LD1117S28TR

Description：IC REG LIN 2.85V 800MA SOT-223
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR)

SKU:2e11133ce1a4 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LIN 2.85V 800MA 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)：2.85V
Voltage - Output (Max)：-
Voltage Dropout (Max)：1.2V @ 800mA
Current - Output：800mA
Current - Quiescent (Iq)：10 mA
Current - Supply (Max)：-
PSRR：75dB (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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LD1117S28TR

Overview

The LD1117S28TR is a fixed-output low-dropout (LDO) linear voltage regulator manufactured by STMicroelectronics. It provides a stable 2.8 V output with a maximum continuous current 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. It features internal thermal overload and short-circuit protection mechanisms. The component operates within a temperature range of 0°C to +125°C and requires a minimum 10 μF output capacitor for stability.

Feature Summary

Fixed 2.8 V output voltage with ±1% tolerance at 25°C
Low dropout voltage characteristic for efficient power management
Integrated thermal and current limiting protection circuits
High efficiency due to NPN pass transistor architecture

Applications

Battery-powered portable electronic devices requiring efficient voltage regulation
General-purpose positive voltage regulation in embedded systems
Post-regulation stages for switching power supplies

Procurement Notes

Verify the specific suffix 'S' indicates the SOT-223 package and 'TR' denotes tape-and-reel packaging configuration. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to integration. Ensure input voltage remains within specified limits to prevent thermal shutdown during operation.

Selection Notes

Select this component when a fixed 2.8 V rail is required with up to 800 mA load capability. It is suitable for applications prioritizing simplicity and cost-effectiveness over adjustable voltage flexibility. Consider thermal dissipation requirements based on the voltage differential between input and output currents in the SOT-223 package.

Part Context

This part belongs to the LD1117 family of low-dropout regulators from STMicroelectronics. The family includes various fixed voltage options and an adjustable version. The 'S' variant specifically refers to the surface-mount SOT-223 package, which offers improved thermal performance compared to older packages while maintaining space efficiency for modern PCB designs.