Overview
The MC33167TVG is a high-performance, fixed-frequency power switching regulator produced by onsemi. This device is part of the MC33167 series, which is designed for dc-to-dc converter applications, including step-down, step-up, and voltage-inverting configurations. The MC33167TVG is optimized to operate with a minimum number of external components, making it a cost-effective solution for various power management needs.
The device features 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. It also includes protective features such as cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown. Additionally, it has a low power standby mode that reduces the power supply current to 36 μA.
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 | 81 | kHz |
| Voltage Feedback Input Threshold | VFB(th) | 4.85 | 5.05 | 5.20 | V |
| Output Switch Current | Ipk(switch) | 5.5 | 6.5 | 8.0 | A |
| Operating Junction Temperature | TJ | 150 | °C | ||
| Operating Ambient Temperature | TA | -40 | 85 | °C | |
| Power Supply Current (Standby) | ICC | 36 | 100 | μA/mA |
Key Features
- Fixed-frequency operation at 72 kHz
- High-current output switch capable of handling up to 5.5 A
- Cycle-by-cycle current limiting and thermal shutdown for protection
- Undervoltage lockout for startup and shutdown control
- Low power standby mode reducing power supply current to 36 μA
- High-gain error amplifier for precise voltage regulation
- Pulse width modulator with latching capability to prevent multiple pulses per cycle
- Internal temperature-compensated reference for stability
- ESD protection exceeding Human Body Model 2000 V and Machine Model 200 V tests
Applications
The MC33167TVG is suitable for a variety of applications, including:
- Automotive systems requiring robust and efficient power management
- Computer and industrial power supplies where high reliability and efficiency are crucial
- Cost-sensitive consumer products that need efficient and compact power solutions
- Off-line power conversion systems, such as preconverters and post-regulators in distributed power systems
Q & A
- What is the maximum input voltage for the MC33167TVG?
The maximum input voltage is 40 V.
- What is the typical oscillator frequency of the MC33167TVG?
The typical oscillator frequency is 72 kHz.
- What is the maximum output switch current of the MC33167TVG?
The maximum output switch current is 5.5 A.
- Does the MC33167TVG have protective features?
Yes, it includes cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown.
- What is the power supply current in standby mode?
The power supply current in standby mode is reduced to 36 μA.
- What are the operating temperature ranges for the MC33167TVG?
The operating ambient temperature range is -40°C to +85°C, and the operating junction temperature is up to 150°C.
- Can the MC33167TVG be used in off-line applications?
Yes, it can be used in off-line applications, such as preconverters and post-regulators in distributed power systems.
- What type of package does the MC33167TVG come in?
The MC33167TVG comes in a 5-lead TO-220 package.
- Does the MC33167TVG have ESD protection?
Yes, it exceeds Human Body Model 2000 V and Machine Model 200 V tests.
- What are some recommended design considerations for using the MC33167TVG?
Special care should be taken to separate ground paths from signal currents and load currents. High current loops should be kept short using heavy copper runs to minimize ringing and radiated EMI.
