LT1613 Datasheet | Linear Technology

LT1613 1.4MHz, Single Cell DC/DC Converter in 5-Lead SOT-23 Features s s s s s s s s s s s DESCRIPTIO Uses Tiny Capacitors and Inductor Internally pensated Fixed Frequency 1.4MHz Operation Operates with VIN as Low as 1.1V 3V at 30m A from a Single Cell 5V at 200m A from 3.3V Input 15V at 60m A from Four Alkaline Cells High Output Voltage: Up to 34V Low Shutdown Current: <1µA Low VCESAT Switch: 300m V at 300m A Tiny 5-Lead SOT-23 Package U APPLICATIO S s s s s s s s s s The LT®1613 is the industry’s first 5-lead SOT-23 current mode DC/DC converter. Intended for small, low power applications, it operates from an input voltage as low as 1.1V and switches at 1.4MHz, allowing the use of tiny, low cost capacitors and inductors 2mm or less in height. Its small size and high switching frequency enables the plete DC/DC converter function to take up less than 0.2 square inches of PC board area. Multiple output power supplies can now use a separate regulator for each output voltage, replacing cumbersome quasi-regulated approaches using a single regulator and a custom transformer. A constant frequency, internally pensated current mode PWM architecture results in low, predictable output noise that is easy to filter. The high voltage switch on the LT1613 is rated at 36V, making the device ideal for boost converters up to 34V as well as for Single-Ended Primary Inductance Converter (SEPIC) and flyback designs. The device can generate 5V at up to 200m A from a 3.3V supply or 5V at 175m A from four alkaline cells in a SEPIC design. The LT1613 is available in the 5-lead SOT-23 package. , LTC and LT are registered trademarks of Linear Technology Corporation. Digital Cameras Pagers Cordless Phones Battery Backup LCD Bias Medical Diagnostic Equipment Local 5V or 12V Supply External Modems PC Cards TYPICAL APPLICATIO L1 4.7µH VIN 3.3V D1 VOUT 5V 200m A 100 95 90 EFFICIENCY (%) + VIN C1 15µF SHDN LT1613 SHDN GND R1 37.4k + C2 22µF 85 80 75 70 65 VIN = 1.5V VIN = 2.8V...