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 3.3V 800MA DPAK
- 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：-
- Protection Features：Over Current, Over Temperature, Short Circuit
- Operating Temperature：-40°C ~ 125°C
- Mounting Type：Surface Mount
- Package / Case：TO-252-3, DPAK (2 Leads + Tab), SC-63
- Supplier Device Package：DPAK
- Grade：-
- Qualification：-
Download product information
Overview
The LD39080DT33-R is an ultra-low-dropout BiCMOS voltage regulator manufactured by STMicroelectronics. It provides a fixed 3.3 V output with a guaranteed maximum load current of 0.8 A. The device operates within an input voltage range of 2.5 V to 6 V and maintains stability when used with ceramic output capacitors. Key electrical specifications include a typical dropout voltage of 150 mV at full load, a quiescent current of 1 mA in active mode, and less than 1 µA in shutdown mode. It features logic-controlled electronic shutdown, internal current limiting, and thermal protection.
Feature Summary
- Ultra-low dropout voltage operation for high efficiency
- Logic-controlled electronic shutdown for power management
- Stable with low ESR ceramic output capacitors
- Integrated short-circuit and thermal protection
Applications
- Microprocessor power supply
- DSP power supply
- Post regulators for switching supplies
Procurement Notes
Verify the specific suffix 'R' indicates tape and reel packaging configuration. Confirm that the DT package designation corresponds to the PPAK footprint dimensions provided in the datasheet mechanical data section. Ensure compatibility with required input and output capacitor values for stability.
Selection Notes
Select this component for applications requiring low noise and high efficiency from a linear regulator. The fixed 3.3 V output eliminates external resistor networks required for adjustable versions. Verify that the system input voltage remains within the 2.5 V to 6 V operating range to ensure proper regulation and thermal performance.
Part Context
This part belongs to the LD39080 series of ultra-low-dropout regulators. It utilizes a BiCMOS process to achieve low quiescent current across varying load conditions. The series includes both adjustable (ADJ) and fixed voltage options, all sharing similar protection features and stability characteristics with ceramic capacitors.
Replacement Considerations
LD39080PT-R (Adjustable version)
FAQ
What is the minimum output capacitance required for stability?
A minimum output capacitance of 2.2 µF is recommended to guarantee stability.
How does the inhibit pin function?
Pulling the inhibit pin below 0.3 V turns off the regulator, reducing current consumption to less than 1 µA. It must not be left floating.
