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ADP3031 Arkusz danych(PDF) 1 Page - Analog Devices |
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ADP3031 Arkusz danych(HTML) 1 Page - Analog Devices |
1 / 8 page One Technology Way, P.O. Box 9106, Norwood. MA 02062-9106, U.S.A. Tel:781/329-4700 World Wide Web Stie: http://www.analog.com Fax:781/326-8703 ©ANALOG DEVICES, INC., 2002 REV. PrB 8/2/02 Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. a 2 MHz PWM Boost Switching Regulator Preliminary Technical Data ADP3031 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 Compensation Small Inductor and MLC Capacitors 90% Efficiency Under-voltage Lockout Shutdown APPLICATIONS TFT LCD Bias Supplies Portable Electronic Instruments Industrial/Instrumentation Equipment GENERAL DESCRIPTION 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 tran- sient response, ease of noise filtering, and also small, cost- saving external inductive and capacitive components. The current limit and the power switch are integrated completely 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. Functional Block Diagram PRELIMINARY TECHNICAL DATA REF RAMP GEN RT DRIVER CURRENT SENSE AMPLIFIER COMP SW FB IN COMPARATOR ERROR AMP PGND Q BIAS 6 3 S R F/F 1 gm 2 5 4 SD 7 8 GND OSC ADP3031 |
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