LTC3200 Datasheet | Linear Technology

.. LTC3200/LTC3200-5 Low Noise, Regulated Charge Pump DC/DC Converters Features s s s DESCRIPTIO s s s s s s U APPLICATIO S s s s s s Low Noise Constant Frequency Operation Output Current: 100m A Available in 8-Pin MSOP (LTC3200) and Low Profile (1mm) 6-Pin Thin SOTTM (LTC3200-5) Packages 2MHz Switching Frequency Fixed 5V ± 4% Output (LTC3200-5) or ADJ VIN Range: 2.7V to 4.5V Automatic Soft-Start Reduces Inrush Current No Inductors ICC <1µA in Shutdown 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 100m A of output current. Low external parts count (one flying capacitor and two small bypass capacitors at VIN and VOUT) 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 both output and input ripple. The LTC3200/LTC3200-5 have thermal shutdown capability and can survive a continuous shortcircuit from VOUT to GND. Built-in soft-start circuitry prevents excessive inrush current 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 Thin SOT. , LTC and LT are registered trademarks of Linear Technology Corporation. Thin SOT is a trademark of Linear Technology Corporation. White LED Backlighting Li-Ion Battery Backup Supplies Local 3V to 5V Conversion Smart Card Readers PCMCIA Local 5V Supplies TYPICAL APPLICATIO Output Ripple Voltage vs Load Current Regulated 5V Output from a 2.7V to 4.5V Input 1µF OUTPUT RIPPLE (m VP-P) VIN = 3V CFLY = 1µF TA = 25°C 30 COUT = 1µF 20 COUT = 2.2µF 10 VIN 2.7V TO 4.5V 1µF 5 2 3 C+ C- LTC3200-5 VIN GND SHDN VOUT 1 1µF VOUT = 5V ±4% IOUT...