LD1117AS33TR

$0.65

Description：IC REG LINEAR 3.3V 1A SOT-223
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:3d37dbc65b21 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 3.3V 1A SOT-223
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：15V
Voltage - Output (Min/Fixed)：3.3V
Voltage - Output (Max)：-
Voltage Dropout (Max)：1.3V @ 1A
Current - Output：1A
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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LD1117AS33TR

Overview

The LD1117AS33TR is a positive fixed linear low-dropout regulator manufactured by STMicroelectronics, delivering a fixed 3.3V output with a maximum current of 1A. It operates within an input voltage range up to 15V and features a maximum dropout voltage of 1.3V at full load. The device incorporates internal overcurrent and thermal overload protection mechanisms. It is housed in a surface-mount SOT-223 package (TO-261-4) and supports an operating temperature range from 0°C to 125°C. The component exhibits a power supply rejection ratio of 75dB at 120Hz and maintains a typical quiescent current of 10mA.

Feature Summary

Integrated overcurrent and thermal overload protection for enhanced operational safety
Low dropout voltage capability allowing efficient regulation with minimal input-output differential
High power supply rejection ratio ensuring stable output against input noise
Fixed 3.3V output configuration simplifying circuit design

Applications

Battery-powered systems requiring stable voltage regulation
General-purpose linear power supplies
Communication equipment power stages
Industrial instrumentation power management

Procurement Notes

Verify the specific suffix 'S' indicates the SOT-223 package variant when sourcing. Confirm RoHS compliance status as per the latest manufacturer documentation. Ensure the ordering quantity matches the standard packaging format provided by the distributor. Cross-reference the DigiKey part number 497-1228-2-ND for accurate inventory tracking. Validate that the application environment stays within the specified 0°C to 125°C operating temperature range.

Selection Notes

Select this component when a fixed 3.3V output is required with up to 1A load capacity. Choose the SOT-223 package for surface-mount applications where space efficiency is prioritized. Consider the 1.3V dropout voltage constraint to ensure sufficient input voltage headroom under all load conditions. Verify that the thermal dissipation capabilities of the PCB layout support the expected power loss at maximum current.

Part Context

This device belongs to the LD1117A series of low-dropout regulators from STMicroelectronics. The series offers various fixed voltage outputs and multiple package options including TO-220 and DPAK. The LD1117AS33TR specifically denotes the 3.3V version in the compact SOT-223 form factor. It shares core architectural features with other members of the family, such as internal protection circuits and similar static current characteristics.