Overview
The MC34166TV, part of the MC34166 and MC33166 series, is a high-performance fixed-frequency power switching regulator designed by onsemi. These monolithic devices are optimized for dc-to-dc converter applications, particularly in step-down, voltage-inverting, and step-up configurations. They integrate all the necessary active functions to implement these converters with a minimal number of external components. The MC34166TV is housed in a 5-lead TO-220 package and is suitable for various applications, including automotive, computer, industrial, and cost-sensitive consumer products.
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 |
| Voltage Feedback and Compensation Input Voltage Range | VFB, VComp | -1.0 | - | + 7.0 | V |
| Output Switch Current | - | - | - | 3.0 A | A |
| Oscillator Frequency | fOSC | 65 | 72 | 79 | kHz |
| Operating Junction Temperature | TJ | - | - | +150 | °C |
| Operating Ambient Temperature | TA | 0 | - | +70 | °C |
| Thermal Resistance, Junction-to-Ambient | �JA | - | - | 65 | °C/W |
| Thermal Resistance, Junction-to-Case | �JC | - | - | 5.0 | °C/W |
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
- Thermal Shutdown
- Low Power Standby Mode (reduces power supply current to 36 μA)
Applications
The MC34166TV is versatile and can be used in various applications, including:
- Automotive systems
- Computer and industrial power supplies
- Cost-sensitive consumer electronics
- Step-down, voltage-inverting, and step-up converter configurations
Q & A
- What is the maximum output switch current of the MC34166TV?
The maximum output switch current is in excess of 3.0 A.
- What is the fixed oscillator frequency of the MC34166TV?
The fixed oscillator frequency is 72 kHz.
- What is the precision of the internal reference voltage?
The internal reference voltage has a precision of 2%.
- What protective features are included in the MC34166TV?
The device includes cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown.
- What is the operating ambient temperature range for the MC34166TV?
The operating ambient temperature range is 0°C to +70°C.
- What is the thermal shutdown temperature for the MC34166TV?
The thermal shutdown typically occurs at 170°C.
- Can the MC34166TV be used in step-up converter applications?
Yes, the MC34166TV can be used cost-effectively in step-up converter applications.
- What is the power supply current in standby mode?
The power supply current in standby mode is reduced to 36 μA.
- What is the maximum power supply input voltage for the MC34166TV?
The maximum power supply input voltage is 40 V.
- What type of package is the MC34166TV available in?
The MC34166TV is available in a 5-lead TO-220 package.
