FEATURES
s Low Noise Constant Frequency Operation s 2.7V to 5.5V Input Voltage Range s No Inductors s Typical Efficiency 25% Higher Than LDOs s Shutdown Disconnects Load from VIN s Output Voltage: 1.8V ±4% or 1.5V ±4% s Output Current: 250mA s Low Operating Current: IIN = 180µA Typ s Low Shutdown Current: IIN = 10µA Typ s Oscillator Frequency: 1.5MHz s Soft-Start Limits Inrush Current at Turn On s Short-Circuit and Overtemperature Protected s Available in an 8-Pin MSOP Package U APPLICATIO S s Handheld Computers s Cellular Phones s Smart Card Readers s Portable Electronic Equipment s Handheld Medical Instruments s Low Power DSP Supplies , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a registered trademark of Linear Technology Corporation. *U.S. Patent #6,438,005 DESCRIPTIO The LTC®1911 is a switched capacitor step-down DC/DC converter that produces a 1.5V or 1.8V regulated output from a 2.7V to 5.5V input. The part uses switched capacitor fractional conversion to achieve high efficiency over the entire input range.
Linear Technology
