Overview
The L78L15ACZ-AP, produced by STMicroelectronics, is a three-terminal positive voltage regulator from the L78L series. These regulators are designed to be highly robust, featuring internal current limiting and thermal shutdown, making them essentially indestructible. With adequate heat-sinking, they can deliver up to 100 mA of output current. The L78L series is intended for use as fixed voltage regulators in various applications, including local or on-card regulation to eliminate noise and distribution problems associated with single-point regulation. They can also be used in conjunction with power pass elements to create high-current voltage regulators and as replacements for Zener diode/resistor combinations, offering improvements in quiescent current and noise reduction.
Key Specifications
| Parameter | Test Conditions | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|---|
| Output Voltage (VO) | TJ = 25°C | 13.8 | 15 | 16.2 | V |
| Output Voltage (VO) | IO = 1 to 40 mA, VI = 17.5 to 30 V | 13.5 | 16.5 | V | |
| Line Regulation (∆VO) | VI = 17.5 to 30 V, TJ = 25°C | 300 | mV | ||
| Load Regulation (∆VO) | IO = 1 to 100 mA, TJ = 25°C | 80 mV | |||
| Quiescent Current (Id) | TJ = 25°C | 6 | mA | ||
| Output Noise Voltage (eN) | B = 10 Hz to 100 kHz, TJ = 25°C | 70 | µV | ||
| Supply Voltage Rejection (SVR) | VI = 12 to 23 V, f = 120 Hz, IO = 40 mA, TJ = 25°C | 37 | dB | ||
| Dropout Voltage (Vd) | 1.7 | V | |||
| Operating Temperature | -40 | 125°C |
Key Features
- Output current up to 100 mA
- Output voltages of 3.3, 5, 6, 8, 9, 10, 12, 15, 18, and 24 V
- Thermal overload protection and short-circuit protection
- No external components required
- Available in either ± 4% (A) or ± 8% (C) selection
- Internal current limiting and thermal shutdown for robust operation
- Low quiescent current and low noise
- RoHS compliant and Ecopack2 certified
Applications
The L78L15ACZ-AP is suitable for a wide range of applications, including:
- Local or on-card voltage regulation to eliminate noise and distribution problems associated with single-point regulation.
- Use with power pass elements to create high-current voltage regulators.
- Replacement for Zener diode/resistor combinations, offering improvements in quiescent current and noise reduction.
- Industrial and commercial power supply systems.
- Embedded systems and IoT devices requiring stable and regulated voltage.
Q & A
- What is the maximum output current of the L78L15ACZ-AP?
The maximum output current is up to 100 mA with adequate heat-sinking.
- What are the available output voltages for the L78L series?
The L78L series offers output voltages of 3.3, 5, 6, 8, 9, 10, 12, 15, 18, and 24 V.
- Does the L78L15ACZ-AP require external components?
No, the L78L15ACZ-AP does not require any external components.
- What is the operating temperature range of the L78L15ACZ-AP?
The operating temperature range is from -40°C to 125°C.
- Is the L78L15ACZ-AP RoHS compliant?
- What is the quiescent current of the L78L15ACZ-AP?
The quiescent current is typically 6 mA at TJ = 25°C.[
- What is the dropout voltage of the L78L15ACZ-AP?
The dropout voltage is 1.7 V.[
- Can the L78L15ACZ-AP be used as a replacement for Zener diode/resistor combinations?
- What is the supply voltage rejection (SVR) of the L78L15ACZ-AP?
The supply voltage rejection is typically 37 dB at VI = 12 to 23 V, f = 120 Hz, IO = 40 mA, TJ = 25°C.[
- What are the common applications of the L78L15ACZ-AP?
