Overview
The MC79L05ACDE4 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 also be used to control series pass elements in high-current voltage-regulator circuits.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Nominal 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 | 100 | 200 | mV |
| Ripple Rejection | 40 | 49 | 49 | dB |
| Output Regulation | 30 | 60 | 60 | mV |
| Dropout Voltage | 1.7 | 1.7 | 1.7 | V |
| Bias Current | 5.5 | 6 | 6 | mA |
Key Features
- No external components required for operation.
- Internal thermal-overload protection and short-circuit current limiting.
- High ripple rejection (up to 49 dB).
- Low output noise voltage (40 µV).
- Direct replacement for industry-standard MC79L00 series.
- Available in 5% or 10% voltage tolerance selections.
- Immune to overload due to internal current-limiting and thermal-shutdown features.
Applications
- On-card regulation for noise elimination and distribution problem mitigation.
- Control of series pass elements in high-current voltage-regulator circuits.
- Replacement for Zener-diode and resistor combinations to improve output impedance.
- General-purpose negative voltage regulation in various electronic systems.
Q & A
- What is the nominal output voltage of the MC79L05ACDE4?
The nominal output voltage is -5 V.
- What is the maximum output current of the MC79L05ACDE4?
The maximum output current is 100 mA.
- What is the operating junction temperature range for the MC79L05ACDE4?
The operating junction temperature range is 0°C to 125°C.
- Does the MC79L05ACDE4 require external components for operation?
No, it does not require external components for operation.
- What is the ripple rejection of the MC79L05ACDE4?
The ripple rejection is up to 49 dB.
- What is the dropout voltage of the MC79L05ACDE4?
The dropout voltage is 1.7 V.
- What are the key protection features of the MC79L05ACDE4?
The key protection features include internal thermal-overload protection and short-circuit current limiting.
- Can the MC79L05ACDE4 be used as a replacement for a Zener-diode and resistor combination?
- What are the available voltage tolerance selections for the MC79L00 series?
The available voltage tolerance selections are 5% or 10%.
- What is the typical bias current of the MC79L05ACDE4 at 25°C?
The typical bias current at 25°C is 6 mA.
