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LR1117A

LRC
Part Number LR1117A
Manufacturer LRC
Description 1A Adjustable/Fixed Low Dropout Linear Regulator
Published Apr 27, 2016
Detailed Description LESHAN RADIO COMPANY, LTD. LR1117A 1A Adjustable/Fixed Low Dropout Linear Regulator Features • Low dropout voltage • Lo...
Datasheet PDF File LR1117A PDF File

LR1117A
LR1117A

Overview
LESHAN RADIO COMPANY, LTD.
LR1117A 1A Adjustable/Fixed Low Dropout Linear Regulator Features • Low dropout voltage • Load regulation: 0.
05% typical • Trimmed current limit • On-chip thermal limiting • Standard SOT-223, TO-220, and TO-252 packages • Three-terminal adjustable or fixed 1.
8V, 2.
5V, 2.
85V, 3.
3V, 5V Applications • Active SCSI terminators • High efficiency linear regulators • Post regulators for switching supplies • Battery chargers • 12V to 5V linear regulators • Motherboard clock supplies Description The LR1117A and LR1117A-1.
8, -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 LR1117A flows into the load, increasing efficiency.
The LR1117A series regulators are available in the industry-standard SOT-223, TO-220, and TO-252 (DPAK) power packages.
Typical Applications VIN = 12V 10µF + LR1117A VIN VOUT ADJ VOUT = VREF(1 + R2/R1) + IADJ • R2 R1 124Ω + 9V at 1A 22µF R2 768Ω VIN = 12V 10µF + LR1117A-5 VIN VOUT GND + 5V at 1A 22µF 1/9 Pin Assignments LESHAN RADIO COMPANY, LTD.
LR1117A Front View Tab is VOUT Front View Tab is VOUT Tab is VOUT Front View 3 2 1 IN OUT ADJ/GND 4-Lead Plastic SOT-223 ΘJC = 15°C/W* 123 ADJ/ OUT IN GND 3-Lead Plastic TO-252 ΘJC = 3°C/W* 12 3 ADJ/ OUT IN GND 3-Lead Plastic TO-220 ΘJC = 3°C/W* *With package soldered to 0.
5 square inch copper area over backside ground plane or internal power ...


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