LDS3985PU15R

$0.74

Description：IC REG LINEAR 1.5V 300MA 6-DFN
Series：-
Mfr：STMicroelectronics
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:b3b02dfef7f7 Category: Voltage Regulators - Linear, Low Drop Out (LDO) Regulators Brand: STMicroelectronics

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Product introduction

Product Detailed Parameters

Description：IC REG LINEAR 1.5V 300MA 6-DFN
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)：1.5V
Voltage - Output (Max)：-
Voltage Dropout (Max)：0.25V @ 300mA
Current - Output：300mA
Current - Quiescent (Iq)：150 µA
Current - Supply (Max)：300 µA
PSRR：55dB ~ 50dB (1kHz ~ 10kHz)
Control Features：Shutdown
Protection Features：Over Current, Over Temperature
Operating Temperature：-40°C ~ 125°C
Mounting Type：Surface Mount
Package / Case：6-VDFN Exposed Pad
Supplier Device Package：6-DFN (3x3)
Grade：-
Qualification：-

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LDS3985PU15R

Overview

The LDS3985PU15R is a fixed positive linear low-dropout regulator manufactured by STMicroelectronics. It provides a fixed output voltage of 1.5V with a maximum continuous output current of 300mA. The device operates within an input voltage range of 2.5V to 6V and features a maximum dropout voltage of 0.25V at full load. Key electrical specifications include a typical quiescent current of 150µA, power supply rejection ratio (PSRR) of 55dB at 1kHz and 50dB at 10kHz, and internal protection against overcurrent and thermal overload. It is housed in a compact 6-DFN package.

Feature Summary

Logic-controlled shutdown function for standby mode operation
Stable with ceramic and high-quality tantalum capacitors
Internal current limit and thermal shutdown protection

Applications

Battery-powered wireless systems
Portable information appliances
Mobile phones

Procurement Notes

Verify the specific suffix 'PU15R' to confirm the 1.5V fixed output voltage and 6-DFN packaging configuration. Ensure compatibility with the required input voltage range of 2.5V to 6V. Confirm that the application design accounts for the specified thermal performance and operating temperature range of -40°C to 125°C. Check for any recent product change notifications regarding this specific part number.

Selection Notes

Select this component when a stable 1.5V rail is required from a 2.5V to 6V source with up to 300mA load capability. The low quiescent current makes it suitable for battery-operated devices where power efficiency is critical. The shutdown feature allows for system-level power management. Ensure the PCB layout supports the 6-DFN package thermal requirements.

Part Context

This component belongs to the LDS3985 series of ultra-low drop and low noise BiCMOS voltage regulators. The series is designed for low-power applications and battery-powered systems, offering various fixed output voltages. The PU15R variant specifically denotes the 1.5V output version in the standard commercial grade package.