LM3204 Datasheet | Texas Instruments

FEATURES - 2 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) - Fast Turn on time when Enabled (50µs Typ.), 3GPP pliant - 300m A Maximum load capability (PWM mode) - 500m A Maximum load capability (Bypass mode) - PWM, Forced and Automatic Bypass Mode - High Efficiency (96% Typ. at 3.6VIN, 3.2VOUT at 120m A) - 10-pin micro SMD Package - Current Overload Protection - Thermal Overload Protection APPLICATIONS - Cellular Phones - Hand-Held Radios - RF PC Cards - Battery Powered RF Devices DESCRIPTION The LM3204 is a DC-DC converter optimized for powering RF power amplifiers (PAs) from a single Lithium-Ion cell. 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 an analog input ( VCON) for optimizing efficiency of the RF PA at various power levels. The LM3204 offers superior features and performance for mobile phones and similar RF PA applications. Fixedfrequency PWM mode minimizes RF interference. Bypass mode turns on an internal bypass switch to power the PA directly from the battery. LM3204 has both forced and automatic bypass modes. Shutdown mode turns the device off and reduces battery consumption to 0.1µA (typ.). The LM3204 is available in a 10-pin lead free micro SMD package. A high switching frequency (2MHz) 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 C1 10 PF C4 0.1 PF VCON 0.267V to 1.20V PVIN VDD BYPOUT BYP LM3204 SW FB VCON PGND SGND L1 2.2 PH VOUT 0.8V to 3.6V VOUT = 3 x VCON C2 4.7 PF Connection Diagrams 10- Bump Thin Micro SMD Package, Large Bump. See NS Package Number...