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DMS-78xxSR

Datel
Part Number DMS-78xxSR
Manufacturer Datel
Description 3.3V/5V/12V Outputs High-Effi ciency Switching Regulators
Published Nov 26, 2005
Detailed Description ® ® A SUBSIDIARY OF C&D TECHNOLOGIES 78SR Series NEW low-profile package Order online at www.datel.com Features • 3.3...
Datasheet PDF File DMS-78xxSR PDF File

DMS-78xxSR
DMS-78xxSR

Overview
® ® A SUBSIDIARY OF C&D TECHNOLOGIES 78SR Series NEW low-profile package Order online at www.
datel.
com Features • 3.
3V/0.
5A, 5V/0.
5A or 12V/0.
4A outputs; Pin and size-compatible with LM7805 & LM7812 regulators • Up to 95% efficiency – no heat sinks or thermal derating required! • Two SIP-packages fit existing TO-220 footprints: Vertical-pin models occupy less than 0.
1 square in.
Optional horizontal pins provide 0.
350 in.
installed height • +7.
5-36Vdc operating input range; Low 3mA quiescent current • Built-in filter capacitors – no external components required • –40 to +70°C operation at full load; Short-circuit protection • Excellent load (±0.
2%) and line (±0.
3%) regulation • Ideal for powering instrumentation from 9V/12V/24V/28V supplies or batteries • Can be used with unregulated dc supplies 3.
3V/5V/12V Outputs High-Efficiency Switching Regulators with LM78XX Pinouts DATEL’s 7805SR (5V output), 7812SR (12V output) and 7803SR (3.
3V output) step-down switching regulators are modern drop-in replacements for older, inefficient, LM7805 and LM7812 linear regulators.
The 78XXSR's are pin- and sizecompatible with industry-standard TO-220 SIP packages.
A 260kHz switching frequency provides for efficiencies as high as 95%.
Full-load (up to 0.
5A) operation from 9V, 12V, 24V, or 36V supplies at ambient temperatures up to +70°C requires no heat sinks, no temperature derating, no forced-air cooling, and no external capacitors.
78SR switching regulators provide many significant improvements over their linear counterparts: lower quiescent current (3mA vs.
5 mA), higher input voltage (40V vs.
32V), and better output accuracy (±1.
5% vs.
±5%).
All these features combine to make 78SR regulators ideal for new or existing LM7805 & LM7812 applications requiring full-load operation at elevated voltages.
Technical Notes 1.
Input/Output (I/O) Filtering: As shown in the noise and ripple graphs, 78SR switching regulators exhibit excellent low-noise performance with no external I/O capacitors.
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