LM3253EVM/NOPB

LM3253 DC to DC Converter and Switching Regulator Chip 0.4VDC to 3.6VDC Output Evaluation Board

The LM3253 is a DC-DC converter optimized for powering multi-mode 2G/3G/4G RF power amplifiers PAs from a single Lithium-Ion cell. The LM3253 steps down an input voltage from 2.7V to 5.5V to a dynamically adjustable output voltage of 0.4V to 3.6V. The output voltage is set through a VCON analog input that adjusts the output voltage to ensure efficient operation at all power levels of the RF PA. The LM3253 is optimized for USB datacard applications.

The LM3253 operates in constant frequency PWM mode producing a small and predictable amount of output voltage ripple. This enables best ECTEL power requirements in GMSK and EDGE spectral compliance, with the minimal amount of filtering and excess headroom.