LD1117ASTR

$0.58

Description：IC REG LINEAR POS ADJ 1A SOT-223
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:547530da2348 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR POS ADJ 1A SOT-223
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)
Output Configuration：Positive
Output Type：Adjustable
Number of Regulators：1
Voltage - Input (Max)：15V
Voltage - Output (Min/Fixed)：1.25V
Voltage - Output (Max)：15V
Voltage Dropout (Max)：1.3V @ 1A
Current - Output：1A
Current - Quiescent (Iq)：5 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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LD1117ASTR

Overview

The LD1117ASTR is an active low-drop fixed positive voltage regulator manufactured by STMicroelectronics. It provides up to 1 A of output current and is available in fixed output voltages including 1.2 V, 1.8 V, and 3.3 V. The device operates within a temperature range of 0 °C to 125 °C and features a typical dropout voltage of 1.15 V at 1 A output. It utilizes a SOT-223 package and requires only a 10 μF capacitor for stability. The component offers high supply voltage rejection of 80 dB typ. and includes internal current and thermal limiting protections.

Feature Summary

Provides up to 1 A output current with low dropout characteristics
Includes internal current and thermal limit protections
Requires only a common 10 μF capacitor for stability
Offers high supply voltage rejection performance

Applications

Battery-powered systems requiring efficient linear regulation
Post-regulation stages for switching power supplies
General-purpose positive voltage regulation in industrial environments

Procurement Notes

Verify the specific fixed output voltage variant (e.g., 1.2 V, 1.8 V, or 3.3 V) as the base part number covers multiple options. Confirm the SOT-223 package configuration matches the design requirements. Ensure the industrial grade specification meets the operational temperature needs. Check for RoHS compliance status if required by the target market regulations.

Selection Notes

Select this component when a fixed positive voltage is needed with higher current capability than standard LDOs. It is suitable for applications where input-to-output voltage differential is moderate. Consider the thermal dissipation capabilities of the SOT-223 package under maximum load conditions. Verify that the required output voltage corresponds to one of the available fixed versions.

Part Context

This component belongs to the LD1117A family of low-dropout regulators from STMicroelectronics. It is designed for applications requiring stable positive voltage regulation with improved efficiency compared to PNP-based regulators. The series includes both adjustable and fixed output variants, offering flexibility for various power management designs in consumer and industrial electronics.