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NCP1422MNR2 Datasheet(PDF) 1 Page - ON Semiconductor |
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NCP1422MNR2 Datasheet(HTML) 1 Page - ON Semiconductor |
1 / 14 page © Semiconductor Components Industries, LLC, 2006 February, 2006 − Rev. 3 1 Publication Order Number: NCP1422/D NCP1422 800 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer NCP1422 is a monolithic micropower high−frequency step−up switching converter IC specially designed for battery−operated hand−held electronic products up to 800 mA loading. It integrates Sync−Rect to improve efficiency and to eliminate the external Schottky Diode. High switching frequency (up to 1.2 MHz) allows for a low profile, small−sized inductor and output capacitor to be used. When the device is disabled, the internal conduction path from LX or BAT to OUT is fully blocked and the OUT pin is isolated from the battery. This True−Cutoff function reduces the shutdown current to typically only 50 nA. Ring−Killer is also integrated to eliminate the high−frequency ringing in discontinuous conduction mode. In addition to the above, Low−Battery Detector, Logic−Controlled Shutdown, Cycle−by−Cycle Current Limit and Thermal Shutdown provide value−added features for various battery−operated applications. With all these functions on, the quiescent supply current is typically only 8.5 mA. This device is available in the compact and low profile DFN−10 package. Features • Pb−Free Package is Available* • High Efficiency: 94% for 3.3 V Output at 200 mA from 2.5 V Input 88% for 3.3 V Output at 500 mA from 2.5 V Input • High Switching Frequency, up to 1.2 MHz (not hitting current limit) • Output Current up to 800 mA at VIN = 2.5 V and VOUT = 3.3 V • True−Cutoff Function Reduces Device Shutdown Current to typically 50 nA • Anti−Ringing Ring−Killer for Discontinuous Conduction Mode • High Accuracy Reference Output, 1.20 V $1.5% @ 25°C, can Supply 2.5 mA Loading Current when VOUT > 3.3 V • Low Quiescent Current of 8.5 mA • Integrated Low−Battery Detector • Open Drain Low−Battery Detector Output • 1.0 V Startup at No Load Guaranteed • Output Voltage from 1.5 V to 5.0 V Adjustable • 1.5 A Cycle−by−Cycle Current Limit • Multi−Function Logic−Controlled Shutdown Pin • On Chip Thermal Shutdown with Hysteresis Typical Applications • Personal Digital Assistants (PDA) • Handheld Digital Audio Products • Camcorders and Digital Still Cameras • Hand−held Instruments • Conversion from one to two Alkaline, NiMH, NiCd Battery Cells to 3.0−5.0 V or one Lithium−ion cells to 5.0 V • White LED Flash for Digital Cameras PIN CONNECTIONS Device Package Shipping† ORDERING INFORMATION NCP1422MNR2 DFN−10 3000 Tape & Reel http://onsemi.com MARKING DIAGRAM 1422 = Device Code A = Assembly Location L = Wafer Lot Y = Year W = Work Week G = Pb−Free Package (Note: Microdot may be in either location) (Top View) 1 1 1422 ALYW G G DFN−10 MN SUFFIX CASE 485C FB OUT LBI/EN LBO REF NC LX BAT NC GND 1 2 3 4 5 10 9 8 7 6 DFN−10 †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. *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. NCP1422MNR2G DFN−10 (Pb−Free) 3000 Tape & Reel |
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