LM3253
www.ti.com SNVS791Q – FEBRUARY 2012 – REVISED MAY 2013 LM3253 High-Current Step-Down Converter for 2G/3G/4G RF Power Amplifiers
Check for Samples: LM3253 FEATURES 1 2 High-Efficiency PFM and PWM Modes with
Internal Synchronous Rectification
Analog Bypass Function with Low Dropout
Resistance (45 mΩ typ.)
Dynamically Adjustable Output Voltage, 0.4V
to 3.6V (typ.), in PFM and PWM modes
3A Maximum Load Current in PWM Mode
2.7MHz (average) PWM Switching Frequency
Modulated Switching Frequency to Aid Rx
Band Compliance
Operates From a Single Li-ion Cell
(2.7V to 5.5V)
ACB Reduces Inductor Requirements and Size
Minimum Total Solution Size by Using Small
Footprint and Case Size Inductor and
Capacitors
16-bump Thin DSBGA Package
Current and Thermal Overload Protection APPLICATIONS USB Datacards
Cellular Phones
Hand-Held Radios
RF PC Cards …
