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LM3202 Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM3202 Datasheet(HTML) 1 Page - National Semiconductor (TI) |
1 / 15 page LM3202 650mA Miniature, Adjustable, Step-Down DC-DC Converter for RF Power Amplifiers General Description The LM3202 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 1.3V to 3.16V. Output voltage is set using a V CON analog input for controlling power levels and efficiency of the RF PA. The LM3202 offers superior performance for mobile phones and similar RF PA applications. Fixed-frequency PWM op- eration minimizes RF interference. Shutdown function turns the device off and reduces battery consumption to 0.01 µA (typ.). The LM3202 is available in a 8-pin lead free micro SMD package. A high switching frequency (2 MHz) allows use of tiny surface-mount components. Only three small external surface-mount components, 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 (1.3V to 3.16V) n Fast Output Voltage Transient (1.3V to 3.16V in 20µs) n 650mA Maximum load capability n High Efficiency (96% Typ at 3.6V IN, 3.16VOUT at 400mA) from internal synchronous rectification n 8-pin micro SMD Package n Current Overload Protection n Thermal Overload Protection n Soft Start function Applications n Cellular Phones n Hand-Held Radios n RF PC Cards n Battery Powered RF Devices Typical Application 20141501 FIGURE 1. LM3202 Typical Application October 2005 © 2005 National Semiconductor Corporation DS201415 www.national.com |
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