NCP1547DR2G ON Semiconductor, NCP1547DR2G Datasheet
NCP1547DR2G
Specifications of NCP1547DR2G
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NCP1547DR2G Summary of contents
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... Pb−Free Package (Note: Microdot may be in either location) ORDERING INFORMATION Device Package NCP1547DG (Pb−Free) NCP1547DR2G (Pb−Free) NCP1547MNR2G (Pb−Free) †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. ...
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Vout (3 162 C3 + 100 mF R2 100 Figure 1. Application Diagram, 4.5 V − 3 1.0 A Converter MAXIMUM RATINGS* Peak Transient Voltage (31 V Load Dump ...
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PACKAGE PIN DESCRIPTION PIN SYMBOL SO−8 DFN− BOOST The BOOST pin provides additional drive voltage to the on−chip NPN power transistor. The resulting decrease in switch on voltage increases efficiency. 2 2−4 V This pin is the main ...
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ELECTRICAL CHARACTERISTICS (0°C < T Characteristic Oscillator Operating Frequency Frequency Line Regulation Maximum Duty Cycle V Frequency Foldback Threshold FB PWM Comparator Slope Compensation Voltage Minimum Output Pulse Width Power Switch Current Limit Foldback Current Saturation Voltage Current Limit Delay ...
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ELECTRICAL CHARACTERISTICS (continued) Characteristic General Quiescent Current Shutdown Quiescent Current Boost Operating Current Minimum Boost Voltage Startup Voltage Minimum Output Current 5. Guaranteed by design, not 100% tested in production Shutdown Comparator 2.9 V LDO Voltage Regulator 1.3 ...
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THEORY OF OPERATION 2 V Control The NCP1547 buck regulator provides a high level of integration and high operating frequencies allowing the layout of a switch−mode power supply in a very small board area. This device is based on the ...
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T , JUNCTION TEMPERATURE (°C) J Figure 4. Oscillator Frequency Versus Junction Temperature An external clock signal can sync the NCP1547 to a higher frequency. The SYNC ...
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Figure 8. Similar to current mode control, this oscillation occurs at the duty cycle greater than 50% and can be alleviated by using a larger inductor value. The current limit threshold is reduced to Foldback Current ...
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Startup During power up, the regulator tends to quickly charge up the output capacitors to reach voltage regulation. This gives rise to an excessive in−rush current which can be detrimental to the inductor, IC and catch diode compensation ...
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W DRV + The base current of a bipolar transistor is equal to collector current divided by beta of the device. Beta used here to estimate the base current. ...
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Electrolytic capacitors are physically large, and not used in applications where the size, and especially height is the major concern. Ceramic capacitors are now available in values over 10 mF. Since the ceramic capacitor ...
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... For the diode to survive the short circuit condition, the current rating of the diode should be equal to the Foldback Current Limit. See Table 1 for Schottky diodes from ON Semiconductor which are suggested for use with the NCP1547 regulator. Inductor Selection ...
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Table 2. Vendor Coiltronics THIN−PAC: SMT, toroid, low profile Coilcraft DS/DT 1608: SMT, barrel, magnetically shielded DS/DT 3316: SMT, barrel, magnetically shielded DO3308: SMT, barrel, low profile Pulse Product Family UNI−Pac1/2: SMT, barrel CTX: Leaded, toroid DO1608: SMT, barrel DO3316: ...
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... PAD AS WELL AS THE TERMINALS SEATING PLANE SOLDERING FOOTPRINT 4.19 0. 0.05 C NOTE 3 *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/D. http://onsemi.com 14 MILLIMETERS DIM MIN MAX A 0.80 1.00 A1 0.00 0.05 A3 0.20 REF b 0 ...
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... *For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting Techniques Reference Manual, SOLDERRM/ trademark of Switch Power, Inc. ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein ...