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Product attributes Property Value
Manufacturer Texas Instruments
Product Series
Packaging Tube |
Output Configuration Positive
Output Type Adjustable
Number of Regulators 1
Voltage - Input (Max) 40V
Voltage - Output (Min/Fixed) 1.25V
Voltage - Output (Max) 37V
Voltage Dropout (Max) -
Current - Output 1.5A
Current - Quiescent (Iq) 10 mA
Current - Supply (Max) -
PSRR 64dB ~ 57dB (120Hz)
Control Features -
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature 0°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case TO-261-4, TO-261AA
Supplier Device Package SOT-223-4
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The Texas Instruments LM317DCYG3 is a versatile adjustable linear regulator offering an output voltage range from 1.25V to 37V and up to 1.5A of current. With a quiescent current of 10 mA and PSRR of 64dB at 120Hz, it provides reliable performance for a wide range of applications. The SOT-223-4 package enables compact designs while maintaining thermal efficiency.

  • Adjustable Output: 1.25V to 37V range provides design flexibility for multiple applications.
  • High Current: 1.5A output supports power-hungry loads and charging circuits.
  • Proven Reliability: Industry-standard LM317 architecture ensures robust and predictable performance.
  • Good Ripple Rejection: 64dB PSRR at 120Hz minimizes AC line noise in audio and instrumentation.

Adjustable Bench Power Supplies

The 1.25V to 37V adjustable output makes it ideal for hobbyist and lab power supplies, providing flexible voltage for various experiments.

Battery Chargers

With 1.5A current capability, it can be configured as a constant-current/constant-voltage charger for lead-acid or lithium batteries.

Audio Amplifier Biasing

The adjustable output allows precise biasing of audio circuits, while 64dB PSRR at 120Hz reduces mains hum.

Industrial Process Control

Wide output range supports various sensor and actuator supply voltages in PLC and DCS systems.

LED Driver Applications

Can be used as a constant-current source for high-power LEDs, with adjustable current via external resistor.

Q: What is the output voltage range of the LM317DCYG3?
A: The output voltage is adjustable from 1.25V to 37V.
Q: What is the maximum output current?
A: It can deliver up to 1.5A.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: Dropout voltage is not specified in the provided data; refer to the datasheet.
Q: What is the quiescent current?
A: The quiescent current is 10 mA.
Q: What package is available?
A: It comes in a SOT-223-4 package.
Base Product Number : LM317DCY
1.5A Adjustable LDO Linear Regulator LM317 SOT-223-4 Texas Instruments Variable Output
Q: What is the output voltage range of the LM317DCYG3?
A: The output voltage is adjustable from 1.25V to 37V.
Q: What is the maximum output current?
A: It can deliver up to 1.5A.
Q: What is the input voltage range?
A: The input voltage range is not specified in the provided data; refer to the datasheet.
Q: What is the dropout voltage?
A: Dropout voltage is not specified in the provided data; refer to the datasheet.
Q: What is the quiescent current?
A: The quiescent current is 10 mA.
Q: What package is available?
A: It comes in a SOT-223-4 package.