LM3206 Datasheet, PDF (1/16 Pages) National Semiconductor (TI) – 650mA Miniature, Step-Down DC-DC Converter for Portable Applications

October 2006
LM3206
650mA Miniature, Step-Down DC-DC Converter for
Portable Applications
General Description
The LM3206 is a DC-DC converter optimized for powering
portable applications from a single Lithium-Ion cell, however
they may be used in many other applications. It steps down
an input voltage from 3.25V to 5.5V to a fixed output voltage
of 3.09V.
The LM3206 offers superior performance for mobile phones
and other applications requiring low dropout voltage. Fixed-
frequency PWM operation minimizes RF interference. The
Shutdown function turns the device off and reduces battery
consumption to 0.01 µA (typ.).
The LM3206 is available in an 8-pin lead free micro SMD
package. A high switching frequency (2 MHz) allows use of
tiny surface-mount components. Only three small external
surface-mount components, an inductor and two ceramic ca-
pacitors are required.
Features
■ ^{2 MHz (typ.) PWM Switching Frequency}
■ ^{Operates from a single Li-Ion cell}
■ ^{Fixed Output Voltage (3.09V)}
■ ^{650mA Maximum load capability}
■ ^{High Efficiency (96% Typ at 3.6V}_IN^{, 3.09V}_OUT ^{at 400mA)}
from internal synchronous rectification
■ ^{8-pin micro SMD Package}
■ ^{Current Overload Protection}
■ ^{Thermal Overload Protection}
■ ^{Soft Start function}
■ ^{Low Dropout Voltage (140 mΩ Typ PFET)}
Applications
■ ^{Cellular Phones}
■ ^{Hand-Held Radios}
■ ^{RF PC Cards}
■ ^{Battery Powered RF Devices}
■ ^{RFIC Chipsets}
Typical Application
FIGURE 1. LM3206 Typical Application
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