Overview
The MC33167D2TR4 is a high-performance fixed frequency power switching regulator produced by onsemi. This device is part of the MC33167 series, which is optimized for dc-to-dc converter applications. It is designed to be used in step-down, voltage-inverting, and step-up converter configurations with a minimal number of external components. The MC33167D2TR4 integrates all the active functions necessary for these applications, including an internal temperature-compensated reference, a fixed frequency oscillator, a latching pulse width modulator, a high gain error amplifier, and a high current output switch.
The device is suitable for various markets such as automotive, computer, industrial, and cost-sensitive consumer products. It features protective mechanisms like cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown, ensuring reliable operation under different conditions.
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 (VCC = 7.5 V to 40 V) | fOSC | 65 | 72 | 81 | kHz |
| Error Amplifier Voltage Feedback Input Threshold | VFB(th) | 4.85 | 5.05 | 5.20 | V |
| Operating Junction Temperature | TJ | - | - | +150 | °C |
| Operating Ambient Temperature | TA | -40 | - | +85 | °C |
| Storage Temperature Range | Tstg | -65 | - | +150 | °C |
| Thermal Resistance, Junction-to-Ambient | θJA | - | - | 70 | °C/W |
| Thermal Resistance, Junction-to-Case | θJC | - | - | 5.0 | °C/W |
Key Features
- High-performance fixed frequency power switching regulator
- Internal temperature-compensated reference
- Fixed frequency oscillator (72 kHz) with on-chip timing components
- Latching pulse width modulator for single pulse metering
- High gain error amplifier
- High current output switch (up to 5.0 A)
- Cycle-by-cycle current limiting
- Undervoltage lockout
- Thermal shutdown
- Low power standby mode (reduces power supply current to 36 μA)
- ESD protection (Human Body Model 2000 V, Machine Model 200 V)
Applications
The MC33167D2TR4 is versatile and can be used in various applications, including:
- Automotive systems
- Computer power supplies
- Industrial power systems
- Cost-sensitive consumer electronics
- Step-down, voltage-inverting, and step-up dc-to-dc converter configurations
- Off-line applications with preconverter circuits for AC line voltage conversion
Q & A
- What is the maximum input voltage for the MC33167D2TR4?
The maximum input voltage is 40 V.
- What is the typical oscillator frequency of the MC33167D2TR4?
The typical oscillator frequency is 72 kHz.
- What protective features does the MC33167D2TR4 have?
The device features cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown.
- What is the operating ambient temperature range for the MC33167D2TR4?
The operating ambient temperature range is -40°C to +85°C.
- How much current can the output switch handle?
The output switch can handle up to 5.0 A.
- What is the thermal resistance from junction to ambient for the D2PAK package?
The thermal resistance from junction to ambient is 70°C/W.
- Does the MC33167D2TR4 have ESD protection?
Yes, it has ESD protection exceeding Human Body Model 2000 V and Machine Model 200 V tests.
- What is the power supply current in standby mode?
The power supply current in standby mode is reduced to 36 μA.
- Can the MC33167D2TR4 be used in step-up converter applications?
Yes, it can be used cost-effectively in step-up converter applications.
- What markets are the MC33167D2TR4 suitable for?
The device is suitable for automotive, computer, industrial, and cost-sensitive consumer products.
