Overview
The MC33275ST-3.3T3 is a micropower low dropout voltage regulator produced by onsemi. This device is part of the MC33275 series, which offers a wide range of output voltages and is available in various packages, including SOT-223, SOP-8, DPAK, and DFN 4x4 surface mount packages. The MC33275ST-3.3T3 is specifically designed to provide a fixed output voltage of 3.3V. It is characterized by its low input-to-output voltage differential and extremely low quiescent current, making it ideal for battery-powered computer, consumer, and industrial equipment where extending battery life is crucial.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Output Voltage (IO = 0 mA to 250 mA) | VO | 3.234 | 3.30 | 3.366 | Vdc |
| Input Voltage | VCC | - | - | 13 | Vdc |
| Output Current | IO | - | - | 300 | mA |
| Dropout Voltage (IO = 300 mA) | Vin - VO | - | - | 260 | mV |
| Line Regulation (Vin = [VO + 1] V to 12 V, IO = 250 mA) | Regline | - | - | 10 | mV |
| Load Regulation (Vin = [VO + 1] V, IO = 0 mA to 250 mA) | Regload | - | - | 25 | mV |
| Quiescent Current (ON Mode, Vin = [VO + 1] V, IO = 0 mA) | IQOn | 125 | 200 | - | μA |
| Thermal Shutdown | - | - | - | 150 | °C |
| Operating Ambient Temperature Range | TA | -40 | - | 125 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
Key Features
- Low input-to-output voltage differential of 25 mV at IO = 10 mA and 260 mV at IO = 300 mA.
- Extremely tight line and load regulation.
- Internal current limiting and thermal shutdown protection.
- Very low quiescent current, making it suitable for battery-powered devices.
- Available in various packages: SOT-223, SOP-8, DPAK, and DFN 4x4 surface mount packages.
- Requires minimal external components for stability; a 0.33 μF (or greater) output capacitor is recommended.
- High ripple rejection and low output noise voltage.
Applications
The MC33275ST-3.3T3 is ideally suited for use in battery-powered computer, consumer, and industrial equipment where extending the useful battery life is desirable. It is also suitable for applications requiring low dropout voltage and tight voltage regulation, such as:
- Battery-powered devices.
- Portable electronics.
- Consumer electronics.
- Industrial control systems.
Q & A
- What is the maximum output current of the MC33275ST-3.3T3?
The maximum output current is 300 mA.
- What is the typical dropout voltage at 300 mA output current?
The typical dropout voltage at 300 mA output current is 260 mV.
- What is the operating ambient temperature range of the MC33275ST-3.3T3?
The operating ambient temperature range is from -40°C to +125°C.
- What type of protection does the MC33275ST-3.3T3 have?
The device has internal current limiting and thermal shutdown protection.
- What is the recommended output capacitor value for stability?
A 0.33 μF (or greater) output capacitor is recommended for stability.
- What are the available package types for the MC33275 series?
The available packages include SOT-223, SOP-8, DPAK, and DFN 4x4 surface mount packages.
- What is the quiescent current of the MC33275ST-3.3T3 in ON mode?
The quiescent current in ON mode is typically 200 μA.
- How does the MC33275ST-3.3T3 handle thermal issues?
The device features an internal thermal shutdown circuit that activates at 150°C.
- What is the storage temperature range for the MC33275ST-3.3T3?
The storage temperature range is from -65°C to +150°C.
- What is the ripple rejection performance of the MC33275ST-3.3T3?
The ripple rejection is typically 65 dB at 120 Hz.
