LM317G-AB3-R – UTC Adjustable Positive Voltage Regulator

Quick Answer The LM317G-AB3-R is a versatile three-terminal adjustable positive voltage regulator from Unisonic Technologies (UTC). It can provide an output voltage from 1.2V to 37V with only two external resistors. Capable of delivering up to 1A of output current (subject to thermal conditions), it features internal current limiting, thermal overload protection, and safe operating area compensation, making it ideal for industrial, consumer, and general-purpose power supply applications in a compact SOT-89 package.

Current Stock at ICMASS: Strong inventory available for immediate worldwide delivery.

Key Specifications

[Download Official LM317 Datasheet PDF]

Why Choose LM317G-AB3-R?

• Easy adjustable output from 1.2V to 37V with two external resistors
• High output current capability up to 1A
• Robust protection: internal current limiting and thermal shutdown
• Wide input voltage range
• Excellent line and load regulation
• Compact SOT-89 package for space-constrained designs
• Pb-free, RoHS compliant, and cost-effective

Typical Applications

• Industrial and commercial power supplies
• Battery chargers
• LED drivers and current regulators
• Post-regulation for switching supplies
• Test and measurement instruments
• Consumer electronics
• Programmable voltage sources
• Automotive electronics (non-safety critical)

LM317G-AB3-R Alternatives & Cross Reference Popular Alternatives:

• LM317 series (other packages: TO-220, SOIC-8)
• LM317L (100mA low power version)
• TL317 (lower cost option)
• AMS1117 (LDO fixed/adjustable)
• Modern LDOs for lower dropout

Comparison Table:

Purchasing Information at ICMASS

• Stock Status: Strong inventory available
• MOQ: 100 pieces (samples welcome)
• Lead Time: 1-3 days for stock orders
• Shipping: Fast global delivery (DHL, UPS, FedEx)
• Quality Guarantee: 100% genuine UTC components

Get Competitive Quote – Contact us for bulk pricing and technical support.

Frequently Asked Questions (FAQ)

Q1: What is the LM317G-AB3-R mainly used for? A: It is a widely used adjustable positive voltage regulator for generating custom output voltages from 1.2V to 37V.

Q2: What is the output voltage range? A: Adjustable from 1.2V to 37V using two external resistors.

Q3: What is the maximum output current? A: Up to 1A (depending on heatsinking and thermal conditions).

Q4: What package does the LM317G-AB3-R use? A: SOT-89 (AB3) surface mount package, supplied in Tape & Reel.

Q5: What is the maximum input voltage? A: Up to 40V.

Q6: Does it include protection features? A: Yes, internal current limiting, thermal overload protection, and safe operating area compensation.

Q7: Is it suitable for battery-powered devices? A: Yes, due to its flexibility and protection features.

Q8: Do you have real stock of LM317G-AB3-R? A: Yes, we maintain good inventory levels for fast delivery.

Q9: What is the typical line and load regulation? A: Line regulation is typically 0.01%/V and load regulation is excellent.

Q10: Can you provide reference designs or layout recommendations? A: Yes, we supply official UTC datasheet and typical application circuits.

Q11: Do you offer volume pricing? A: Yes. Competitive tiered pricing is available for quantities from 1K to 100K+.

Q12: How does LM317G-AB3-R compare to LM317L? A: The LM317G offers higher output current capability (up to 1A) compared to the 100mA LM317L.

Related Products

• LM317 series (different packages and current ratings)
• LM317L low power version
• Fixed voltage regulators (78xx / 79xx series)
• Other UTC Linear Voltage Regulators