LM3207 Step-Down DC-DC Converter

National Semiconductor

Description

LM3207 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers April 2007 LM3207 650mA Miniature, Adjustable, Step-Down DC-DC.
The LM3207 is a DC-DC converter optimized for powering WCDMA / CDMA RF power amplifiers (PAs) from a single Lithium-Ion cell; however they may be used.

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Datasheet Specifications

Part number: LM3207
Manufacturer: National Semiconductor
File Size: 1.50 MB
Datasheet: LM3207_NationalSemiconductor.pdf
Description: Step-Down DC-DC Converter

Features

* 2MHz (typ. ) PWM Switching Frequency
* Operates from a single Li-Ion cell (2.7V to 5.5V)
* Variable Output Voltage (0.8V to 3.6V)
* 650mA Maximum load capability
* High Efficiency (95% Typ at 3.9VIN, 3.4VOUT at 400mA) from internal synchronous rectification
* Integrated Vref

Applications

* It steps down an input voltage from 2.7V to 5.5V to a variable output voltage from 0.8V(typ. ) to 3.6V(typ. ). Output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA. The LM3207 also provides a regulated reference voltage (Vref) required by linear RF

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LM3207 Step-Down DC-DC Converter National Semiconductor

National Semiconductor LM3207-like datasheet