HT78XX Series
500mA TinyPower
TM
LDO
Features
·
Output voltage ranges: Fixed range of 1.8V, 2.5V,
·
Low quiescent current: 5mA (typ.)
·
Current limiting
·
Over-temperature shutdown
·
SOT-89, TO-92 Packages
2.7V, 3.0V, 3.3V, 5.0V type.
·
Highly accuracy:
±2%
·
Low voltage drop: 360mV (typ.),
V
OUT
=5.0V at 500mA
·
Guaranteed output current: 500mA
Applications
·
Battery powered systems
·
Personal Digital Assistants
·
Peripheral cards
·
PCMCIA cards
·
Personal Communication Equipment
General Description
The HT78XX series of positive, linear regulators fea-
tures low quiescent current (5mA typ.) with low dropout
voltage, making them ideal for battery applications. The
devices are capable of supplying 500mA of output cur-
rent continuously.
They are available with several fixed output voltages
ranging from 1.8V to 5.0V. Although designed primarily
as fixed voltage regulators, these devices can be used
with external components to obtain variable voltages
and currents.
These rugged devices have Thermal Shutdown and
Current Limiting to prevent device failure under the
²Worst²
of operating conditions.
Selection Table
Part No.
HT7818
HT7825
HT7827
HT7830
HT7833
HT7850
Output Voltage
1.8V
2.5V
2.7V
3.0V
3.3V
5.0V
±2%
SOT-89
TO-92
Tolerance
Package
Block Diagram
V IN
O v e rc u rre n t
S h u td o w n
T h e rm a l
S h u td o w n
R 1
A M P
V O U T
V
re f
R 2
G N D
Rev. 1.00
1
March 2, 2007
HOLTEK [ HOLTEK SEMICONDUCTOR INC ]
