Overview
The MC33269 series, produced by onsemi, are low dropout, medium current, fixed and adjustable, positive linear voltage regulators. These devices are specifically designed for use in low input voltage applications, offering an economical solution for precision voltage regulation while minimizing power losses. The regulators are available in various output voltage versions, including 3.3 V, 3.5 V, 5.0 V, 12 V, and adjustable options. They are packaged in space-saving DPAK, SO-8, and SOT-223 power packages, making them suitable for a wide range of applications.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (Iout = 10 mA, TA = 25°C) | VO | 3.27 (3.3 V suffix) | 3.33 (3.3 V suffix) | 3.35 (3.3 V suffix) | V |
| Output Voltage (Iout = 10 mA, TA = 25°C) | VO | 3.465 (3.5 V suffix) | 3.535 (3.5 V suffix) | 3.605 (3.5 V suffix) | V |
| Output Voltage (Iout = 10 mA, TA = 25°C) | VO | 4.95 (5.0 V suffix) | 5.05 (5.0 V suffix) | 5.15 (5.0 V suffix) | V |
| Output Voltage (Iout = 10 mA, TA = 25°C) | VO | 11.88 (12 V suffix) | 12.12 (12 V suffix) | 12.36 (12 V suffix) | V |
| Dropout Voltage (Iout = 500 mA) | Vin - Vout | - | 1.0 | 1.25 | V |
| Dropout Voltage (Iout = 800 mA) | Vin - Vout | - | 1.1 | 1.35 | V |
| Output Current | Iout | - | - | 800 | mA |
| Ripple Rejection (10 Vpp, 120 Hz Sinewave; Iout = 500 mA) | RR | 55 | - | - | dB |
| Current Limit (Vin - Vout = 10 V) | ILimit | 800 | - | - | mA |
| Quiescent Current (Fixed Output) | IQ | - | 5.5 | 8.0 | mA |
| Minimum Required Load Current (Fixed Output) | ILoad | - | - | 8.0 | mA |
| Adjustment Pin Current | IAdj | - | 120 | - | μA |
| Ambient Temperature Range | TA | -40 | - | 125 | °C |
| Storage Temperature | Tstg | -55 | - | 150 | °C |
Key Features
- Low Dropout Voltage: Typical dropout voltage of less than 1.0 V, with a maximum of 1.35 V at 800 mA output current.
- High Output Current: Capable of delivering output current in excess of 800 mA.
- Thermal and Short Circuit Protection: Internal protective features include current limiting and thermal shutdown.
- Precision Output Voltage: Output voltage trimmed to 1.0% tolerance.
- Space-Saving Packages: Available in DPAK, SO-8, and SOT-223 power packages.
- Pb-Free Packages: Lead-free packages are available, making them environmentally friendly.
- Adjustable Output Voltage: Adjustable versions allow for flexible voltage regulation.
- Ripple Rejection: High ripple rejection ratio, typically 55 dB at 120 Hz.
Applications
- Low Input Voltage Applications: Designed for use in applications where low input voltage is a requirement.
- Current Regulators: Can be used in current regulator configurations.
- Battery Backed-Up Power Supplies: Suitable for battery-backed power supply systems.
- Digitally Controlled Voltage Regulators: Can be integrated into digitally controlled voltage regulator circuits.
- Automotive and Industrial Systems: The NCV prefix versions are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other demanding applications.
Q & A
- What is the typical dropout voltage of the MC33269?
The typical dropout voltage of the MC33269 is less than 1.0 V, with a maximum of 1.35 V at 800 mA output current.
- What is the maximum output current of the MC33269?
The MC33269 can deliver output current in excess of 800 mA.
- Does the MC33269 have built-in protection features?
Yes, the MC33269 includes internal protective features such as current limiting and thermal shutdown.
- What is the output voltage tolerance of the MC33269?
The output voltage of the MC33269 is trimmed to 1.0% tolerance.
- In what packages is the MC33269 available?
The MC33269 is available in DPAK, SO-8, and SOT-223 power packages.
- Are the MC33269 packages lead-free?
Yes, the MC33269 packages are lead-free, making them environmentally friendly.
- Can the output voltage of the MC33269 be adjusted?
Yes, the MC33269 has adjustable versions that allow for flexible voltage regulation.
- What is the ripple rejection ratio of the MC33269?
The ripple rejection ratio of the MC33269 is typically 55 dB at 120 Hz.
- What are some common applications of the MC33269?
The MC33269 is commonly used in low input voltage applications, current regulators, battery-backed power supplies, and digitally controlled voltage regulators.
- Is the MC33269 suitable for automotive applications?
Yes, the NCV prefix versions of the MC33269 are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other demanding applications.
