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Product Detailed Parameters
- Description：IC REG LINEAR 8.5V 500MA PPAK
- Series：-
- Mfr：STMicroelectronics
- Package：Tape & Reel (TR)
- Output Configuration：Positive
- Output Type：Fixed
- Number of Regulators：1
- Voltage - Input (Max)：16V
- Voltage - Output (Min/Fixed)：8.5V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.7V @ 500mA
- Current - Output：500mA
- Current - Quiescent (Iq)：1.5 mA
- Current - Supply (Max)：12 mA
- PSRR：72dB ~ 57dB (120Hz ~ 10kHz)
- 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 LF85ABPT-TR is a positive fixed linear voltage regulator IC from STMicroelectronics, delivering a fixed output of 8.5V with a maximum load current of 500mA. It utilizes a PNP pass transistor architecture to achieve ultra-low dropout performance, ensuring stable regulation even with minimal input-output voltage differentials. The device is designed for stability with small ceramic output capacitors, specifically requiring only 2.2 µF. Packaged in a compact PPAK format, it supports surface mount installation and operates within standard industrial temperature ranges.
Feature Summary
- Implements PNP pass transistor architecture for ultra-low dropout operation
- Ensures stable regulation with minimal external capacitance requirements
- Provides fixed positive output voltage with high current capability
Applications
- Battery-powered systems requiring efficient voltage regulation
- Portable electronic devices with space constraints
- Low noise analog power supply circuits
Procurement Notes
Verify the specific suffix TR indicates tape and reel packaging when sourcing. Confirm the 8.5V output voltage matches system requirements precisely. Ensure the PPAK package footprint aligns with PCB layout specifications. Check RoHS compliance status if required by manufacturing standards. Validate thermal management capabilities for the intended operating environment.
Selection Notes
Select this component when a fixed 8.5V output is required with high efficiency at low dropout voltages. The PNP architecture offers better performance than traditional NPN-based LDOs in low differential scenarios. Consider the 500mA current limit for load requirements. The PPAK package is suitable for applications needing compact form factors without sacrificing thermal dissipation.
Part Context
This part belongs to STMicroelectronics' family of very low drop voltage regulators. These regulators are designed for applications where maintaining regulation near the input voltage is critical. The series typically includes inhibit functions for power management control. The LF85ABPT-TR represents a specific fixed-voltage variant optimized for portable and battery-operated electronics.
Replacement Considerations
Direct substitutes include other STMicroelectronics LDOs with similar 8.5V output and 500mA current ratings. Verify pinout compatibility before replacing. Alternative manufacturers may offer comparable performance but require validation of dropout voltage and stability criteria.
