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RC1117S25T Datasheet(PDF) 1 Page - Fairchild Semiconductor |
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RC1117S25T Datasheet(HTML) 1 Page - Fairchild Semiconductor |
1 / 9 page www.fairchildsemi.com REV. 1.3.2 10/16/03 Features • Low dropout voltage • Load regulation: 0.05% typical • Trimmed current limit • On-chip thermal limiting • Standard SOT-223, TO-263, and TO-252 packages • Three-terminal adjustable or fixed 2.5V, 2.85V, 3.3V, 5V Applications • Active SCSI terminators • High efficiency linear regulators • Post regulators for switching supplies • Battery chargers • 5V to 3.3V linear regulators • Motherboard clock supplies Description The RC1117 and RC1117-2.5, -2.85, -3.3 and -5 are low dropout three-terminal regulators with 1A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus. Current limit is trimmed to ensure specified output current and controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload and ambient temperatures that would create excessive junction temperatures. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the RC1117 flows into the load, increasing efficiency. The RC1117 series regulators are available in the industry- standard SOT-223, TO-263 (D2PAK), and TO-252 (DPAK) power packages. Typical Applications VIN = 3.3V VIN VOUT ADJ 1.5V at 1A RC1117 10 µF22µF R1 124 Ω R2 24.9 Ω VIN = 5V VIN VOUT GND 2.85V at 1A RC1117-2.85 10 µF ++ + + 22 µF VOUT = VREF(1 + R2/R1) + IAdj • R2 RC1117 1A Adjustable/Fixed Low Dropout Linear Regulator |
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