Overview
The MC33269 series, produced by onsemi, are low dropout, medium current, fixed and adjustable, positive linear voltage regulators. These regulators are specifically designed for use in low input voltage applications, offering an economical solution for precision voltage regulation while minimizing power losses.
The series includes versions with fixed output voltages of 3.3 V, 3.5 V, 5.0 V, and 12 V, as well as adjustable versions. A 2.85 V version is available as the MC34268. The regulators are available in space-saving DPAK, SO-8, and SOT-223 power packages.
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 |
| Current Limit | ILimit | - | - | 800 | mA |
| Quiescent Current (Fixed Output) | IQ | - | 5.5 | 8.0 | mA |
| Ripple Rejection (10 Vpp, 120 Hz Sinewave; Iout = 500 mA) | RR | - | - | 55 | dB |
| Operating Ambient Temperature Range | TA | -40 | - | 125 | °C |
| Storage Temperature | Tstg | -55 | - | 150 | °C |
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
- Available in fixed (3.3 V, 3.5 V, 5.0 V, 12 V) and adjustable versions
- Space-saving DPAK, SO-8, and SOT-223 power packages
- Pb-free packages available
- NCV prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q100 qualified and PPAP capable
Applications
The MC33269 series is suitable for a variety of applications, including:
- Low input voltage applications requiring precision voltage regulation
- Automotive systems (NCV prefix versions)
- Industrial control systems
- Battery-backed power supplies
- Digitally controlled voltage regulators
- Current regulators
Q & A
- What is the typical dropout voltage of the MC33269?
The typical dropout voltage is less than 1.0 V, with a maximum of 1.35 V at 800 mA output current.
- What are the available output voltage options for the MC33269?
The MC33269 is available in fixed output voltages of 3.3 V, 3.5 V, 5.0 V, and 12 V, as well as adjustable versions.
- What is the maximum output current of the MC33269?
The maximum output current is in excess of 800 mA.
- Does the MC33269 have thermal protection?
Yes, the MC33269 includes thermal protection features.
- What are the available package types for the MC33269?
The MC33269 is available in DPAK, SO-8, and SOT-223 power packages.
- Is the MC33269 suitable for automotive applications?
Yes, the NCV prefix versions are AEC-Q100 qualified and PPAP capable, making them suitable for automotive and other applications requiring unique site and control change requirements.
- What is the operating ambient temperature range of the MC33269?
The operating ambient temperature range is from -40°C to +125°C.
- Does the MC33269 require an external output capacitor for stability?
Yes, the MC33269 requires an external output capacitor of at least 10 μF with an ESR of less than 10 Ω.
- What is the ripple rejection ratio of the MC33269?
The ripple rejection ratio is typically 55 dB at 120 Hz with a 10 Vpp sinewave and an output current of 500 mA.
- Is the MC33269 Pb-free?
Yes, the MC33269 is available in Pb-free packages.
