ADP3031 Datasheet | Analog Devices

.. PRELIMINARY TECHNICAL DATA a Preliminary Technical Data Features Up to 2 MHz PWM Frequency Fully Integrated 1.5 A Power Switch 3% Output Regulation Accuracy Adjustable Output Voltage from 3 V to 12 V Simple pensation Small Inductor and MLC Capacitors 90% Efficiency Under-voltage Lockout Shutdown APPLICATIONS TFT LCD Bias Supplies Portable Electronic Instruments Industrial/Instrumentation Equipment REF FB 2 gm 2 MHz PWM Boost Switching Regulator ADP3031 Functional Block Diagram P ERROR AMP 1 IN 6 ADP3031 BIAS F/F RAMP GEN PARATOR RT 7 OSC R Q S DRIVER 5 SW SD 3 GENERAL DESCRIPTION CURRENT SENSE AMPLIFIER 8 GND 4 PGND The ADP3031 is a high frequency, step-up DC-DC switching regulator capable of 12 V boosted output voltage in a space saving MSOP-8 package. It provides high efficiency, low-noise operation, and is easy to use. Capable of operating up to 2 MHz, the high switching frequency and PWM current mode architecture allow for excellent transient response, ease of noise filtering, and also small, costsaving external inductive and capacitive ponents. The current limit and the power switch are integrated pletely on chip. Capable of operating from 2.5 V to 5.5 V input, the ADP3031 is ideal for Thin-Film Transistor (TFT) Liquid Crystal Display (LCD) module applications, where local point-of-use power regulation is required. Featuring an adjustable output that supports voltages down to 3 V, the ADP3031 is ideal to generate today’s low voltage rails, delivering power efficiently, and simply with minimal printed circuit board area. The device is specified over the industrial temperature range of -40°C to +85°C. REV. Pr B 8/2/02 One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel:781/329-4700 World Wide Web Stie: http://.analog. Fax:781/326-8703 ©ANALOG DEVICES, INC., 2002 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog...