LD2985BM33R

$0.43

Description：IC REG LINEAR 3.3V 150MA SOT23-5
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:17d2d9853dd1 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 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)：16V
Voltage - Output (Min/Fixed)：3.3V
Voltage - Output (Max)：-
Voltage Dropout (Max)：0.575V @ 150mA
Current - Output：150mA
Current - Quiescent (Iq)：150 µA
Current - Supply (Max)：4 mA
PSRR：45dB (1kHz)
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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LD2985BM33R

Overview

The LD2985BM33R is a fixed-output low-dropout linear regulator from STMicroelectronics, providing a stable 3.3 V output with a maximum load current of 150 mA. It features an ultra-low dropout voltage of 280 mV at full load and 7 mV at 1 mA. The device operates within an input voltage range of 2.5 V to 16 V and maintains a typical quiescent current of 2 mA under load, dropping below 1 μA in sleep mode via the inhibit pin. Noise performance is enhanced by a bypass pin requiring a 10 nF capacitor to achieve 30 μVrms output noise. It includes logic-controlled shutdown, internal thermal and current limiting, and functions across a temperature range of -40 °C to 125 °C.

Feature Summary

Logic-controlled electronic shutdown for power management
Ultra-low dropout voltage for battery efficiency
Low output noise suitable for sensitive circuits
Integrated thermal and current protection

Applications

Cellular phones
Palmtop laptop computers
Personal digital assistants (PDA)
Camcorders and cameras

Procurement Notes

Verify the specific suffix BM33R confirms the 3.3 V fixed output variant. Ensure compatibility with SOT-23-5L surface-mount assembly requirements. Confirm RoHS compliance status matches project specifications. Validate that the inhibit pin logic levels align with system control signals. Check for any obsolescence notices or lifecycle changes before finalizing procurement.

Selection Notes

Select this component when a compact 3.3 V rail is needed with minimal voltage drop under high loads. The low quiescent current makes it ideal for portable devices. The inhibit feature allows for system-wide power savings. Ensure the application requires the specific SOT-23-5L footprint and TTL-compatible shutdown logic.

Part Context

This part belongs to the LD2985 family of very low drop and low noise voltage regulators. The series offers multiple fixed output voltages including 1.8 V, 2.5 V, 2.8 V, 3.0 V, 3.1 V, 3.3 V, and 5.0 V. All variants share the same core architecture featuring low dropout characteristics and logic-controlled shutdown capabilities in a small SOT-23-5L package.