Overview
The L7915ACV is a negative voltage regulator from STMicroelectronics, part of the L79 series. This three-terminal regulator is designed to provide a stable negative output voltage and is available in various packages including TO-220, TO-220FP, and D²PAK. The L7915ACV is specifically configured to deliver a fixed output voltage of -15V with a maximum output current of 1.5A. It is suitable for applications requiring a reliable and stable negative voltage supply.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25°C | -14.7 | -15 | -15.3 | V |
| Output Voltage (VO) | IO = -5 mA to -1 A, PO ≤ 15 W, VI = -18.5 to -30 V | -14.4 | -15 | -15.6 | V |
| Line Regulation (ΔVO) | VI = -17.5 to -30 V, TJ = 25°C | 300 | mV | ||
| Load Regulation (ΔVO) | IO = 5 mA to 1.5 A, TJ = 25°C | 300 | mV | ||
| Quiescent Current (Id) | TJ = 25°C | 3 | mA | ||
| Output Noise Voltage (eN) | B = 10 Hz to 100 kHz, TJ = 25°C | 250 | µV | ||
| Supply Voltage Rejection (SVR) | ΔVI = 10 V, f = 120 Hz | 54 | 60 | dB | |
| Dropout Voltage (Vd) | IO = 1 A, TJ = 25°C, ΔVO = 100 mV | 1.1 | V | ||
| Short Circuit Current (Isc) | 0.7 | A | |||
| Thermal Resistance Junction-Case (RthJC) | D²PAK | 3 | °C/W | ||
| Thermal Resistance Junction-Ambient (RthJA) | D²PAK | 62.5 | °C/W |
Key Features
- Fixed negative output voltage of -15V
- Maximum output current of 1.5A
- Available in TO-220, TO-220FP, and D²PAK packages
- Internal current limiting and thermal shutdown for protection
- Low dropout voltage of 1.1V at 1A output current
- High supply voltage rejection (SVR) of up to 60 dB
- Low output noise voltage of 250 µV (10 Hz to 100 kHz)
- Quiescent current of 3 mA at 25°C
Applications
- Power supplies requiring stable negative voltage outputs
- Audio and video equipment where stable voltage is crucial
- Industrial control systems and automation
- Medical devices requiring precise voltage regulation
- Split power supply configurations (e.g., ±15V supplies)
Q & A
- What is the output voltage of the L7915ACV?
The output voltage of the L7915ACV is -15V.
- What is the maximum output current of the L7915ACV?
The maximum output current of the L7915ACV is 1.5A.
- In which packages is the L7915ACV available?
The L7915ACV is available in TO-220, TO-220FP, and D²PAK packages.
- What is the dropout voltage of the L7915ACV at 1A output current?
The dropout voltage of the L7915ACV at 1A output current is 1.1V.
- What is the quiescent current of the L7915ACV at 25°C?
The quiescent current of the L7915ACV at 25°C is 3 mA.
- What is the thermal resistance junction-case (RthJC) for the D²PAK package?
The thermal resistance junction-case (RthJC) for the D²PAK package is 3 °C/W.
- What is the supply voltage rejection (SVR) of the L7915ACV?
The supply voltage rejection (SVR) of the L7915ACV is up to 60 dB.
- What is the output noise voltage of the L7915ACV?
The output noise voltage of the L7915ACV is 250 µV (10 Hz to 100 kHz).
- Can the L7915ACV be used in split power supply configurations?
Yes, the L7915ACV can be used in split power supply configurations, such as ±15V supplies.
- What type of capacitors are recommended for stability with the L7915ACV?
Solid tantalum capacitors are recommended for stability. If aluminum electrolytic capacitors are used, at least ten times the value should be selected.
