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Product Detailed Parameters
- Description：IC REG LINEAR 3.3V 800MA 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)：3.3V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.3V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：2.5 mA
- Current - Supply (Max)：-
- PSRR：65dB ~ 55dB (120Hz ~ 1kHz)
- Control Features：Enable
- Protection Features：Over Current, Over Temperature, Short Circuit
- 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 LD39080PT33-R is an ultra-low drop BiCMOS voltage regulator manufactured by STMicroelectronics. It provides a guaranteed output current of 0.8 A with an input voltage range of 2.5 V to 6 V. The device features an adjustable output voltage from 1.22 V to 5.0 V, though the PT33 suffix indicates a specific fixed configuration within this family. Quiescent current is typically 1 mA at full load and drops to a maximum of 1 µA in off mode. Dropout voltage is typically 150 mV at 0.8 A load and 20 mV at 150 mA load. Output voltage tolerance is ±1.5% at 25 °C. Operating temperature ranges from -40 °C to +125 °C.
Feature Summary
- Ultra-low dropout voltage performance for efficient power regulation
- Logic-controlled electronic shutdown capability for low standby consumption
- Internal short-circuit and thermal protection mechanisms
- Stable operation with ceramic output capacitors
Applications
- Microprocessor power supply
- DSP power supply
- Post regulators for switching suppliers
- High efficiency linear regulator
Procurement Notes
Verify the exact output voltage specification against the datasheet, as the 'PT33' suffix implies a fixed 3.3 V output despite the general ADJ version listing. Confirm package type PPAK availability and check for obsolescence status on distributor platforms. Ensure application notes regarding minimum capacitance and ESR requirements are met for stability.
Selection Notes
Select this component for applications requiring high current delivery with minimal voltage drop across the regulator. Consider the logic-controlled inhibit pin for system power management needs. Verify that the input voltage remains within the 2.5 V to 6 V range and that the thermal resistance allows for adequate heat dissipation in the target enclosure design.
Part Context
The LD39080 belongs to STMicroelectronics' low-dropout regulator portfolio, designed using BiCMOS technology to maintain low quiescent current regardless of load. This series targets portable electronics and battery-powered devices where efficiency and compact size are critical. The PPAK package offers a compact surface-mount solution suitable for space-constrained PCB layouts.
Replacement Considerations
Check for direct cross-references or updated revisions within the LD39080 series. Consult manufacturer documentation for any newer generations with improved thermal characteristics or alternative packaging options before selecting third-party equivalents.
