LM3205 Datasheet | Texas Instruments

FEATURES - 2 2 MHz (typ.) PWM Switching Frequency - Operates from a Single Li-Ion Cell (2.7V to 5.5V) - Variable Output Voltage (0.8V to 3.6V) - Fast Output Voltage Transient (0.8V to 3.6V in 20µs) - 650m A Maximum Load Capability - High Efficiency (96% Typ at 4.2VIN, 3.4VOUT at 400m A) from Internal Synchronous Rectification - Current Overload Protection - Thermal Overload Protection - Packages - 8-Pin DSBGA (Lead Free) - 10-Pin WSON APPLICATIONS - Cellular Phones - Hand-Held Radios - RF PC Cards - Battery Powered RF Devices DESCRIPTION The LM3205 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell, however they may be used in many other applications. It steps down an input voltage from 2.7V to 5.5V to a variable output voltage from 0.8V(typ.) to 3.6V(typ.). Output voltage is set using a VCON analog input for controlling power levels and efficiency of the RF PA. The LM3205 offers superior performance for mobile phones and similar RF PA applications. Fixedfrequency PWM operation minimizes RF interference. Shutdown function turns the device off and reduces battery consumption to 0.01 µA (typ.). The LM3205 is available in DSBGA package and WSON package. For all other package options contact your local TI sales office. A high switching frequency (2 MHz) allows use of tiny surface-mount ponents. Only three small external surface-mount ponents, an inductor and two ceramic capacitors are required. TYPICAL APPLICATION VIN 2.7V to 5.5V 10 PF PVIN EN VDD SW VCON PGND SGND 3.3 PH VOUT 0.8V to 3.6V VOUT = 2.5 x VCON 4.7 PF Figure 1. LM3205 Typical Application Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective...