LT1610

LT1610 1.7MHz, Single Cell Micropower DC/DC Converter FEATURES s s s s s s s s s s s DESCRIPTIO Uses Tiny Capacitors and Inductor Internally Compensated Low Quiescent Current: 30µA Operates with VIN as Low as 1V 3V at 30mA from a Single Cell 5V at 200mA from 3.3V High Output Voltage Capability: Up to 28V Low Shutdown Current: < 1µA Automatic Burst ModeTM Switching at Light Load Low VCESAT Switch: 300mV at 300mA 8-Lead MSOP and SO Packages The LT®1610 is a micropower fixed frequency DC/DC converter that operates from an input voltage as low as 1V. Intended for small, low power applications, it switches at 1.7MHz, allowing the use of tiny capacitors and inductors. The device can generate 3V at 30mA from a single cell (1V) supply. An internal compensation network can be connected to the LT1610’s VC pin, eliminating two external components. No-load quiescent current of the LT1610 is 30µA, and the internal NPN power switch handles a 300mA current with a voltage drop of 300mV. The LT1610 is available in 8-lead MSOP and SO packages. U APPLICATIO S s s s s s Pagers Cordless Phones Battery Backup LCD Bias Portable Electronic Equipment , LTC and LT are registered trademarks of Linear Technology Corporation. Burst Mode is a trademark of Linear Technology Corporation. TYPICAL APPLICATIO L1 4.7µH D1 VOUT 3V 30mA R1 1M 85 VOUT = 3V 80 VIN = 1.25V 75 VIN = 1.5V 6 VIN 3 5 SW FB LT1610 2 + 1 CELL C1 22µF 8 R2 681k GND 7 + C2 22µF EFFICIENCY (%) SHDN 70 65 60 55 COMP VC ...