LD3985M122R

$0.94

Description：IC REG LIN 1.22V 150MA SOT23-5
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:fff68accc741 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LIN 1.22V 150MA SOT23-5
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)
Output Configuration：Positive
Output Type：Fixed
Number of Regulators：1
Voltage - Input (Max)：6V
Voltage - Output (Min/Fixed)：1.22V
Voltage - Output (Max)：-
Voltage Dropout (Max)：-
Current - Output：150mA
Current - Quiescent (Iq)：150 µA
Current - Supply (Max)：250 µA
PSRR：60dB ~ 50dB (1kHz ~ 10kHz)
Control Features：Enable
Protection Features：Over Current, Over Temperature
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：SC-74A, SOT-753
Supplier Device Package：SOT-23-5
Grade：-
Qualification：-

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LD3985M122R

Overview

The LD3985M122R is a positive fixed linear voltage regulator from STMicroelectronics, delivering a fixed output of 1.22V with a maximum load current of 150mA. It operates within an input voltage range of 2.5V to 6V and features an ultra-low dropout voltage of up to 100mV. The device utilizes a surface-mount SOT-23-5 package, measuring 3mm x 1.75mm x 1.3mm. It maintains a low quiescent current of 0.17mA and supports operation at temperatures up to 125°C.

Feature Summary

Ultra-low dropout voltage capability for efficient power management
Low quiescent current consumption suitable for battery-powered applications
Low noise performance ensuring signal integrity in sensitive circuits

Applications

Portable consumer electronics requiring stable low-voltage rails
Battery-operated devices needing extended runtime
RF modules and sensors requiring low-noise power supplies

Procurement Notes

Verify the specific output voltage suffix (122R indicates 1.22V) against circuit requirements. Confirm package type TSOT-23-5 compatibility with PCB footprint. Ensure input voltage remains within the 2.5V to 6V range during operation. Check thermal dissipation capabilities given the small surface-mount package size.

Selection Notes

Select this component when a precise 1.22V output is required with minimal voltage drop across the regulator. Consider its low quiescent current for energy efficiency in portable designs. Evaluate the 150mA current limit against peak load demands. Compare dropout characteristics with alternative regulators if input voltage varies significantly near the output level.

Part Context

This part belongs to the LD3985 series of low-dropout linear regulators designed by STMicroelectronics. The series offers various fixed output voltages tailored for different application needs while maintaining consistent performance characteristics such as low noise and high PSRR. The M122R variant specifically targets applications requiring a 1.22V supply rail.