LM3200 Datasheet | National Semiconductor

Description The LM3200 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 a variable 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 LM3200 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. LM3200 has both forced and automatic bypass modes. Shutdown mode turns the device off and reduces battery consumption to 0.1 µA (typ.). The LM3200 is available in a 10-pin lead free micro SMD package. 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. Features n 2 MHz (typ.) PWM Switching Frequency n Operates from a single Li-Ion cell (2.7V to 5.5V) n Variable Output Voltage (0.8V to 3.6V) n 300 m A Maximum load capability (PWM mode) n 500 m A Maximum load capability (Bypass mode) n PWM, Forced and Automatic Bypass Mode n High Efficiency (96% Typ at 3.6VIN, 3.2VOUT at 120 m A) from internal synchronous rectification n 10-pin micro SMD Package n Current Overload Protection n Thermal Overload Protection Applications n Cellular Phones n Hand-Held Radios n RF PC Cards n Battery Powered RF Devices Typical Application © 2005 National Semiconductor Corporation DS201261 .national. Connection Diagrams Top View Bottom View 10- Bump Thin Micro SMD Package, Large Bump See NS Package Number TLP10NHA Order Information Order Number Package Marking (Note) Supplied As LM3200TL XYTT SCUB 250 Units, Tape and Reel LM3200TLX XYTT SCUB 3000 Units, Tape and Reel Note: The package marking “XY” designates the date code. “TT” is a NSC internal...