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ADP1613-12-EVALZ Datenblatt(PDF) 1 Page - Analog Devices |
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ADP1613-12-EVALZ Datenblatt(HTML) 1 Page - Analog Devices |
1 / 28 page 650 kHz /1.3 MHz Step-Up PWM DC-to-DC Switching Converters ADP1612/ADP1613 Rev. A Information furnished by Analog Devices is believed to be accurate and reliable. However, no responsibilityis assumedbyAnalogDevicesforitsuse,norforanyinfringementsof patentsorother rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No license is granted by implication or otherwise under any patent or patent rights of Analog Devices. Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners. One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A. Tel: 781.329.4700 www.analog.com Fax: 781.461.3113 ©2009 Analog Devices, Inc. All rights reserved. FEATURES Current limit 1.4 A for the ADP1612 2.0 A for the ADP 1613 Minimum input voltage 1.8 V for the ADP1612 2.5 V for the ADP1613 Pin-selectable 650 kHz or 1.3 MHz PWM frequency Adjustable output voltage up to 20 V Adjustable soft start Undervoltage lockout Thermal shutdown 8-lead MSOP APPLICATIONS TFT LCD bias supplies Portable applications Industrial/instrumentation equipment TYPICAL APPLICATION CIRCUIT ADP1612/ ADP1613 6 3 7 8 5 2 1 4 VIN EN FREQ SS SW FB COMP GND ON OFF 1.3MHz 650kHz (DEFAULT) VOUT VIN L1 CIN CSS COUT CCOMP RCOMP R1 R2 D1 Figure 1. Step-Up Regulator Configuration GENERAL DESCRIPTION The ADP1612/ADP1613 are step-up dc-to-dc switching con- verters with an integrated power switch capable of providing an output voltage as high as 20 V. With a package height of less than 1.1 mm, the ADP1612/ADP1613 are optimal for space- constrained applications such as portable devices or thin film transistor (TFT) liquid crystal displays (LCDs). The ADP1612/ADP1613 operate in current mode pulse-width modulation (PWM) with up to 94% efficiency. Adjustable soft start prevents inrush currents when the part is enabled. The pin-selectable switching frequency and PWM current-mode architecture allow for excellent transient response, easy noise filtering, and the use of small, cost-saving external inductors and capacitors. Other key features include undervoltage lockout (UVLO), thermal shutdown (TSD), and logic controlled enable. The ADP1612/ADP1613 are available in the lead-free 8-lead MSOP. 100 90 80 70 60 50 40 30 1 10 100 1k LOAD CURRENT (mA) VIN = 5V fSW = 1.3MHz TA = 25°C ADP1612, VOUT = 12V ADP1612, VOUT = 15V ADP1613, VOUT = 12V ADP1613, VOUT = 15V Figure 2. ADP1612/ADP1613 Efficiency for Various Output Voltages |
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