MAXIM MAX1843 2.7A Step-Down Regulator Datasheet

The MAX1843 is a 2.7A, 1MHz, low-voltage, step-down regulator with internal synchronous rectification in QFN package

Brand: Maxim
Category: Power Management
Document type: Datasheet
Language: English
Pages: 14
File format: PDF
File size: 298 KB
Published: 05 June, 2012
Updated: 30 September, 2023
MD5 checksum: D90A4F2B2EA583B3F1ECB75946303C12
PDF: MAXIM MAX1843 2.7A Step-Down Regulator Datasheet PDF

About this manual

The MAX1843 is a constant-off-time, pulse-width modulated (PWM) step-down DC-DC converter designed for use in 5V and 3.3V to low-voltage conversion applications found in notebook and subnotebook computers. It features an internal PMOS power switch and internal synchronous rectification, eliminating the need for an external Schottky diode. The device achieves efficiencies as high as 95% and delivers continuous load currents up to 2.7A.

What's inside

General Description
Applications
Features
Ordering Information
Pin Configuration
Absolute Maximum Ratings
Electrical Characteristics
Typical Operating Characteristics

Specifications

Output Current	2.7A continuous
Switching Frequency	Up to 1MHz
Efficiency	95%
Input Voltage Range	+3V to +5.5V
Output Voltage Options	+2.5V, +1.8V, or +1.5V Pin Selectable; Adjustable from +1.1V to VIN
Package Type	28-Pin QFN with exposed backside pad

Frequently asked questions

What are the preset output voltage options?

The device produces preset outputs of +2.5V, +1.8V, or +1.5V.

Is an external Schottky diode required?

No, the device features internal synchronous rectification so an external Schottky diode is not required.

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