LTC3200 Datasheet

• Low Noise Constant Frequency Operation
• Output Current: 100mA
• Fixed 5V ±4% Output (LTC3200-5) or ADJ
• V_IN Range: 2.7V to 4.5V
• Automatic Soft-Start Reduces Inrush Current
• 2MHz Switching Frequency
• No Inductors
• I_CC < 1µA in Shutdown
• Available in 8-Pin MSOP (LTC3200) and Low Profile (1mm) 6-Pin ThinSOT^™ (LTC3200-5) Packages

• Li-Ion Battery Backup Supplies
• Local 3V to 5V Conversion
• Smart Card Readers
• PCMCIA Local 5V Supplies
• White LED Backlighting

The LTC3200/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 V_IN 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.