Overview
The MC34167TVG, part of the MC34167 and MC33167 series, is a high-performance fixed frequency power switching regulator designed for dc-to-dc converter applications. These monolithic devices are optimized for step-down, voltage-inverting, and step-up converter configurations with a minimal number of external components. They are particularly suited for applications requiring high efficiency and reliability in various markets, including automotive, computer, industrial, and cost-sensitive consumer products.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Power Supply Input Voltage (VCC) | 40 | V |
| Switch Output Voltage Range (VO(switch)) | −2.0 to + Vin | V |
| Voltage Feedback and Compensation Input Voltage Range (VFB, VComp) | −1.0 to + 7.0 | V |
| Operating Junction Temperature (TJ) | +150 | °C |
| Operating Ambient Temperature (TA) | 0 to + 70 (MC34167), −40 to + 85 (MC33167) | °C |
| Storage Temperature Range (Tstg) | −65 to +150 | °C |
| Oscillator Frequency (fOSC) | 65 to 81 kHz | kHz |
| Maximum Duty Cycle | 95% | % |
| Current Limit Threshold (Ipk(switch)) | 5.5 to 8.0 | A |
| Power Supply Current (ICC) - Standby | 36 μA | μA |
| Power Supply Current (ICC) - Operating | 40 to 100 mA | mA |
Key Features
- Internal temperature-compensated reference and fixed frequency oscillator.
- Latching pulse width modulator for single pulse metering.
- High gain error amplifier and high current output switch.
- Protective features include cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown.
- Low power standby mode reducing power supply current to 36 μA.
- Support for step-down, voltage-inverting, and step-up converter configurations.
- ESD protection exceeding Human Body Model 2000 V and Machine Model 200 V tests.
Applications
The MC34167TVG is suitable for a wide range of applications, including:
- Automotive systems requiring robust and efficient power conversion.
- Computer and industrial power supplies where high reliability and efficiency are critical.
- Cost-sensitive consumer products that need efficient and compact power solutions.
- Off-line applications, such as preconverters for AC line voltage conversion.
- Distributed power systems where multiple regulators can provide independently regulated outputs.
Q & A
- What is the maximum input voltage for the MC34167TVG?
The maximum input voltage is 40 V. - What are the operating temperature ranges for the MC34167 and MC33167?
The MC34167 operates from 0 to +70°C, while the MC33167 operates from −40 to +85°C. - What is the oscillator frequency range for the MC34167TVG?
The oscillator frequency ranges from 65 to 81 kHz. - What protective features are included in the MC34167TVG?
The device includes cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown. - How does the low power standby mode function?
The low power standby mode reduces the power supply current to 36 μA by clamping the voltage on the error amplifier output to less than 150 mV. - What types of converter configurations are supported by the MC34167TVG?
The device supports step-down, voltage-inverting, and step-up converter configurations. - What is the maximum duty cycle of the MC34167TVG?
The maximum duty cycle is 95%. - What is the current limit threshold for the MC34167TVG?
The current limit threshold ranges from 5.5 to 8.0 A. - How does the ESD protection work for the MC34167TVG?
The device exceeds Human Body Model 2000 V and Machine Model 200 V tests for ESD protection. - What are some common applications for the MC34167TVG?
Common applications include automotive, computer, industrial, and cost-sensitive consumer products, as well as off-line and distributed power systems.
