LM3203 Step-Down DC-DC Converter

LM3203 Step-Down DC-DC Converter

The LM3203 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 of 2.7V to 5.5V to an adjustable output voltage of 0.8V to 3.6V. The output voltage is set using a VCO.

Features

n n n n n n n n n n n 2MHz (typ.) PWM Switching Frequency Operates from a single Li-Ion cell (2.7V to 5.5V) Adjustable Output Voltage (0.8V to 3.6V) 500mA Maximum load capability (PWM and Bypass mode) PWM / Forced Bypass Mode Low RDSON Bypass FET: 85mΩ (typ.) High Efficiency (96% typ. at 3.6VIN, 3.2VOUT at 150mA) Fast Turn-on time when Enabled (50µs typ.), 3GPP Compliant 10-pin micro SMD Package Current Overload Protection Thermal Overload Protection Applications n n n n Cellular Phones Hand-Held Radios RF PC Cards Battery Powered RF Devices Typical Application 20141601 © 2005 National Sem.