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LM2825N-12 数据表(PDF) 1 Page - National Semiconductor (TI) |
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LM2825N-12 数据表(HTML) 1 Page - National Semiconductor (TI) |
1 / 12 page LM2825 Integrated Power Supply 1A DC-DC Converter General Description The LM2825 is a complete 1A DC-DC Buck converter pack- aged in a 24-lead molded Dual-In-Line integrated circuit package. Contained within the package are all the active and passive components for a high efficiency step-down (buck) switching regulator. Available in fixed output voltages of 3.3V, 5V and 12V, as well as two adjustable versions, these devices can provide up to 1A of load current with fully guaranteed electri- cal specifications. Self-contained, this converter is also fully protected from out- put fault conditions, such as excessive load current, short circuits, or excessive temperatures. Highlights n No external components required (fixed output voltage versions) n Integrated circuit reliability n MTBF over 20 million hours n Radiated EMI meets Class B stipulated by CISPR 22 n High power density, 35 W/in 3 n 24-pin DIP package profile (1.25 x 0.54 x 0.26 inches) Features n Minimum design time required n 3.3V, 5V and 12V fixed output versions n Two adjustable versions allow 1.23V to 15V outputs n Wide input voltage range, up to 40V n Low-power standby mode, I Q typically 65 µA n High efficiency, typically 80% n ± 4% output voltage tolerance n Excellent line and load regulation n TTL shutdown capability/programmable Soft-start n Thermal shutdown and current limit protection n −40˚C to +85˚C ambient temperature range Applications n Simple high-efficiency step-down (buck) regulator n On-card switching regulators n Efficient pre-regulator for linear regulators n Distributed power systems n DC/DC module replacement Standard Application (Fixed output voltage versions) Radiated EMI Radiated emission of electromagnetic fields is measured at 10m distance. The emission levels are within the Class B limits stipulated by CISPR 22. 30. . . .230 MHz 30 dB µV/m 230. . . .1000 MHz 37 dB µV/m 1. . . .10 GHz 46 dB µV/m Connection Diagram Ordering Information Order Number LM2825N-3.3, LM2825N-5.0, LM2825N-12, LM2825N-ADJ or LM2825HN-ADJ See NS Package Number NA24F DS012661-27 DS012661-1 DS012661-2 “NC (Do not use)” pins: See Figure 11. Top View May 1997 © 1997 National Semiconductor Corporation DS012661 www.national.com |
类似零件编号 - LM2825N-12 |
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类似说明 - LM2825N-12 |
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