The LT ®1976/LT1976B are 200kHz monolithic step-down switching regulators that accept input voltages up to 60V.
The LT1976 and LT1976B are monolithic step‑down switching regulators offering a wide input voltage range of 3.3 V to 60 V and up to 1.5 A peak switch current. They feature low quiescent current (100 µA for LT1976, 1.6 mA for LT1976B), a 200 kHz switching frequency, and built‑in protection such as load‑dump and shutdown control. The devices are supplied in a 16‑lead plastic TSSOP package with an exposed pad for thermal management.
Typical applications include automotive, industrial, and battery‑powered systems where efficient voltage conversion from 14 V or 42 V down to 3.3 V is required. The datasheet includes absolute maximum ratings, detailed electrical characteristics, pin descriptions, and typical performance curves to aid designers in implementing the regulators.
| Input Voltage Range | 3.3 V to 60 V |
|---|---|
| Peak Switch Current (LT1976) | 1.5 A |
| Quiescent Current (LT1976) | 100 µA |
| Quiescent Current (LT1976B) | 1.6 mA |
| Switching Frequency | 200 kHz |
| Maximum Duty Cycle | 92 % |
| Operating Temperature Range | -40 °C to 125 °C |
| Package | 16‑lead plastic TSSOP |
The LT1976 operates at a switching frequency of 200 kHz.
The LT1976B has a quiescent current of 1.6 mA.
The LT1976 is supplied in a 16‑lead plastic TSSOP package with an exposed pad.