NCP1421EVB ON Semiconductor, NCP1421EVB Datasheet
NCP1421EVB
Specifications of NCP1421EVB
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NCP1421EVB Summary of contents
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NCP1421 600 mA Sync−Rect PFM Step−Up DC−DC Converter with True−Cutoff and Ring−Killer NCP1421 is a monolithic micropower high−frequency step−up switching converter IC specially designed for battery−operated hand−held electronic products up to 600 mA loading. It integrates Sync−Rect to improve efficiency ...
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V Chip Enable − PFM REF Voltage Reference 4 1. LBI/EN − 2 NCP1421 ZLC + − TRUE CUTOFF CONTROL CONTROL LOGIC _ZCUR _TSDON V DD _MSON _MAINSW2ON GND _CEN _PFM ...
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PIN FUNCTION DESCRIPTIONS Pin Symbol 1 FB Output Voltage Feedback Input. 2 LBI/EN Low−Battery Detector Input and IC Enable. With this pin pulled down below 0.5 V, the device is disabled and enters the shutdown mode. 3 LBO Open−Drain Low−Battery ...
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ELECTRICAL CHARACTERISTICS otherwise noted.) Characteristic Operating Voltage Output Voltage Range Reference Voltage = 200 nF, T OUT LOAD REF Reference Voltage = ...
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TYPICAL OPERATING CHARACTERISTICS 1.220 V = 3.3 V OUT 1.210 = OUT = 1 REF T = 25_C A 1.200 1.190 1.180 1 10 ...
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TYPICAL OPERATING CHARACTERISTICS 100 100 OUTPUT LOADING CURRENT, I Figure 8. Efficiency vs. Load Current 100 100 OUTPUT LOADING CURRENT, I Figure 10. Efficiency vs. Load ...
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TYPICAL OPERATING CHARACTERISTICS 3.3 V OUT L = 5.6 mH − OUT T = 25_C A −10 10 100 OUTPUT LOADING CURRENT, I Figure 14. Output ...
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TYPICAL OPERATING CHARACTERISTICS = 50 mA 5 OUT LOAD Upper Trace: Output Voltage Ripple, 20 mV/Division Lower Trace: Voltage at Lx pin, 1.0 V/Division Figure 20. ...
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NCP1421 is a monolithic micropower high−frequency step−up voltage switching converter IC specially designed for battery operated hand−held electronic products up to 600 mA loading. It integrates a Synchronous Rectifier to improve efficiency as well as to eliminate the external Schottky ...
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If the pin 2 voltage is raised to higher than 0.5 V (for example resistor connected the IC ...
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200 k Shutdown Open Drain Input Low Battery Open Drain Output *Optional Figure 26. Typical Application Schematic for 2 Alkaline Cells Supply Switching mode converter design is considered a complicated process. Selecting the right ...
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From the previous calculations, you need at least 18. order to achieve the specified ripple level at the conditions stated. Practically, a capacitor that is one level larger is used to accommodate factors not taken into account in ...
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... Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. NCP1421 PACKAGE DIMENSIONS Micro8 DM SUFFIX CASE 846A−02 ISSUE F NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14 ...
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... Fax: 480−829−7709 or 800−344−3867 Toll Free USA/Canada Email: orderlit@onsemi.com NCP1421 N. American Technical Support: 800−282−9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2−9−1 Kamimeguro, Meguro−ku, Tokyo, Japan 153−0051 Phone: 81−3−5773−3850 http://onsemi.com 14 ON Semiconductor Website: http://onsemi ...