MAX738A

PRODUCTION

5V, Step-Down, Current-Mode PWM DC-DC Converters

We Recommend Improved Performance Devices, MAX1684/MAX1685, for New Designs

Data Sheet (Rev. 2) Product Selection Table

Part Models: 7
1ku List Price: Starting From $4.62

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Overview

750mA Load Currents (MAX738A/MAX744A)
High-Frequency, Current-Mode PWM
159kHz to 212.5kHz Guaranteed Oscillator Frequency Limits (MAX744A)
85% to 96% Efficiencies
1.7mA Quiescent Current
6µA Shutdown Supply Current
Single Preselected Inductor Value, No Component Design Required
Overcurrent, Soft-Start, and Undervoltage Lockout Protection
Cycle-by-Cycle Current Limiting
8-Pin DIP/SO Packages (MAX730A)

The MAX730A/MAX738A/MAX744A are 5V-output CMOS, step-down switching regulators. The MAX738A/MAX744A accept inputs from 6V to 16V and deliver 750mA. The MAX744A guarantees 500mA load capability for inputs above 6V and has tighter oscillator frequency limits for low-noise (radio) applications. The MAX730A accepts inputs between 5.2V and 11V and delivers 450mA for inputs above 6V. Typical efficiencies are 85% to 96%. Quiescent supply current is 1.7mA and only 6µA in shutdown.

Pulse-width modulation (PWM) current-mode control provides precise output regulation and excellent transient responses. Output voltage accuracy is guaranteed to be ±5% over line, load, and temperature variations. Fixed-frequency switching allows easy filtering of output ripple and noise, as well as the use of small external components. These regulators require only a single inductor value to work in most applications, so no inductor design is necessary.

The MAX730A/MAX738A/MAX744A also feature cycle-by-cycle current limiting, overcurrent limiting, undervoltage lockout, and programmable soft-start protection.

Applications

Cell Phones
Computer Peripherals
Distributed Power Systems
Personal Communicators
Portable Instrumentation

Part Models: 7
1ku List Price: Starting From $4.62

Documentation

Data Sheet 2

MAX730A-MAX744A: 5V, Step-Down, Current-Mode PWM DC-DC Converters Data Sheet (Rev.2) 01/01/1996

MAX738A 10/10/2022

Reliability Data 1

MAX738A Reliability Data 01/12/2023

ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.

Part Model	Pin/Package Drawing	Documentation	CAD Symbols, Footprints, and 3D Models
MAX738ACPA+	8-PDIP-300_MIL	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX738ACWE+	Small-Outline IC, Wide (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX738ACWE+T	Small-Outline IC, Wide (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX738AEPA+	8-PDIP-300_MIL	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX738AEWE+	Small-Outline IC, Wide (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX738AEWE+T	Small-Outline IC, Wide (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX738AMJA/883B	Ceramic Dual-In-Line, Narrow (0.3in)	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

This is the most up-to-date revision of the Data Sheet.

Software Resources

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Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 1
MAX1684	PRODUCTION	Low-Noise, 14V Input, 1A, PWM Step-Down Converters

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