LD1117AS25TR

$0.65

Description：IC REG LINEAR 2.5V 1A SOT-223
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR)

SKU:61c4e1f3f8eb Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 2.5V 1A SOT-223
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：15V
Voltage - Output (Min/Fixed)：2.5V
Voltage - Output (Max)：-
Voltage Dropout (Max)：1.3V @ 1A
Current - Output：1A
Current - Quiescent (Iq)：10 mA
Current - Supply (Max)：-
PSRR：80dB (120Hz)
Control Features：-
Protection Features：Over Current, Over Temperature
Operating Temperature：0°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：TO-261-4, TO-261AA
Supplier Device Package：SOT-223
Grade：-
Qualification：-

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LD1117AS25TR

Overview

The LD1117AS25TR is a fixed-output positive low-dropout voltage regulator manufactured by STMicroelectronics. It provides a stable 2.5 V output with a maximum current capability of 800 mA. The device utilizes an NPN pass transistor to ensure high efficiency, where quiescent current primarily flows into the load rather than being wasted internally. Designed for surface-mount applications, it is housed in a compact SOT-223 package featuring four pins. The component operates within a temperature range of 0 °C to 125 °C and requires only a minimum 10 μF capacitor for stability.

Feature Summary

Fixed 2.5 V output voltage
NPN pass transistor architecture
SOT-223 surface-mount packaging

Applications

Portable battery-powered equipment
Post-regulation for switching power supplies
Embedded system power distribution

Procurement Notes

Verify the specific suffix 'AS' against official datasheets to confirm the 2.5 V fixed output variant, as the LD1117A series includes multiple voltage options. Ensure the ordering code matches the SOT-223 tape-and-reel configuration. Cross-reference the manufacturer part number directly with STMicroelectronics documentation to avoid confusion with similar packages or adjustable versions.

Selection Notes

Select this component when a precise 2.5 V rail is required for digital logic or analog circuits. The SOT-223 package offers thermal advantages over smaller footprints while maintaining space efficiency compared to through-hole options. Consider the 800 mA limit and dropout characteristics relative to the input voltage headroom available in the target design.

Part Context

This part belongs to the LD1117A family of low-dropout regulators from STMicroelectronics. The series is characterized by its ability to deliver up to 800 mA with minimal voltage drop. The 'A' designation typically indicates improved specifications such as tighter tolerance and lower quiescent current compared to earlier iterations. The SOT-223 package is standard for surface-mount implementations requiring moderate power dissipation.