HT1087 Datasheet, PDF (1/13 Pages) Holtek Semiconductor Inc – 0.5A General Purpose LDO

HT1087 Series
0.5A General Purpose LDO
Features
· Output voltage ranges: Fixed range of 1.5V, 1.8V,
2.5V, 3.3V, 5.0V or adjustable type.
· High accuracy: ±2%
· Low voltage drop: 1.1V (typ.), V_OUT=5.0V at 0.5A
· Guaranteed output current: 0.5A
· Low quiescent current: 8mA (typ.)
· Integrated current limit & thermal protection circuits
· SOT89, TO92 packages
Applications
· Active SCSI terminations
· Post regulator for switching power supplies
· Low voltage microcontrollers
· Motherboard clock supplies
· Battery chargers
General Description
The HT1087 devices are a series of three-terminal high
current low voltage regulators. They can deliver an out-
put current of 0.5A and can accept input voltages up to
12V. The devices are available in both adjustable and
fixed output voltage type with a range of 1.5V to 5.0V. In-
ternal current limit and thermal protection circuits pro-
vide protection against overload conditions that could
create excessive junction temperatures.
Selection Table
Part No.
HT1087-ADJ
HT1087-15
HT1087-18
HT1087-25
HT1087-33
HT1087-50
Output Voltage
Adjust
1.5V
1.8V
2.5V
3.3V
5.0V
Package
SOT89
TO92
Note: For lead free devices, a ²#² mark is suffixed at the end of the date code.
Block Diagram
V IN
Marking
HT1087-ADJ
HT1087-15
HT1087-18
HT1087-25
HT1087-33
HT1087-50
C u rre n t
L im itin g
A m p lifie r
T h e rm a l
P r o te c tio n
V OUT
E rro r
A m p.
B andgap
R e fe re n c e
ADJ
Rev. 1.10
GND
1
October 5, 2007