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STMICROELECTRONICS LD3985M28R Low Noise Voltage Regulator

The LD3985 is a highly efficient, ultra low dropout, low noise BiCMOS voltage regulator capable of delivering up to 150 mA from an input voltage range of 2.5 V to 6 V. It features a minimal dropout voltage of 60 mV at 150 mA, very low quiescent current of 85 nA at no load, and low output noise of 30 μV rms over 10 Hz to 100 kHz, making it ideal for battery-powered and low power applications. Its guaranteed transient response, internal thermal and current limit protections, and fast turn-on time of approximately 200 μs enhance its reliability in mobile and wireless systems. Designed for stability with low ESR ceramic capacitors, it supports wide output voltage options and includes logic-controlled shutdown for power management.

Authorized Distributors
Source:DigiKey
Part No:LD3985M28R
Stock:4929
Inv Date:06-11-2026
Price: Unit price: $0.69
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Part No:LD3985M28R
Stock:2424
Inv Date:06-12-2026
Price: Unit price: $0.51
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Part No:LD3985M28R
Stock:0
Inv Date:06-11-2026
Price: Unit price: $0.41
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Part No:LD3985M28R
Stock:2032
Inv Date:06-12-2026
Price: N/A
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STMICROELECTRONICS LD3985M28R Low Noise Voltage Regulator Specifications:

  • Input voltage range: 2.5 V to 6 V
  • Output current: up to 150 mA
  • Dropout voltage: typical 60 mV at 150 mA
  • Quiescent current: 85 nA at no load, 170 pA at 150 mA
  • Output noise voltage: 30 μV rms (10 Hz to 100 kHz)
  • Fast turn-on time: approximately 200 μs
  • Temperature range: -40°C to 125°C
  • Supports low ESR ceramic capacitors
  • Output voltages: 1.22 V, 1.8 V, 2.5 V, 2.7 V, 2.8 V, 2.9 V, 3 V, 3.3 V, 4.7 V
  • Internal current and thermal limit
  • Logic-controlled electronic shutdown
  • High power supply rejection: better than 60 dB at low frequencies
  • Package: SOT23-5L
  • Fast transient response with a typical turn-on time of 200 μs

Buy the STMicroelectronics LD3985 – Reliable Voltage Regulator for Industrial Applications

Purchase the STMicroelectronics LD3985 ultra low dropout voltage regulator online today and equip your designs with reliable, low noise power management. This durable regulator offers high efficiency, rapid startup, and minimal quiescent current, perfect for battery-powered and wireless systems. With a wide input voltage range up to 6 V and output options like 1.8 V, 3.3 V, and others, it guarantees stability and protection features. Enhance your electronic projects by ordering this high-performance regulator conveniently online now and enjoy fast delivery and dependable operation.

Order your STMicroelectronics LD3985 low noise voltage regulator today and ensure your projects benefit from stable, efficient power supply solutions.

Frequently Asked Questions

Where can I buy STMICROELECTRONICS LD3985M28R?

You can click on the BUY or RFQ button to purchase LD3985M28R from an authorized STMICROELECTRONICS distributor.

How do I troubleshoot issues or seek technical support for part LD3985M28R?

You can download the LD3985M28R datasheet or visit the STMICROELECTRONICS website for support.

Who is the manufacturer of LD3985M28R?

STMICROELECTRONICS

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