Texas Instruments LP3985IM5-2.9/NOPB

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Product attributes Property Value
Manufacturer Texas Instruments
Product Series
Packaging Cut Tape (CT) | Tape & Reel (TR)
Output Configuration Positive
Output Type Fixed
Number of Regulators 1
Voltage - Input (Max) 6V
Voltage - Output (Min/Fixed) 2.9V
Voltage - Output (Max) -
Voltage Dropout (Max) 0.1V @ 150mA
Current - Output 150mA
Current - Quiescent (Iq) 150 µA
Current - Supply (Max) 250 µA
PSRR 50dB ~ 40dB (1kHz ~ 10kHz)
Control Features Enable
Protection Features Over Current, Over Temperature, Short Circuit
Operating Temperature -40°C ~ 125°C
Grade -
Qualification -
Mounting Type Surface Mount
Package / Case SC-74A, SOT-753
Supplier Device Package SOT-23-5
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The LP3985IM5-2.9/NOPB is a 2.9V low dropout linear regulator from National Semiconductor, capable of delivering up to 150mA. It features an ultra-low dropout voltage of just 0.1V at full load, making it highly efficient for battery-powered applications. With a quiescent current of 150 µA and PSRR of 50dB at 1kHz, it provides stable and clean power in a standard SOT-23-5 package.

  • Ultra-Low Dropout: 0.1V at 150mA allows operation with minimal input-to-output voltage difference.
  • Stable Output: Provides a reliable 2.9V rail for sensitive electronics.
  • Good PSRR: 50dB at 1kHz reduces power supply noise.
  • Industry-Standard Package: SOT-23-5 is widely used and easy to integrate.

Mobile Phone Accessories

The 2.9V output and low dropout voltage make it suitable for powering logic circuits in phone accessories.

Portable Gaming Devices

With 150mA output and low dropout, it can efficiently power microcontrollers in handheld gaming devices.

Bluetooth Modules

Its stable 2.9V rail and moderate PSRR help maintain reliable operation of Bluetooth modules.

Digital Cameras

The low dropout voltage ensures stable power even as battery voltage declines.

Sensor Interfaces

It provides a clean 2.9V supply for analog sensor interfaces in portable instruments.

Q: What is the output voltage of the LP3985IM5-2.9?
A: It provides a fixed 2.9V output.
Q: What is the maximum output current?
A: The maximum output current is 150mA.
Q: What is the dropout voltage?
A: The dropout voltage is very low at 0.1V at 150mA.
Q: What is the quiescent current?
A: The quiescent current is 150 µA.
Q: What is the PSRR?
A: The PSRR is 50dB at 1kHz, decreasing to 40dB at 10kHz.
Q: What package is available?
A: It is available in the SOT-23-5 package.
Base Product Number : LP3985IM5-2.9
150mA 2.9V LDO Linear Regulator Low Dropout National Semiconductor SOT-23-5
Q: What is the output voltage of the LP3985IM5-2.9?
A: It provides a fixed 2.9V output.
Q: What is the maximum output current?
A: The maximum output current is 150mA.
Q: What is the dropout voltage?
A: The dropout voltage is very low at 0.1V at 150mA.
Q: What is the quiescent current?
A: The quiescent current is 150 µA.
Q: What is the PSRR?
A: The PSRR is 50dB at 1kHz, decreasing to 40dB at 10kHz.
Q: What package is available?
A: It is available in the SOT-23-5 package.