Linear Technology LT1738 Slew Rate Controlled Ultralow Noise DC/DC Controller Datasheet

About this manual

The LT1738 controller provides independent control of output switch voltage and current slew rates, greatly reducing conducted and radiated EMI. It includes a single N‑channel MOSFET driver, a wide oscillator frequency range (20 kHz‑250 kHz), and can regulate both positive and negative output voltages.

Typical applications include noise‑sensitive communication equipment, precision instrumentation, medical devices, and isolated supplies for industrial automation. The device offers extensive protection features such as soft‑start, over‑current limiting, gate‑drive lockout, and input undervoltage lockout.

What's inside

• Features
• Applications
• Description
• Absolute Maximum Ratings
• Electrical Characteristics
• Typical Performance Characteristics
• Pin Functions
• Test Circuits
• Application Information
• Package Description

Specifications

Frequently asked questions

What does the V5 pin provide?

The V5 pin supplies a 5 V output that can sink or source up to 10 mA for external components.

How can the oscillator be synchronized to an external clock?

By connecting the external clock to the SYNC pin, the part can lock its oscillator frequency to the external reference.

What is the maximum switch frequency of the LT1738?

The controller can operate up to a maximum switch frequency of 250 kHz.

What protection features are included in the LT1738?

It includes soft‑start, output current limit, short‑circuit current limiting, gate‑drive over‑voltage clamp, and input supply undervoltage lockout.