Overview
The MC33269DTRK-012 is a low dropout, medium current, positive voltage regulator from onsemi. This device is part of the MC33269 series, which includes fixed and adjustable output versions. The MC33269DTRK-012 is specifically designed for use in low input voltage applications, offering an economical solution for precision voltage regulation while minimizing power losses. It features a 1.0 V dropout composite PNP-NPN pass transistor, along with current limiting and thermal shutdown for enhanced reliability.
Key Specifications
| Attribute | Value |
|---|---|
| Input Voltage - Max | 20 V |
| Output Voltage - Fixed | Adjustable (this specific model: 1.2 V) |
| Dropout Voltage - Max | 1.35 V |
| Output Current - Max | 800 mA |
| Tolerance (%) | ±1% |
| Operating Temperature Range | -40°C to +125°C |
| Regulator Topology | Adjustable |
| Quiescent Current | 20 mA |
| No. of Outputs | Single |
| Load Regulation (%) | 0.5% |
| Current Limit | 800 mA |
| Line Regulation (%) | 0.3% |
| Package Style | TO-252-3 (DPAK) |
| Mounting Method | Surface Mount |
Key Features
- Low dropout voltage of 1.0 V
- Output current in excess of 800 mA
- Thermal protection and short circuit protection
- Output voltage trimmed to 1.0% tolerance
- Space-saving DPAK, SO-8, and SOT-223 power packages
- Adjustable output voltage
- Internal protective features include current and thermal limiting
- NCV prefix available for automotive and other applications requiring unique site and control change requirements (AEC-Q100 qualified)
Applications
The MC33269DTRK-012 is suitable for a variety of applications requiring precise voltage regulation with low power losses. These include:
- Low input voltage applications
- Automotive systems (with NCV prefix)
- Industrial control systems
- Consumer electronics requiring stable voltage supply
- Battery-backed power supplies
- Digitally controlled voltage regulators
The device requires an external output capacitor for stability, and an input bypass capacitor is recommended to improve transient response, especially with long wire lengths.
Q & A
- What is the maximum input voltage for the MC33269DTRK-012?
The maximum input voltage is 20 V.
- What is the typical dropout voltage of the MC33269DTRK-012?
The typical dropout voltage is less than 1.0 V.
- What is the maximum output current of the MC33269DTRK-012?
The maximum output current is 800 mA.
- What are the operating temperature ranges for the MC33269DTRK-012?
The operating temperature range is -40°C to +125°C.
- Does the MC33269DTRK-012 have built-in protective features?
Yes, it includes current limiting and thermal shutdown.
- What type of packages are available for the MC33269 series?
The MC33269 series is available in DPAK, SO-8, and SOT-223 packages.
- Is the MC33269DTRK-012 suitable for automotive applications?
Yes, with the NCV prefix, it is AEC-Q100 qualified for automotive and other applications requiring unique site and control change requirements.
- What is the recommended output capacitor for stability?
The output capacitor should be at least 10 µF with an ESR of less than 10 Ω but greater than 0.2 Ω over the anticipated operating temperature range.
- Why is an input bypass capacitor recommended?
An input bypass capacitor is recommended to improve transient response, especially if the regulator is connected to the supply input filter with long wire lengths.
- What is the quiescent current of the MC33269DTRK-012?
The quiescent current is 20 mA.
