Texas Instruments LP3966ESX-ADJ/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 Adjustable
Number of Regulators 1
Voltage - Input (Max) 7V
Voltage - Output (Min/Fixed) 1.216V
Voltage - Output (Max) 5.1V
Voltage Dropout (Max) 1.2V @ 3A
Current - Output 3A
Current - Quiescent (Iq) 9 mA
Current - Supply (Max) 15 mA
PSRR -
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 TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
Supplier Device Package TO-263 (DDPAK-5)
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The LP3966ESX-ADJ/NOPB from Texas Instruments is a high-current, adjustable linear regulator capable of delivering up to 3A. Its output voltage can be set from 1.216V to 5.1V, making it versatile for various low-voltage applications. With a dropout voltage of 1.2V at full load and a quiescent current of 9 mA, it balances performance and efficiency. The TO-263 (DDPAK-5) package is designed for surface-mount assembly and effective heat dissipation.

  • High Output Current: 3A capability supports power-hungry digital loads like FPGAs and processors.
  • Adjustable Output: Flexible voltage setting from 1.216V to 5.1V accommodates a wide range of design needs.
  • Surface-Mount Package: TO-263 (DDPAK-5) is ideal for automated manufacturing and space-constrained layouts.
  • Stable Operation: 1.2V dropout at 3A ensures reliable regulation even with moderate input-to-output voltage differences.

High-Current FPGA and DSP Core Supplies

With 3A output capability and adjustable voltage down to 1.216V, this LDO can power the core rails of modern FPGAs and DSPs that require precise, low-voltage regulation.

Post-Regulation for High-Power Switching Supplies

The 1.2V dropout at 3A allows for efficient post-regulation of a 5V or 3.3V switch-mode supply, providing a clean, low-noise output for sensitive loads.

Automotive Infotainment Systems

The TO-263 package is suitable for automotive PCB designs, and the high current capability supports audio amplifiers and display modules.

Industrial Actuator and Motor Control

Provides a stable, high-current rail for control logic and driver circuits in industrial automation, ensuring reliable operation in noisy environments.

Telecommunications Line Cards

Ideal for powering multiple interface transceivers and logic devices from a single regulated rail, simplifying power distribution on dense line cards.

Q: What is the output voltage range?
A: The LP3966ESX-ADJ is an adjustable LDO with an output range from 1.216V up to 5.1V.
Q: What is the maximum output current?
A: It can provide up to 3A of continuous output current.
Q: What is the input voltage range?
A: The input voltage must be at least 1.216V, with the maximum determined by the output voltage and dropout requirements.
Q: What is the dropout voltage?
A: The dropout voltage is typically 1.2V at a 3A load, ensuring stable operation with moderate headroom.
Q: What is the quiescent current?
A: The quiescent current is 9 mA, which is reasonable for a high-current LDO.
Q: What package is available?
A: It is available in a TO-263 (DDPAK-5) surface-mount package.
Base Product Number : LP3966ESX-ADJ
3A 5.1V Adjustable DDPAK-5 High Current LDO Linear Regulator Texas Instruments TO-263
Q: What is the output voltage range?
A: The LP3966ESX-ADJ is an adjustable LDO with an output range from 1.216V up to 5.1V.
Q: What is the maximum output current?
A: It can provide up to 3A of continuous output current.
Q: What is the input voltage range?
A: The input voltage must be at least 1.216V, with the maximum determined by the output voltage and dropout requirements.
Q: What is the dropout voltage?
A: The dropout voltage is typically 1.2V at a 3A load, ensuring stable operation with moderate headroom.
Q: What is the quiescent current?
A: The quiescent current is 9 mA, which is reasonable for a high-current LDO.
Q: What package is available?
A: It is available in a TO-263 (DDPAK-5) surface-mount package.