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2022-09-24 23:33:15
LTC3202 - Low Noise, High Efficiency White LED Charge Pump
The LTC®3202 is a low noise, constant frequency charge pump DC/DC converter that uses fractional conversion to improve efficiency in white LED applications. The section can be used to generate a regulated voltage or current of up to 125mA from a 2.7V to 4.5V input. The low external component count (two floating capacitors and two small bypass capacitors VIN and VOUT) makes the LTC3202 ideal for small, battery powered applications. Allows LED current to be adjusted, and an internal 2-bit DAC controls LED brightness. The LTC3202 also features thermal shutdown protection and survives a continuous short circuit from VOUT and GND. A built-in soft-start circuit prevents excessive inrush current during startup. The high switching frequency allows the use of small external capacitors. A low current shutdown function disconnects the load from VIN and reduces quiescent current down to than1mA. The LTC3202 is available in 10-lead MSOP and 3mm" 3mm DFN packages.