特点
Low Noise Constant Frequency Operation
Output Current: 100mA
Fixed 5V ±4% Output (LTC3200-5) or ADJ
VIN Range: 2.7V to 4.5V
Automatic Soft-Start Reduces Inrush Current
2MHz Switching Frequency
No Inductors
ICC < 1μA in Shutdown
Available in 8-Pin MSOP (LTC3200) and Low Profile (1mm) 6-Pin ThinSOT? (LTC3200-5) Packages
典型应用
典型应用
描述
The LTC ? 3200/LTC3200-5 are low noise, constant frequency switched capacitor voltage doublers. They produce a regulated output voltage from a 2.7V to 4.5V input with up to 100mA of output current. Low external parts count (one flying capacitor and two small bypass capacitors at V IN and V OUT ) make the LTC3200/LTC3200-5 ideally suited for small, battery-powered applications.
A new charge-pump architecture maintains constant switching frequency to zero load and reduces bith output and input ripple. The LTC3200/LTC3200-5 have thermal shutdown capability and can survive a continuous short-circuit from V OUT to GND. Built-in soft-start circuitry prevents excessive inrush curreent during start-up.
High switching frequency enables the use of small ceramic capacitors. A low current shutdown feature disconnects the load from VIN and reduces quiescent current to <1μA.
The LTC3200 is available in an 8-pin MSOP package and the LTC3200-5 is available in a 6-pin SOT-23.