Overview
The MC79L05ACDG4 is a fixed negative-voltage integrated-circuit voltage regulator produced by Texas Instruments. This component is part of the MC79L00 series, designed to provide stable negative voltage outputs for a wide range of applications. It is particularly useful for on-card regulation, eliminating noise and distribution problems associated with single-point regulation. The regulator can deliver up to 100 mA of output current and features internal current-limiting and thermal-shutdown protections, making it immune to overload conditions.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Output Voltage | -4.8 | -5 | -5.2 | V |
| Input Voltage | -7 | -10 | -20 | V |
| Output Current | 1 | 40 | 100 | mA |
| Operating Junction Temperature | 0 | - | 125 | °C |
| Input Regulation | 150 | 200 | mV | - |
| Ripple Rejection | 40 | 49 | dB | - |
| Dropout Voltage | 1.7 | - | - | V |
| Bias Current | 6 | - | - | mA |
Key Features
- No external components required for operation.
- Internal thermal-overload protection and short-circuit current limiting.
- Direct replacement for industry-standard MC79L00 series.
- Available in 5% or 10% voltage tolerance selections.
- Improves output impedance significantly compared to Zener-diode and resistor combinations.
- Low bias current.
Applications
- On-card regulation to eliminate noise and distribution problems.
- Control of series pass elements in high-current voltage-regulator circuits.
- Replacement for Zener-diode and resistor combinations.
- General-purpose negative voltage regulation in various electronic systems.
Q & A
- What is the maximum output current of the MC79L05ACDG4?
The MC79L05ACDG4 can deliver up to 100 mA of output current.
- What are the input voltage ranges for the MC79L05ACDG4?
The input voltage range is from -7 V to -20 V.
- What is the operating junction temperature range for this regulator?
The operating junction temperature range is from 0°C to 125°C.
- Does the MC79L05ACDG4 require external components for operation?
No, the MC79L05ACDG4 does not require external components for operation.
- What is the dropout voltage of the MC79L05ACDG4?
The dropout voltage is 1.7 V at an output current of 40 mA.
- How does the MC79L05ACDG4 improve upon Zener-diode and resistor combinations?
The MC79L05ACDG4 improves output impedance by two orders of magnitude and reduces bias current.
- What are the available package types for the MC79L05ACDG4?
The MC79L05ACDG4 is available in SOIC (D) and TO-226 / TO-92 (LP) packages.
- What is the ripple rejection of the MC79L05ACDG4?
The ripple rejection is 40 to 49 dB.
- Is the MC79L05ACDG4 protected against thermal overload and short circuits?
- What are the typical applications of the MC79L05ACDG4?
Typical applications include on-card regulation, control of series pass elements, and replacement for Zener-diode and resistor combinations.
