HT78Bxx -- High PSRR 500mA LDO Regulator

General Description

The HT78Bxx 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 HT78Bxx'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 18uA, and the line transient response and the load transient response of HT78Bxx are excellent, thus these ICs are very suitable for the power supply for hand-held communication equipment.

The space-saving SOT23-5, SOT223 and SOT89 package will be an attractive additional feature for pocket and hand-held applications.