Datenblatt-Suchmaschine für elektronische Bauteile |
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NCP1423 Datenblatt(PDF) 1 Page - ON Semiconductor |
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NCP1423 Datenblatt(HTML) 1 Page - ON Semiconductor |
1 / 13 page © Semiconductor Components Industries, LLC, 2006 October, 2006 − Rev. 5 1 Publication Order Number: NCP1423/D NCP1423 400 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer NCP1423 is a monolithic micropower high frequency step−up switching converter IC specially designed for battery operated hand−held electronic products. It integrates Synchronous Rectifier for improving efficiency as well as eliminating the external Schottky Diode. High switching frequency (up to 600 kHz) allows low profile inductor and output capacitor being used. When the IC is disabled, internal conduction path from LX or BAT to OUT is blocked, OUT pin is isolated from the battery. This achieves True−Cutoff. Ring−Killer is also integrated to eliminate the high frequency ringing in discontinuous conduction mode. Low−Battery Detector, Cycle−by−Cycle Current Limit, Overvoltage Protection and Thermal Shutdown provide value−added features for various battery operated application. With all of these functions ON, the quiescent supply current is only 9.0 mA. This device is available in compact Micro10 package. Features • High Efficiency: 92% for 3.3 V Output@ 400 mA from 2.5 V Input 87% for 1.8 V Output@ 70 mA from 1.2 V Input • High Switching Frequency, up to 600 kHz (not hitting current limit) • Low Quiescent Current of 9.0 mA • Low Battery Detector • 0.8 V Startup • External Adjustable Output Voltage • ±1.5% Output Voltage Accuracy • Ring−Killer for Discontinuous Conduction Mode • Thermal Shutdown • 1.2 A Cycle−by−Cycle Current Limit • Output Current up to 400 mA @ VOUT = 3.3 V, 200 mA @ VOUT = 1.8 V • Overvoltage Protection • Low Profile and Minimum External Part • Open Drain Low−Battery Detector Output • Compact Micro10 Package • Pb−Free Package is Available Typical Applications • Wireless Optical Mouse • Wireless Headsets • Internet Audio Players • Personal Digital Assistants (PDAs) • Hand−held Instruments • Conversion from one/two NiMH or NiCd cells to 1.8 V / 3.3 V PIN CONNECTIONS Device Package Shipping† ORDERING INFORMATION NCP1423DMR2 Micro10 4000 Tape & Reel http://onsemi.com MARKING DIAGRAM DAR = Device Code A = Assembly Location Y = Year W = Work Week G = Pb−Free Package (Top View) Micro10 DM SUFFIX CASE 846B EN LBO REF FB OUT LBI ADEN BAT GND LX 1 2 3 4 5 10 9 8 7 6 Micro10 †For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. DAR AYW G G NCP1423DMR2G Micro10 (Pb−Free) 4000 Tape & Reel (Note: Microdot may be in either location) |
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