特点
Low Output Noise: 90μV
RMS
(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
典型应用
典型应用
描述
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 V IN by disabling the regulator and discharges V OUT 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.