• 简体中文
• English

LTC1928-5 - Doubler Charge Pump with Low Noise Linear Regulator in SOT-23

An internal charge pump converts a 2.7V to 4.4V input to a boosted output, while the internal LDO regulator converts the boosted voltage to a low noise regulated output. The regulator is capable of supplying up to 30mA of output current. Shutdown reduces the supply current to <8µA, removes the load from VIN by disabling the regulator and discharges VOUT to ground through a 200 Ohms switch.

The LTC1928-5 LDO regulator is stable with only 2µF on the output. Small ceramic capacitors can be used, reducing PC board area.

The LTC1928-5 is short-circuit and overtemperature protected. The part is available in a 6-pin low profile (1mm) ThinSOT package.

Features Low Output Noise: 90µVRMS (100kHz BW) Low Profile (1mm) ThinSOT™ Package Fixed Output Voltage: 5V Input Voltage Range: 2.7V to 4.4V Uses Small Ceramic Capacitors No Inductors Required Output Current Up to 30mA 550kHz Switching Frequency Low Operating Current: 190µA Low Shutdown Current: 4µA Internal Thermal Shutdown and Current Limiting Typical Application

Applications VCO Power Supplies for Cellular Phones 2-Way Pagers Wireless PCMCIA Cards Portable Medical Instruments Low Power Data Acquisition Remote Transmitters White LED Driver GaAs Switches Packaging

Order Information

Demo Boards