V to
5.0V. All internal circuitry is designed to
operate down to 800mV input to output
differential and the dropout voltage is fully
specified as a function of load current. On chip
trimming adjusts the reference/output voltage
to within ± 1%. Current limit is also trimmed in
order to minimize the stress on both the
regulator and the power source circuitry under
overloaded conditions.
Adjustable or Fixed Output
Output Current of 1.0A
Dropout Voltage 1.5V max @ 1.0A
Line Regulation 0.2% max.
Load Regulation 0.4% max.
Fast Transient Response
Current Limit Protection
Thermal Shutdown Protection
Application
High Efficiency Linear Regulators
Post Regulators for Switching Supplies
Microprocessor Supply
Battery Powered Equipment
Reference Voltage Sources
Hard Drive Controllers
Battery Chargers
Adjustable Power Supply
Typical Application Circuits
VOUT
VIN
VOUT
VIN
GM1117S-x.x
GM1117S
R1
133Ω
C2
C2
C1
10µF
C1
10µF
10µF
R2
232Ω
10µF
Adjustable Regulator
R2
R1
Fixed Output Voltage Regulator
VOUT =1.25V
(
1+
)
1
GAMMA [ GAMMA MICROELECTRONICS INC. ]
