The LT1158 is a half-bridge N-channel power MOSFET driver that operates at supply voltages from 5V to 30V. Its features include fast transition times, continuous current limit protection, auto shutdown and retry capability, internal charge pump for DC operation, built-in gate voltage protection, compatibility with current-sensing MOSFETs, and fault output indication.
This handbook describes the LT1158 half‑bridge N‑channel power MOSFET driver, including its operating voltage range, adaptive non‑overlap gate drives, continuous current‑limit protection, and built‑in charge‑pump for DC operation. Pin assignments, electrical characteristics, and absolute maximum ratings are listed in detail.
Typical applications such as motor control, synchronous step‑down regulators, and high‑current transducer drivers are illustrated, and design notes on MOSFET selection, parallel operation, and low‑voltage performance are provided.
| Supply Voltage (V+) | 5 V – 30 V |
|---|---|
| Peak Driver Current | 500 mA |
| Gate‑to‑Source Voltage Protection | 14.5 V |
| Input Levels | TTL/CMOS |
| Input Threshold Voltage | 0.8 V – 1.4 V |
The LT1158 can be powered from 5 V up to 30 V.
It can source up to 500 mA of peak driver current.
Yes, the device contains an internal charge pump for DC operation.
The input threshold voltage is typically between 0.8 V and 1.4 V.