LM3209-G3_15 Datasheet, PDF (1/22 Pages) Texas Instruments – LM3209-G3 Seamless-Transition Buck-Boost Converter for Battery-Powered 3G/4G RF Power Amplifiers

LM3209-G3
www.ti.com
SNVS626B – NOVEMBER 2009 – REVISED MARCH 2013
LM3209-G3 Seamless-Transition Buck-Boost Converter for Battery-Powered 3G/4G RF
Power Amplifiers
Check for Samples: LM3209-G3
FEATURES
1
•2 Operates From a Single Li-Ion Cell: 2.7V to
5.5V
• Adjustable Output Voltage: 0.6V to 4.2V
• 1A Maximum Load Capability for V_IN ≥ 3.2V,
V_OUT = 3.6V
• 2.4 MHz (typ.) Switching Frequency
• Seamless Buck-Boost Mode Transition
• Fast Output Voltage Transition: 0.8V to 4.0V in
20 µs
• High-Efficiency: 95% typ. at 3.7 V_IN, 3.5 V_OUT, at
300 mA
• Cycle-by-cycle Over-Current Limit
• Output Over-Voltage Clamp
• Internal Compensation
• 12-bump DSBGA Package
APPLICATIONS
• Battery-Powered 3G/4G RF PAs
• Cellular Phones
• Portable Hard Disk Drives
• PDAs
DESCRIPTION
The LM3209-G3 is buck-boost DC/DC converter
designed to generate output voltages above or below
a given input voltage. It is particularly suitable for
single-cell Li-ion batteries for portable applications.
The LM3209-G3 operates at a 2.4 MHz typical
switching frequency in full synchronous operation
providing seamless transitions between buck and
boost operating modes.
The power converter topology needs only one
external inductor and two capacitors. Five internal
power switches enable high overall efficiency.
The LM3209-G3 is internally compensated for buck
and boost modes of operation, thus providing an
optimal transient response.
The LM3209-G3 is available in an 12-bump lead-free
DSBGA package of size 2.0 mm x 2.5 mm x 0.6 mm.
TYPICAL APPLICATION CIRCUIT
2.2 PH
V_IN: 2.7V to 5.5V
10 PF
SW1
SW2
PVIN
VOUT
PVIN
FB
LM3209-G3
VCON
EN
V_OUT: 0.6V to 4.2V
RF PA
4.7 PF
SGND
PGND
DAC
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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