Overview
The L7905CD2T-TR is a three-terminal negative voltage regulator from STMicroelectronics, part of the L79 series. This regulator is available in the D2PAK package and is designed to provide a fixed output voltage of -5V. It is suitable for a wide range of applications, including local on-card regulation and split power supplies. The device can deliver up to 1.5 A of output current and features thermal overload protection, short-circuit protection, and output SOA (Safe Operating Area) protection.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Voltage | -4.9 to -5.1 | V |
| Output Current | Up to 1.5 | A |
| Dropout Voltage | 1.4 | V |
| Quiescent Current | 3 | mA |
| Line Regulation | 100 mV (VI = -7 to -25 V) | mV |
| Load Regulation | 100 mV (IO = 5 mA to 1.5 A) | mV |
| Thermal Resistance Junction-Case | 3 | °C/W |
| Thermal Resistance Junction-Ambient | 62.5 | °C/W |
| Storage Temperature Range | -65 to 150 | °C |
| Operating Junction Temperature Range | 0 to 150 (L79xxC), 0 to 125 (L79xxAC) | °C |
Key Features
- Fixed output voltage of -5V
- Output current up to 1.5 A
- Thermal overload protection
- Short-circuit protection
- Output SOA protection
- Output voltage tolerance of 2% (AC version) or 4% (C version) at 25 °C
- Internal current limiting and thermal shutdown
- Can be used with external components for adjustable voltages and currents
Applications
The L7905CD2T-TR is particularly suited for applications requiring local on-card regulation and split power supplies. It can be used in various electronic systems, including:
- Power supplies for electronic equipment
- On-card voltage regulation
- Split power supplies (e.g., ±15 V, ±12 V, ±8 V)
- High current negative voltage regulators
Q & A
- What is the output voltage of the L7905CD2T-TR?
The output voltage is -5V. - What is the maximum output current of the L7905CD2T-TR?
The maximum output current is up to 1.5 A. - What type of package does the L7905CD2T-TR come in?
The L7905CD2T-TR comes in a D2PAK package. - Does the L7905CD2T-TR have thermal protection?
Yes, it has thermal overload protection and thermal shutdown. - Can the L7905CD2T-TR be used for adjustable voltages?
Yes, it can be used with external components to obtain adjustable voltages and currents. - What is the quiescent current of the L7905CD2T-TR?
The quiescent current is 3 mA. - What are the storage and operating temperature ranges for the L7905CD2T-TR?
The storage temperature range is -65 to 150 °C, and the operating junction temperature range is 0 to 150 °C for L79xxC and 0 to 125 °C for L79xxAC. - Does the L7905CD2T-TR have short-circuit protection?
Yes, it has short-circuit protection. - What is the dropout voltage of the L7905CD2T-TR?
The dropout voltage is 1.4 V. - Can the L7905CD2T-TR be used in high current applications?
Yes, it can be used in high current applications, such as high current negative voltage regulators.
