Overview
The MC33166TV is a high-performance fixed frequency power switching regulator produced by onsemi. This device is part of the MC33166 series, which is optimized for dc-to-dc converter applications. It operates as a fixed frequency, voltage mode regulator and contains all the active functions required to implement step-down, voltage-inverting, and step-up converters with a minimum number of external components. The MC33166TV is particularly useful in applications requiring high current output and robust protective features.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Power Supply Input Voltage | VCC | - | - | 40 | V |
| Switch Output Voltage Range | VO(switch) | -1.5 | - | + Vin | V |
| Output Switch Current | Ipk(switch) | 3.3 | 4.3 | 6.0 | A |
| Oscillator Frequency | fOSC | - | 72 kHz | - | kHz |
| Undervoltage Lockout Startup Threshold | Vth(UVLO) | 5.5 | 5.9 | 6.3 | V |
| Thermal Shutdown Temperature | Tj | - | - | 170 | °C |
| Power Supply Current (Standby) | ICC | - | 36 | - | μA |
| Power Supply Current (Operating) | ICC | - | 31 | 100 | mA |
Key Features
- Output Switch Current in Excess of 3.0 A
- Fixed Frequency Oscillator (72 kHz) with On-Chip Timing
- Provides 5.05 V Output without External Resistor Divider
- Precision 2% Reference
- 0% to 95% Output Duty Cycle
- Cycle-by-Cycle Current Limiting
- Undervoltage Lockout with Hysteresis
- Thermal Shutdown Protection
- Low Power Standby Mode reducing power supply current to 36 μA
Applications
The MC33166TV is suitable for various applications including automotive, computer, industrial, and cost-sensitive consumer products. It is particularly useful in step-down, voltage-inverting, and step-up converter configurations where high current output and robust protective features are required.
Q & A
- What is the maximum output switch current of the MC33166TV?
The maximum output switch current is in excess of 3.0 A, with a typical value of 4.3 A and a maximum value of 6.0 A. - What is the oscillator frequency of the MC33166TV?
The oscillator frequency is fixed at 72 kHz. - What protective features does the MC33166TV include?
The device includes cycle-by-cycle current limiting, undervoltage lockout with hysteresis, and thermal shutdown protection. - What is the undervoltage lockout startup threshold for the MC33166TV?
The undervoltage lockout startup threshold is between 5.5 V and 6.3 V, with a typical value of 5.9 V. - What is the thermal shutdown temperature for the MC33166TV?
The thermal shutdown temperature is typically at 170°C. - What is the power supply current in standby mode for the MC33166TV?
The power supply current in standby mode is reduced to 36 μA. - In what package is the MC33166TV available?
The MC33166TV is available in a 5-lead TO-220 type package. - What are the typical applications for the MC33166TV?
The device is suitable for automotive, computer, industrial, and cost-sensitive consumer products. - Does the MC33166TV require external components for a 5.05 V output?
No, the MC33166TV provides a 5.05 V output without the need for an external resistor divider. - What is the output duty cycle range of the MC33166TV?
The output duty cycle range is from 0% to 95%.
