MAX5081

PRODUCTION

1A, 40V, MAXPower Step-Down DC-DC Converters

Data Sheet (Rev. 3) Product Selection Table

Part Models: 2
1ku List Price: Starting From $2.74

Viewing:

Overview

4.5V to 40V (MAX5080) or 7.5V to 40V (MAX5081) Input Voltage Range
1A Output Current
V_OUT Range From 1.23V to 32V
Internal High-Side Switch
Fixed 250kHz Internal Oscillator
Automatic Switchover to Pulse-Skip Mode at Light Loads
External Frequency Synchronization
Thermal Shutdown and Short-Circuit Protection
Operates Over the -40°C to +125°C Temperature Range
Space-Saving (5mm x 5mm) High-Power 16-Pin TQFN Package

The MAX5080/MAX5081 are 250kHz PWM step-down DC-DC converters with an on-chip, 0.3Ω high-side switch. The input voltage range is 4.5V to 40V for the MAX5080 and 7.5V to 40V for the MAX5081. The output is adjustable from 1.23V to 32V and can deliver up to 1A of load current.

Both devices utilize a voltage-mode control scheme for good noise immunity in the high-voltage switching environment and offer external compensation allowing for maximum flexibility with a wide selection of inductor values and capacitor types. The switching frequency is internally fixed at 250kHz and can be synchronized to an external clock signal through the SYNC input. Light load efficiency is improved by automatically switching to a pulse-skip mode.

All devices include programmable undervoltage lockout and soft-start. Protection features include cycle-by-cycle current limit, hiccup-mode output short-circuit protection, and thermal shutdown. Both devices are available in a space-saving, high-power (2.7W), 16-pin TQFN package and are rated for operation over the -40°C to +125°C temperature range.

Applications

Automotive
Distributed Power
FireWire® Power Supplies
Industrial

Part Models: 2
1ku List Price: Starting From $2.74

Documentation

Data Sheet 1

MAX5080-MAX5081: 1A, 40V, MAXPower Step-Down DC-DC Converters Data Sheet (Rev.3) 04/09/2018

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
MAX5081ATE+	16-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys
MAX5081ATE+T	16-LFCSP-5X5X0.75	Material Declaration Reliablity Data Package Resources	Ultra Librarian SamacSys

Part Models	Product Lifecycle	PCN

Jun 20, 2016 - 1612 ASSEMBLY
		pcn_1612
MAX5081ATE+	PRODUCTION
MAX5081ATE+T	PRODUCTION

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

Software Resources

Can't find the software or driver you need?

Request a Driver/Software

Hardware Ecosystem

Parts	Product Life Cycle	Description
Switching Regulators & Controllers 2
MAX5082	PRODUCTION	1.5A, 40V, MAXPower Step-Down DC-DC Converters
MAX5083	PRODUCTION	1.5A, 40V, MAXPower Step-Down DC-DC Converters

Evaluation Kits

Evaluation Kit for the MAX5080, MAX5081, MAX5082, MAX5083

Buy Now View Details

Features and Benefits

4.5V to 40V Input Voltage Range

3.3V, 1A, 250kHz Step-Down Converter

Internal High-Side Switch

High Efficiency Up to 90%

Automatic PWM/PFM Mode

Power-On/Off Control Logic

Overcurrent and Thermal Protection

Automotive Operating Temperature Range

Tiny 5mm x 5mm, 16-Pin TQFN Package

Fully Assembled and Tested

Product Details

The MAX5080 evaluation kit (EV kit) is a fully assembled and tested circuit board that evaluates the MAX5080 PWM/PFM step-down converter IC with an integrated high-side switch. The MAX5080 EV kit operates over a wide 4.5V to 40V input voltage range and provides up to 1A at the 3.3V output.

The MAX5080 internal switching frequency is set to 250kHz. The MAX5080 normally operates as a PWM converter and automatically switches to PFM mode at light loads to improve efficiency. The MAX5080 features a SYNC input to provide external frequency synchronization for noise-sensitive applications. The EV kit features PC board pads to evaluate the SYNC and ON/OFF-bar features of the MAX5080. The MAX5080 can operate over the automotive -40°C to +125°C temperature range. The MAX5080 step-down converter is suitable for FireWire®, automotive, and point-of-load applications.