LD3985M28R

$0.58

Description：IC REG LINEAR 2.8V 150MA SOT23-5
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:4adfbb168741 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 2.8V 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)：2.8V
Voltage - Output (Max)：-
Voltage Dropout (Max)：0.1V @ 150mA
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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LD3985M28R

Overview

The LD3985M28R is a BiCMOS ultra-low dropout linear voltage regulator manufactured by STMicroelectronics. It provides a fixed 2.8 V output with a maximum guaranteed load current of 150 mA, operating from an input voltage range of 2.5 V to 6 V. The device features very low quiescent current (85 µA typical at no load) and low output noise (30 µV RMS). It includes logic-controlled electronic shutdown, internal current and thermal limiting, and is stable with low ESR ceramic capacitors. The component operates within a temperature range of -40 °C to +125 °C.

Feature Summary

Ultra-low dropout voltage performance suitable for battery-powered systems
Logic-controlled electronic shutdown function for standby power management
Compatible with low ESR ceramic output capacitors
Internal protection against overcurrent and thermal overload

Applications

Mobile phones and similar battery-powered wireless systems
Portable information appliances
Low power applications requiring extended battery life

Procurement Notes

Verify the specific suffix 'M' indicates the correct package type and tape-and-reel configuration for your manufacturing line. Confirm that the fixed 2.8 V output aligns with your circuit design requirements. Ensure compatibility with low ESR ceramic capacitors as specified in the datasheet to maintain stability. Check for any automotive-grade variants if higher reliability standards are required.

Selection Notes

Select this regulator when a fixed 2.8 V rail is needed with minimal voltage drop under 150 mA loads. It is ideal for space-constrained designs due to its small footprint. Consider the low quiescent current for applications where standby power consumption is critical. Verify that the input voltage remains above the minimum threshold to prevent dropout during peak load conditions.

Part Context

The LD3985 series comprises ultra-low dropout, low-noise BiCMOS voltage regulators designed for portable electronics. This family offers various fixed output voltages and supports up to 150 mA of output current. The devices are optimized for battery-operated systems, providing high power supply rejection ratios and fast turn-on times while maintaining stability with small ceramic capacitors.