Overview
The L4940D2T85-TR is a linear voltage regulator IC produced by STMicroelectronics. This component is part of the L4940 series, known for its very low dropout voltage and high current output. The L4940D2T85-TR is specifically designed to provide a fixed output voltage of 8.5V with a maximum output current of 1.5A. It is packaged in a D²PAK (TO-263-3) case, making it suitable for surface mount applications. This regulator is ideal for use in various industrial and consumer electronics where stable voltage regulation is crucial.
Key Specifications
| Parameter | Value | Parameter | Value |
|---|---|---|---|
| Manufacturer Part Number | L4940D2T85-TR | Output Configuration | Positive |
| Manufacturer | STMicroelectronics | Output Type | Fixed |
| Description | IC REG LINEAR 8.5V 1.5A D2PAK | Number of Regulators | 1 |
| Voltage - Input (Max) | 17V | Voltage - Output (Min/Fixed) | 8.5V |
| Voltage Dropout (Max) | 0.9V @ 1.5A | Current - Output | 1.5A |
| Current - Quiescent (Iq) | 8mA | Current - Supply (Max) | 50mA |
| PSRR | 68dB (120Hz) | Protection Features | Over Temperature, Reverse Polarity, Short Circuit |
| Operating Temperature | -40°C ~ 150°C | Mounting Type | Surface Mount |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | Lead Free Status / RoHS Status | Lead free / RoHS Compliant |
| Package / Case | TO-263-3, D²Pak (2 Leads + Tab), TO-263AB | Packaging | Tape & Reel (TR) |
Key Features
- Precise Output Voltage: Provides a fixed output voltage of 8.5V with high accuracy.
- Low Dropout Voltage: Features a very low dropout voltage of 0.9V at 1.5A, making it efficient for battery-powered devices.
- Low Quiescent Current: Operates with a quiescent current of 8mA, reducing power consumption.
- Thermal Shutdown and Protection: Includes thermal shutdown, short-circuit protection, and reverse polarity protection for enhanced reliability.
- High PSRR: Offers a high power supply rejection ratio (PSRR) of 68dB at 120Hz, ensuring stable output voltage.
- Wide Operating Temperature Range: Operates over a temperature range of -40°C to 150°C, making it suitable for various environmental conditions.
Applications
The L4940D2T85-TR is versatile and can be used in a wide range of applications, including:
- Industrial Equipment: Suitable for industrial control systems, power supplies, and other equipment requiring stable voltage regulation.
- Consumer Electronics: Ideal for use in consumer devices such as audio equipment, medical devices, and other electronic appliances.
- Battery-Powered Devices: Its low dropout voltage and low quiescent current make it particularly suitable for battery-powered equipment, helping to prolong battery life.
- Automotive Systems: Can be used in automotive systems due to its robust protection features and wide operating temperature range.
Q & A
- What is the output voltage of the L4940D2T85-TR?
The output voltage of the L4940D2T85-TR is fixed at 8.5V.
- What is the maximum output current of the L4940D2T85-TR?
The maximum output current is 1.5A.
- What is the maximum input voltage for the L4940D2T85-TR?
The maximum input voltage is 17V.
- What are the protection features of the L4940D2T85-TR?
The device includes over temperature, reverse polarity, and short-circuit protection.
- What is the quiescent current of the L4940D2T85-TR?
The quiescent current is 8mA.
- What is the operating temperature range of the L4940D2T85-TR?
The operating temperature range is -40°C to 150°C.
- Is the L4940D2T85-TR RoHS compliant?
Yes, the L4940D2T85-TR is lead-free and RoHS compliant.
- What is the package type of the L4940D2T85-TR?
The package type is D²PAK (TO-263-3).
- What is the PSRR of the L4940D2T85-TR?
The power supply rejection ratio (PSRR) is 68dB at 120Hz.
- What are some common applications of the L4940D2T85-TR?
Common applications include industrial equipment, consumer electronics, battery-powered devices, and automotive systems.
