Overview
The UA78M05IDCY is a fixed-voltage integrated-circuit voltage regulator produced by Texas Instruments. This device is designed for a wide range of applications and is characterized by its ability to deliver up to 500mA of output current. The UA78M05IDCY is part of the UA78M series, which supports on-card regulation to mitigate post-regulation noise and distribution issues associated with single-point regulation. It operates stably without the need for external components and features internal current-limiting and thermal protection mechanisms to ensure reliable operation across various load conditions.
Key Specifications
| Parameter | Test Conditions | Min | Max | Unit | |
|---|---|---|---|---|---|
| Input Voltage Range (VIN) | - | 5.3 | - | 30 | V |
| Absolute Maximum Input Voltage | - | - | - | Legacy: 35V, New: 45V | V |
| Fixed Output Voltage (VOUT) | VI = 7V to 20V, IO = 5mA to 350mA | 4.8 | 5 | 5.2 | V |
| Output Current (IOUT) | - | - | - | Up to 500mA | mA |
| Quiescent Current (IQ) | - | - | - | 4.5mA | mA |
| Operating Junction Temperature Range | - | -40 | - | 125 | °C |
| Short-Circuit Output Current | VI = 35V (Legacy), VI = 30V (New) | - | - | Legacy: 300mA, New: 400mA | mA |
| Dropout Voltage | - | - | - | 2.0V | V |
Key Features
- Input voltage range: 5.3V to 30V
- Absolute maximum input voltage: Legacy chip - 35V, New chip - 45V
- Fixed output voltage range: 3.3V to 12V (specifically 5V for UA78M05IDCY)
- Output current up to 500mA
- Quiescent current of 4.5mA
- Built-in short-circuit current limiting and thermal protection
- Stable operation without any external components
- Operating junction temperature range: –40°C to +125°C
Applications
- Onboard charging
- Washers and dryers
- Residential lighting
- Battery backup units (BBU)
- Air conditioner outdoor units
Q & A
- What is the input voltage range of the UA78M05IDCY?
The input voltage range is from 5.3V to 30V.
- What is the maximum output current of the UA78M05IDCY?
The maximum output current is up to 500mA.
- Does the UA78M05IDCY require external components for stable operation?
No, it operates stably without any external components.
- What are the built-in protection features of the UA78M05IDCY?
The device features built-in short-circuit current limiting and thermal protection.
- What is the operating junction temperature range of the UA78M05IDCY?
The operating junction temperature range is –40°C to +125°C.
- What is the quiescent current of the UA78M05IDCY?
The quiescent current is 4.5mA.
- What is the dropout voltage of the UA78M05IDCY?
The dropout voltage is 2.0V.
- What are some common applications of the UA78M05IDCY?
Common applications include onboard charging, residential lighting, battery backup units, and air conditioner outdoor units.
- What is the absolute maximum input voltage for the new chip of the UA78M05IDCY?
The absolute maximum input voltage for the new chip is 45V.
- Does the UA78M05IDCY have internal current-limiting mechanisms?
