Overview
The MC33167D2TG is a high-performance, fixed-frequency power switching regulator produced by onsemi. This device is part of the MC33167 series, designed for dc-to-dc converter applications, particularly in step-down, voltage-inverting, and step-up configurations. It integrates all the necessary active functions to implement these converters with a minimal number of external components. The MC33167D2TG is optimized for use in various markets, 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) | -2.0 | - | + Vin | V |
| Oscillator Frequency | fOSC | 65 | 72 | 79 | kHz |
| Voltage Feedback Input Threshold | VFB(th) | 4.95 | 5.05 | 5.15 | V |
| Output Switch Source Saturation | Vsat | VCC - 1.5 | VCC - 1.8 | - | V |
| Current Limit Threshold | Ipk(switch) | 5.5 | 6.5 | 8.0 | A |
| Operating Junction Temperature | TJ | - | - | 150 | °C |
| Operating Ambient Temperature | TA | -40 | - | 85 | °C |
| Storage Temperature Range | Tstg | -65 | - | 150 | °C |
Key Features
- Internal temperature-compensated reference and fixed-frequency oscillator with on-chip timing components.
- 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 MC33167D2TG is suitable for a variety of applications, including:
- Automotive systems: For power conversion in vehicle electronics.
- Computer systems: For efficient power supply in desktop and laptop computers.
- Industrial equipment: For reliable and efficient power conversion in industrial settings.
- Consumer products: For cost-effective power solutions in consumer electronics.
- Off-line applications: Can be used in preconverter circuits to convert AC line voltage to a regulated DC output.
Q & A
- What is the maximum input voltage for the MC33167D2TG?
The maximum input voltage is 40 V. - What is the typical oscillator frequency of the MC33167D2TG?
The typical oscillator frequency is 72 kHz. - What are the protective features of the MC33167D2TG?
The protective features include 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 is the maximum operating junction temperature for the MC33167D2TG?
The maximum operating junction temperature is 150°C. - What are the typical applications of the MC33167D2TG?
The typical applications include automotive, computer, industrial, and consumer electronics. - Does the MC33167D2TG have ESD protection?
Yes, it exceeds Human Body Model 2000 V and Machine Model 200 V tests. - How does the pulse width modulator work in the MC33167D2TG?
The pulse width modulator consists of a comparator with the oscillator ramp voltage applied to the noninverting input and the error amplifier output applied to the inverting input. - What is the maximum peak collector current of the output transistor?
The maximum peak collector current is 5.5 A. - Can the MC33167D2TG be used in step-up converter applications?
Yes, it can be used cost-effectively in step-up converter applications.
