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MAX5088

2.2MHz, 2A Buck Converters with an Integrated High-Side Switch

Up to 2.2MHz Switching Frequency Prevents Harmonics from Interfering in the ADSL2+ and Automotive AM Radio Frequency Bands

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Overview

Description

The MAX5088/MAX5089 high-frequency, DC-DC converters with an integrated n-channel power MOSFET provide up to 2A of load current. The MAX5088 includes an internal power MOSFET to enable the design of a nonsynchronous buck topology power supply. The MAX5089 is for the design of a synchronous buck topology power supply. These devices operate from a 4.5V to 5.5V or 5.5V to 23V input voltage and a 200kHz to 2.2MHz resistor-programmable switching frequency. The voltage-mode architecture with a peak switch current-limit scheme provides stable operation up to a 2.2MHz switching frequency. The MAX5088 includes a clock output for driving a second DC-DC converter 180° out-of-phase and a power-on-reset (RESET-bar) output. The MAX5089 includes a power-good output and a synchronous rectifier driver to drive an external low-side MOSFET in the buck converter configuration for high efficiency.

The MAX5088/MAX5089 protect against overcurrent conditions by utilizing a peak current limit as well as overtemperature shutdown providing a very reliable and compact power source for point-of-load regulation applications. Additional features include synchronization, internal digital soft-start, and an enable input. The MAX5088/MAX5089 are available in a thermally enhanced, space-saving 16-pin TQFN (5mm x 5mm) package and operate over the -40°C to +125°C temperature range.

MAX5088, MAX5089: Typical Application Circuit

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Key Features

4.5V to 5.5V or 5.5V to 23V Input Voltage Range
Output Voltage Adjustable Down to 0.6V
2A Output Current
Synchronous Rectifier Driver Output (MAX5089) for Higher Efficiency
Resistor-Programmable Switching Frequency from 200kHz to 2.2MHz
External Synchronization and Enable (On/Off) Inputs
Clock Output for Driving Second Converter 180° Out-Of-Phase (MAX5089)
Integrated 150mΩ High-Side n-Channel Power MOSFET
Power-On Reset Output (MAX5088)/Power-Good Output (MAX5089)
Short-Circuit Protection
Thermal-Shutdown Protection
Thermally Enhanced 16-Pin TQFN Package Dissipates 2.7W

Applications/Uses

Automotive Radio Power Supply
IP Phones/WLAN Access Points
Servers and Networks
xDSL Modem Power Supply

Design Resources

Quality and Environmental Data

Product Reliability Reports: MAX5088.pdf
Lead-Free Package Tin (Sn) Whisker Reports

Quality And Environmental

Device	Fab Process	Technology	Sample size	Rejects	FIT at 25°C	FIT at 55°C

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >

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