HT72BXX Datasheet, PDF (1/13 Pages) Holtek Semiconductor Inc – High PSRR 300mA LDO Regulator

HT72Bxx
High PSRR 300mA LDO Regulator
Features
• Output Voltage: 1.5V/1.8V/2.5V/2.8V/
3.0V/3.3V/5V
• High Output Voltage Accuracy: ±2%
• HT72B25 Low Voltage Drop: 0.34V (Typ.)
(V_OUT=2.5V @ I_OUT=300mA)
• Maximum Input Voltage: 7.0V
• Guaranteed Output Current: 300mA
• Low Power Consumption: 18uA (Typ.)
• High Ripple Rejection: 70dB (1kHz@I_OUT=30mA)
• Power-saving Shutdown Mode
• Over Temperature Protection
• Current Limiting
• SOT23-5, SOT89 Package
Applications
• Portable communication equipment
• Portable music player
• Electrical appliances such as cameras, VCRs and
camcorders
• Battery-powered equipment
Selection Table
Part No.
HT72B15
HT72B18
HT72B25
HT72B28
HT72B30
HT72B33
HT72B50
Output Voltage
1.5V
1.8V
2.5V
2.8V
3.0V
3.3V
5.0V
General Description
The HT72Bxx series are CMOS-based voltage
regulator ICs with high output voltage accuracy, low
quiescent current, low on Resistance, and high ripple
rejection. Each of these ICs consists of a voltage
reference unit, an error amplifier, resistor-net for
voltage setting, a current limit circuit, a chip enable
circuit, and so on.
The HT72Bxx’s current limiters' fold back circuit
also operates as a short circuit protect function for the
output current limiter.
These ICs perform with low dropout voltage and the
chip-enable function. The quiescent current of this IC
is only 18μA, and the line transient response and the
load transient response of HT72Bxx are excellent,
thus these ICs are very suitable for the power supply
for hand-held communication equipment.
The space-saving SOT23-5, SOT89 package will be
an attractive additional feature for pocket and hand-
held applications.
Tolerance
±2%
Package
SOT23-5
SOT89
Rev. 1.00
1
August 24, 2011