AMS1117-3.3

$0.58

Description：IC REG LINEAR 3.3V 1A SOT-223-3L
Series：-
Mfr：UMW
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:652991c0519a Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: UMW

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 3.3V 1A SOT-223-3L
Series：-
Mfr：UMW
Package：Tape & Reel (TR),Cut Tape (CT)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：12V
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：Current Limit
Protection Features：Over Temperature
Operating Temperature：-40°C ~ 125°C (TJ)
Mounting Type：Surface Mount
Package / Case：TO-261-4, TO-261AA
Supplier Device Package：SOT-223-3L
Grade：-
Qualification：-

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AMS1117-3.3

Overview

The UMW AMS1117-3.3 is a positive low dropout voltage regulator providing a fixed 3.3V output with a maximum current of 1A. It operates within an input voltage range up to 12V and supports junction temperatures from -40°C to 150°C. The device features a typical dropout voltage of 1.2V at full load, line regulation of 9mV, and load regulation of 10mV. Quiescent current is typically 5mA, while ripple rejection reaches 60dB at 120Hz. Thermal shutdown activates at 150°C, and current limiting ranges from 2.1A to 2.5A.

Feature Summary

Fixed 3.3V output with less than 2% accuracy tolerance
Integrated thermal shutdown for overload protection
Current limiting capability prevents damage during short circuits
Low dropout performance suitable for battery-powered systems

Applications

Laptop, Palmtop, and Notebook Computers
Battery Charger Systems
SCSI-II Active Terminator
Cellular Phone Power Management
SMPS Post-Regulator

Procurement Notes

Verify the specific package variant (SOT-223-3L, TO-252-2L, or SOT-89-3L) matches your PCB footprint requirements. Confirm that the ordering suffix corresponds to the desired tape-and-reel quantity or cut-tape format. Ensure the component meets RoHS compliance standards if required by your manufacturing process. Cross-reference datasheet electrical characteristics against your system's worst-case operating conditions.

Selection Notes

Select this regulator when a stable 3.3V rail is needed from higher input voltages with minimal voltage drop. Consider the thermal resistance values for your chosen package to ensure adequate heat dissipation at 1A loads. Verify input voltage stability does not exceed the 18V absolute maximum rating. Evaluate the need for external bypass capacitors to maintain stability under varying load conditions.

Part Context

The AMS1117 series includes multiple fixed voltage options such as 1.2V, 1.5V, 1.8V, 2.5V, and 5.0V, alongside an adjustable version. Manufactured by UMW, it utilizes a PNP-driven NPN pass transistor architecture. The device is designed for high-efficiency linear regulation in portable electronics and power management applications requiring compact surface-mount solutions.