LM317S SMD IC adjustable voltage regulator D2PAK LM317S-SOT-223

Product Overview:

A surface-mount and through-hole monolithic integrated circuit series designed for use as positive adjustable voltage regulators. They are engineered to supply a high load current over a wide adjustable output voltage range, utilizing an internal architecture that makes them exceptionally easy to implement by eliminating the need to stock numerous fixed-voltage components.

Core Specifications:

Manufacturer: STMicroelectronics

Package Type: TO-220, TO-220FP, D2PAK, and SOT223

Function: 1.2V to 37V Adjustable Voltage Regulator

Input Channels: 1 Raw Power Input Channel

Control Interface: 1 Analog Adjustment Node (ADJUST) for external resistive divider connection

Features

• Wide Adjustable Output Scope: Capable of tuning the regulated positive output voltage continuously from 1.2V up to 37V.

• High Output Current Capacity: Capable of driving load currents in excess of 1.5A during continuous operation.

• High Tightness Regulation: Features a precise 0.1 percent typical line and load regulation to ensure stable supply delivery under varying source and load conditions.

• Floating Operation Capability: Isolates the control circuitry from ground reference, allowing the device to regulate significantly higher voltage differentials as long as the input-to-output maximum limit is maintained.

• Integrated Safety Circuitry: Equipped with a comprehensive suite of onboard protections including internal current limiting, thermal shutdown safeguards, and safe operating area (SOA) control.

• Elimination of Fixed Inventory: Uses a simple two-resistor divider arrangement to select target operational voltages, minimizing engineering bill-of-materials overhead.

Applications

• Programmable Linear Power Supplies: Forms the core regulation block for laboratory power benches and adjustable power adapters.

• Localized On-Card Regulation: Functions as a step-down linear subsystem to clean and drop voltage rails locally on multi-stage digital circuit boards.

• Floating High-Voltage Regulators: Implements power tracking controls within high-voltage telecom and industrial subsystems.

• Constant Current Regulators: Configured with a single fixed resistor between the output and adjustment nodes to act as a precision current source for charging circuits or testing environments.