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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 1.5A PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),Tape & Reel (TR),Cut Tape (CT),Cut Tape (CT)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：6V
- Voltage - Output (Min/Fixed)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.4V @ 1.5A
- Current - Output：1.5A
- Current - Quiescent (Iq)：2.5 mA
- Current - Supply (Max)：-
- PSRR：65dB ~ 55dB (120Hz ~ 1kHz)
- Control Features：-
- Protection Features：Over Current, Over Temperature
- Operating Temperature：-40°C ~ 125°C (TJ)
- Mounting Type：Surface Mount
- Package / Case：TO-252-5, DPAK (4 Leads + Tab), TO-252AD
- Supplier Device Package：PPAK
- Grade：-
- Qualification：-
Download product information
Overview
The LD39150PT18-R is a fast ultra-low-drop linear regulator from STMicroelectronics, operating from an input supply of 2.5 V to 6 V. It provides a fixed 1.8 V output with a guaranteed current of 1.5 A. The device features an ultra-low dropout voltage of 200 mV typical at full load and very low quiescent current of 1 mA typical under load. Developed on a BiCMOS process, it ensures stable operation with ceramic capacitors and includes logic-controlled electronic shutdown, internal current limiting, and thermal protection for reliable performance in low-voltage microprocessor and memory applications.
Feature Summary
- Ultra-low dropout voltage capability for efficient power management
- Logic-controlled electronic shutdown for extended battery life
- Stable operation with small ceramic output capacitors
- Integrated short-circuit constant current limiting and thermal protection
Applications
- Low voltage microprocessor power supplies
- Memory circuit powering
- Battery-powered portable devices
Procurement Notes
Verify the specific suffix 'PT18' confirms the 1.8 V fixed output voltage variant. Confirm the package designation matches the required PCB footprint. Ensure the ordering code corresponds to the correct tape and reel quantity specified by the manufacturer for automated assembly processes.
Selection Notes
Select this component when a fixed 1.8 V rail is required with high current demand up to 1.5 A. The wide input range accommodates varying supply conditions. The low noise and fast dynamic response make it suitable for sensitive digital loads requiring clean power delivery without external compensation components.
Part Context
This part belongs to the LD39150 family of ultra-low drop regulators designed for high-current applications. The family offers various fixed and adjustable output voltages, sharing common features like BiCMOS technology and robust protection mechanisms. It serves as a high-performance alternative to standard LDOs in space-constrained designs.
Replacement Considerations
Check for direct pin-compatible substitutes within the same LD39150 series offering different output voltages or packages. Verify that any replacement maintains the 1.5 A current rating and compatible output capacitance requirements.
