MAX8582

Obsolete

2.5MHz/1.5MHz Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power

Overall Smallest Solution 1.5MHz Step-Down DC-DC Converters Deliver 600mA with Up to 94% Efficiency in a Small TDFN Package

Data Sheet (Rev. 1) Product Selection Table

Part Models: 1
1ku List Price: price unavailable

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Overview

600mA Step-Down Converter
60mΩ (typ) Bypass Mode with Integrated FET
Dynamically Adjustable Output from 0.4V to V_IN
2.5MHz and 1.5MHz Switching Frequency
Small LC Components: 1.5µH to 3.3µH and 2.2µF
Up to 94% Efficiency
Low Output Ripple at All Loads
2.7V to 5.5V Input
0.1µA Shutdown Mode
Output Short-Circuit Protection
Thermal Shutdown
10-Pin, 3mm x 3mm TDFN Packages

The MAX8581/MAX8582 high-frequency step-down converters are optimized for dynamically powering the power amplifier (PA) in CDMA handsets. They integrate a high-efficiency PWM step-down converter for medium- and low-power transmission and a 60mΩ (typ) bypass mode to power the PA directly from the battery during high-power transmission. They use an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. The MAX8581/MAX8582 use an internal feedback network, and the switching frequency is internally set to 2.5MHz and 1.5MHz, respectively.

Fast switching (up to 2.5MHz) and fast soft-start allowthe use of ceramic 2.2µF input and output capacitors while maintaining low voltage ripple. The small 1.5µH to 3.3µH inductor size can be optimized for efficiency.

The MAX8581/MAX8582 are available in 10-pin, 3mm x3mm TDFN packages (0.8mm max height).

Applications

WCDMA/NCDMA Cell Phones
Wireless PDAs, Smartphones

Part Models: 1
1ku List Price: price unavailable

Documentation

Data Sheet 1

MAX8581-MAX8582: 2.5MHz/1.5MHz Step-Down Converters with 60mΩ Bypass in TDFN for CDMA PA Power Data Sheet (Rev.1) 03/05/2007

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
MAX8582ETB+	Thin Dual Flatpack No Leads, Exposed Pad	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 2
MAX1921	PRODUCTION	Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23
MAX1920	PRODUCTION	Low-Voltage, 400mA Step-Down DC-DC Converters in SOT23

Evaluation Kits

MAX8582 Evaluation Kit

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Features and Benefits

600mA Step-Down Converter
60mΩ (typ) Bypass Mode with Integrated MOSFET
Dynamically Adjustable Output from 0.4V to V_IN
Up to 94% Efficiency
Low Output Ripple at All Loads
2.7V to 5.5V Input-Voltage Range
0.1µA Shutdown Mode
Output Short-Circuit Protection
Thermal-Shutdown Protection
10-Pin, 3mm x 3mm, TDFN Package

Product Details

The MAX8582 evaluation kit (EV kit) evaluates the MAX8582 1.5MHz pulse-width modulated (PWM) step-down DC-DC converter. The circuit is optimized for powering power amplifiers (PAs) in wireless applications. The MAX8582 EV kit output voltage is adjustable from 0.4V to V_IN using the REFIN input and can deliver 600mA of load current in low-power mode. In high-power mode the output is shorted to the input by an internal MOSFET. The MAX8582 EV kit can also evaluate the MAX8581. To evaluate the MAX8581, order a free sample along with this EV kit.