LM3218 Datasheet Step-down DC-dc Converter

Manufacturer: National Semiconductor (now Texas Instruments)

Overview: LM3218 650 mA Miniature, Adjustable, Step-Down DC-DC Converter with Integrated Inductor for RF Power Amplifiers January 21, 2009 LM3218 650 mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power.

Datasheet Details

Part number	LM3218
Manufacturer	National Semiconductor (now Texas Instruments)
File Size	4.22 MB
Description	Step-Down DC-DC Converter
Datasheet	LM3218_NationalSemiconductor.pdf

General Description

The LM3218 is a DC-DC converter with inductor which is optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell.

It steps down an input voltage in the range from 2.7V to 5.5V to an adjustable output voltage of 0.8V to 3.6V.

Output voltage is set by using a VCON analog input to control power levels and efficiency of the RF PA.

Key Features

Includes 2.6 µH Inductor in very small form factor (3mm x.
2.5mm x 1.2mm) 2 MHz (typ. ) PWM Switching Frequency Operates from a single Li-Ion cell (2.7V to 5.5V) Adjustable Output Voltage (0.8V to 3.6V) Fast Output Voltage Transient (0.8V to 3.4V in 25 µs typ. ) 650 mA Maximum load capability High Efficiency (95% typ. at 3.9 VIN, 3.4 VOUT at 400 mA) 8-pin LTCC Package Current Overload Protection Thermal Overload Protection.

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More Datasheets from National Semiconductor (now Texas Instruments)

Part Number	Description
LM321	Low Power Single Op Amp
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LM320	3-Terminal Negative Regulators
LM3200	Step-Down DC-DC Converter
LM3203	Step-Down DC-DC Converter
LM3204	Step-Down DC-DC Converter
LM3207	Step-Down DC-DC Converter
LM3208	Step-Down DC-DC Converter
LM320L	3-Terminal Negative Regulators
LM322	Precision Timers