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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1.5A PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：14V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：180 µA
- Current - Supply (Max)：80 mA
- PSRR：72dB (120Hz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Supplier Device Package：PPAK
- Grade：-
- Qualification：-
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Overview
The LD29150PT18R is a positive fixed-output linear voltage regulator from the STMicroelectronics LD29150 series. It provides a fixed output voltage of 1.8V with a maximum continuous output current of 1.5A. The device utilizes a PPAK surface-mount package (TO-252-3 variant). Key electrical specifications include a maximum input voltage of 14V, a typical dropout voltage of 0.4V at full load, and a maximum quiescent current of 80mA. It features internal thermal overload and short-circuit protection.
Feature Summary
- High current capability delivering up to 1.5A output
- Very low dropout voltage for efficient power management
- Integrated thermal and current limiting protection
- Fixed 1.8V output precision regulation
Applications
- Post-regulation in switching power supplies
- Battery-powered portable systems
- Series power supplies for monitors and TVs
- Computer system peripheral power rails
Procurement Notes
Verify the specific suffix 'PT' against the official STMicroelectronics datasheet to confirm the package type and pinout configuration. Ensure the component status is active as some variants may be obsolete. Cross-reference the manufacturer part number with authorized distributors to avoid counterfeit components. Confirm RoHS compliance requirements match your assembly standards.
Selection Notes
Select this component when a stable 1.8V rail is required for loads up to 1.5A. The PPAK package offers thermal advantages over standard DPAK for high-current applications. Consider the 14V maximum input rating when designing the upstream supply. Verify that the dropout voltage characteristics meet the minimum input-to-output differential requirements of the target circuit under all operating conditions.
Part Context
This part belongs to the LD29150 family of very low drop voltage regulators designed for high-current applications. The series is characterized by high accuracy and low ground current consumption. While many variants are active, specific suffixes like PT may indicate legacy or obsolete status compared to newer replacements. The family is widely used in consumer electronics and industrial control systems requiring reliable linear regulation.
Replacement Considerations
Check for LD29150DT18R if a DPAK package is acceptable instead of PPAK. Verify LD29150PTR for adjustable output options if flexibility is needed. Consult STMicroelectronics for current production status updates as older suffixes may be discontinued.
