Overview
The MC33167D2T, part of the MC33167 series, is a high-performance fixed frequency power switching regulator produced by onsemi. These devices are optimized for dc-to-dc converter applications and are designed to be used in step-down, voltage-inverting, and step-up configurations with a minimal number of external components. The MC33167 series includes all the active functions necessary for these converter types, making them versatile and efficient solutions for various power management needs.
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 |
| 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 |
| Power Supply Current (Standby) | ICC | - | - | 36 | μA |
| Power Supply Current (Operating) | ICC | - | - | 100 | mA |
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)
- Protective features: cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown
- Low power standby mode reducing power supply current to 36 μA
- ESD protection exceeding Human Body Model 2000 V and Machine Model 200 V tests
Applications
The MC33167 series is suitable for a variety of applications, including:
- Automotive systems
- Computer and industrial power supplies
- Cost-sensitive consumer products
- Step-down, voltage-inverting, and step-up converter configurations
- Off-line applications, such as preconverters for AC line voltage conversion
- Distributed power systems requiring multiple independently regulated outputs
Q & A
- What is the maximum input voltage for the MC33167?
The maximum input voltage for the MC33167 is 40 V.
- What is the typical oscillator frequency of the MC33167?
The typical oscillator frequency is 72 kHz.
- What are the protective features of the MC33167?
The protective features include cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown.
- What is the maximum output switch current of the MC33167?
The maximum output switch current is in excess of 5.0 A.
- What is the operating ambient temperature range for the MC33167?
The operating ambient temperature range is -40°C to +85°C.
- Does the MC33167 have ESD protection?
Yes, it exceeds the 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 36 μA.
- Can the MC33167 be used in step-up converter applications?
Yes, it can be used cost-effectively in step-up converter applications.
- What is the thermal resistance, junction-to-ambient, for the D2PAK package?
The thermal resistance, junction-to-ambient, is 70 °C/W.
- What are some common applications for the MC33167?
Common applications include automotive, computer, industrial, and cost-sensitive consumer products.
