LP3852/LP3855 1.5A Fast Response Ultra Low Dropout Linear Regulators
The LP3852/LP3855 series are fast, ultra‑low dropout linear regulators that operate from a 2.5 V to 7.0 V input and deliver up to 1.5 A. They are designed for low‑voltage microprocessor power supplies and other battery‑powered applications.
Key features include ultra‑low dropout voltage, low ground‑pin current, shutdown current as low as 10 nA, error‑flag output, and selectable output voltages from 1.8 V to 5.0 V. The datasheet lists pin functions, package options (TO‑220, TO‑263, SOT‑223), electrical characteristics, and typical application circuits.
| Dropout Voltage (150 mA) | 24 mV |
|---|---|
| Dropout Voltage (1.5 A) | 240 mV |
| Ground Pin Current (1.5 A load) | 4 mA |
| Shutdown Current | 10 nA |
| Output Voltage Accuracy | ±1.5 % (room temperature) |
| Load Regulation | 0.06 % |
| Operating Temperature Range | -40 °C to +125 °C |
| Available Output Voltages | 1.8 V to 5.0 V |
The typical dropout voltage at 150 mA is 24 mV.
At a 1.5 A load the dropout voltage is typically 240 mV.
The shutdown pin draws about 10 nA of quiescent current.
The ground pin current is typically 4 mA when delivering 1.5 A.