ChipApex | Global Electronic Components Supplier
SEARCH
Search Product
Search Post
— IC芯片 | 连接器 | 传感器 | 被动器件 —
Consult the customer manager about the wholesale price.
consultation hotline：86-132-6715-2157
email：[email protected]
Contact the product manager for consultation. One-stop consultation is available.
Do you want a lower wholesale price? Please send us your inquiry and we will reply immediately.
Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 3A PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR),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 @ 3A
- Current - Output：3A
- Current - Quiescent (Iq)：5 µA
- Current - Supply (Max)：2.5 mA
- PSRR：65dB ~ 55dB (120Hz ~ 1kHz)
- 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：-
Download product information
Overview
The LD39300PT18-R is a fixed-output ultra low drop BICMOS voltage regulator manufactured by STMicroelectronics. It provides a guaranteed output current of 3A with an output voltage of 1.8V. The device operates from an input supply ranging from 2.5V to 6V and features an ultra-low dropout voltage, typically 40mV at 600mA load and 200mV at 3A load. Quiescent current is very low, specified at 1.2mA typical in ON mode and 1µA maximum in OFF mode. It includes logic-controlled electronic shutdown, internal current and thermal limits, and maintains stability with ceramic capacitors.
Feature Summary
- Guarantees 3A output current capability with ultra-low dropout voltage characteristics for high efficiency linear regulation.
- Features logic-controlled electronic shutdown via the inhibit pin, drastically reducing current consumption when disabled.
- Incorporates internal short-circuit protection and thermal shutdown mechanisms to safeguard against overload conditions.
- Designed for stable operation using standard ceramic output capacitors without requiring specific ESR ranges.
Applications
- Microprocessor power supply
- DSPs power supply
- Post regulators for switching supplies
Procurement Notes
Verify component authenticity through authorized STMicroelectronics distributors or certified partners. Confirm package integrity and marking accuracy upon receipt. Ensure storage conditions comply with moisture sensitivity level requirements before soldering. Review the official datasheet for absolute maximum ratings to prevent operational damage during integration.
Selection Notes
Select this part for applications requiring a fixed 1.8V rail with up to 3A load capacity. Verify that the input voltage remains within the 2.5V to 6V operating range. Ensure the design accommodates the required external input and output capacitors for stability. Consider the PPAK package thermal resistance if operating near maximum current loads.
Part Context
This component belongs to the LD39300 series of ultra low drop linear regulators. It utilizes a BiCMOS process to achieve low quiescent current independent of load current. The series offers various fixed and adjustable output voltages, packaged in DPAK and PPAK formats suitable for surface mount assembly.
Replacement Considerations
LD39300DT18-R (DPAK package variant)
FAQ
What is the function of the VSENSE/N.C. pin on the LD39300PT18-R?
For fixed output versions like the PT18-R, the VSENSE/N.C. pin is not connected internally and serves no function.
How does the inhibit pin affect the regulator's operation?
Pulling the inhibit pin below 0.3V turns the regulator off, reducing quiescent current to less than 1µA. Tying it to VI keeps the regulator on.
