Linear Technology LT3437 High Voltage Step-Down Switching Regulator Datasheet

The LT3437 is a high voltage 500mA, 200kHz step-down switching regulator with 100µA quiescent current, suitable for various applications.

Brand: Linear Technology
Category: Power Management
Document type: Datasheet
Language: English
Pages: 24
File format: PDF
File size: 508 KB
Published: 06 August, 2012
Updated: 29 September, 2023
Model: LT3437
MD5 checksum: 67E1884C5FA55CE36A08B963E2ABCB66
PDF: Linear Technology LT3437 High Voltage Step-Down Switching Regulator Datasheet PDF

About this manual

The LT3437 is a high voltage 500mA, 200kHz step-down switching regulator featuring a saturating switch design with 0.8Ω on-resistance. It accepts input voltages up to 80V and includes load dump protection to 80V. The device operates in Burst Mode to achieve 100µA quiescent current at light loads, which can be defeated for lower ripple.

What's inside

Features
Applications
Description
Absolute Maximum Ratings
Package/Order Information
Electrical Characteristics
Typical Performance Characteristics

Specifications

Switching Frequency	200kHz
Peak Switch Current	500mA
Input Voltage Range	3.3V to 60V
Load Dump Protection	80V
Quiescent Current	100µA
On-Resistance	0.8Ω
Feedback Reference Voltage	1.25V
Package Type	10-Pin Thermally Enhanced DFN

Frequently asked questions

What is the maximum input voltage?

The regulator accepts input voltages up to 80V.

What is the quiescent current in Burst Mode?

The quiescent current is 100µA in Burst Mode operation.

Can the switching frequency be synchronized?

Yes, external synchronization can be implemented by driving the SYNC pin.

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