
Holtek Semiconductor
General Description
The HT1117 devices are a series of three-terminal high current low voltage regulators. They can deliver an out
put current of 1A and can accept input voltages up to 12V. The devices are available in both adjustable and
fixed output voltage type with a range of 1.8V to 5.0V. In ternal current limit and thermal protection circuits provide protection against overload conditions that could create excessive junction temperatures.
FEATUREs
Output voltage ranges: Fixed range of 1.8V, 2.5V, 2.85V, 3.3V, 5.0V or adjustable type.
High accuracy:2%
Low voltage drop: 1.1V (typ.), VOUT=5.0V at 1A
Guaranteed output current: 1A
Low quiescent current: 8mA (typ.)
Integrated current limit & thermal protection circuits
SOT-223 package
APPLICATIONs
Active SCSI terminations
Post regulator for switching power supplies
Low voltage microcontrollers
Motherboard clock supplies
Battery chargers