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Product Detailed Parameters
- Description：IC REG LINEAR 1.8V 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)：1.8V
- Voltage - Output (Max)：-
- Voltage Dropout (Max)：0.3V @ 800mA
- Current - Output：800mA
- Current - Quiescent (Iq)：2.5 mA
- Current - Supply (Max)：-
- PSRR：-
- 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 LD39080PT18-R is an ultra-low dropout BiCMOS voltage regulator manufactured by STMicroelectronics. It provides a guaranteed output current of 0.8 A with an input voltage range from 2.5 V to 6 V. The device features an adjustable output voltage, typically set via external resistors, and includes logic-controlled electronic shutdown functionality. Key electrical characteristics include a typical quiescent current of 1 mA at full load and a maximum off-mode current of 1 µA. It incorporates internal current and thermal limits for protection.
Feature Summary
- Ultra-low dropout voltage performance ensures efficient regulation under varying load conditions.
- Logic-controlled electronic shutdown allows for deep sleep modes with minimal power consumption.
- Internal current and thermal limiting mechanisms protect the device during fault conditions.
- Compatible with ceramic output capacitors for stable operation in compact designs.
Applications
- Microprocessor power supply
- DSP power supply
- Post regulators for switching suppliers
Procurement Notes
Verify the specific suffix '18' against official documentation to confirm the fixed output voltage setting or package variant, as ordering suffixes define precise part configurations. Confirm availability status through authorized distributors, as production lifecycles may change. Ensure compatibility with required PCB footprint dimensions for the PPAK package before finalizing procurement orders.
Selection Notes
Select this component when low dropout voltage and high efficiency are critical for battery-operated or low-voltage systems. The adjustable output range accommodates various logic levels. Consider the thermal resistance and ambient operating temperature to ensure junction temperatures remain within safe limits during continuous operation at maximum load currents.
Part Context
This regulator belongs to the LD39080 series, designed for applications requiring fast dynamic response and low noise. The BiCMOS process technology enables low quiescent current regardless of the output load current. It is suitable for space-constrained designs due to its small PPAK package and stability with ceramic capacitors.
Replacement Considerations
Consult official substitution lists for compatible LDOs with similar current ratings and dropout voltages. Verify pinout compatibility and thermal performance metrics before replacing existing components in established designs.
FAQ
What is the function of the ADJ pin on the LD39080?
The ADJ pin serves as the error amplifier input for adjusting the output voltage, allowing it to be set between 1.22 V and 5.0 V using external resistors.
How does the inhibit feature affect power consumption?
Pulling the inhibit pin low turns off the regulator, reducing the quiescent current to a maximum of 1 µA in off mode.
