HT72XX Datasheet, PDF (1/12 Pages) Holtek Semiconductor Inc – 300mA TinyPowerTM LDO

HT72XX Series
300mA TinyPower^TM LDO
Features
· Output voltage ranges: Fixed range of 1.8V, 2.5V,
2.7V, 3.0V, 3.3V, 5.0V type.
· Highly accuracy: ±2%
· Low voltage drop: 240mV (typ.),
V_OUT=5.0V at 300mA
· Maximum Input Voltage: 8V
· Guaranteed output current: 300mA
· Low quiescent current: 5mA (typ.)
· Current limiting
· Over-temperature shutdown
· SOT-23, SOT-89, TO-92 Packages
Applications
· Portable electronics
· Wireless devices
· Cordless phones
· PC peripherals
· Battery powered devices
· Electronic scales
General Description
The HT72XX series of positive, linear regulators fea-
tures low quiescent current (5mA typ.) with low dropout
voltage, making them ideal for battery applications. The
space-saving SOT-23 package is attractive for ²Pocket²
and ²Hand Held² applications. The devices are capable
of supplying 300mA of output current continuously.
Selection Table
Part No.
HT7218
HT7225
HT7227
HT7230
HT7233
HT7250
Output Voltage
1.8V
2.5V
2.7V
3.0V
3.3V
5.0V
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.
Tolerance
±2%
Package
SOT-23
SOT-89
TO-92
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
R1
AM P
V re f
R2
VO UT
GND
Rev. 1.10
1
June 20, 2007