Overview
The MC33167TH is a high-performance power switching regulator produced by onsemi. This device is part of the MC33167 series, which is designed for dc-to-dc converter applications. It operates as a fixed frequency, voltage mode regulator and includes all the active functions necessary to implement step-down, voltage-inverting, and step-up converters with a minimal number of external components. The MC33167TH is optimized for use in various markets, including automotive, computer, industrial, and cost-sensitive consumer products.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Oscillator Frequency (VCC = 7.5 V to 40 V, TA = +25°C) | fOSC | 65 | 72 | 81 | kHz |
| Output Switch Current | IOUT | - | - | 5.0 A | A |
| Input Voltage Range | VCC | 7.5 | - | 40 | V |
| Operating Ambient Temperature | TA | -40 | - | +85 | °C |
| Storage Temperature Range | Tstg | -65 | - | +150 | °C |
| Power Supply Current (Standby, VCC = 12 V) | ICC | - | 36 | - | μA |
| Power Supply Current (Operating, VCC = 40 V) | ICC | - | 100 | - | mA |
Key Features
- Fixed frequency oscillator with a nominal frequency of 72 kHz.
- High current output switch capable of handling up to 5.0 A.
- Internal temperature compensated reference and high gain error amplifier.
- Pulse width modulator with latching for single pulse metering.
- Cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown for protection.
- Low power standby mode reducing power supply current to 36 μA.
- ESD protection exceeding Human Body Model 2000 V and Machine Model 200 V.
Applications
- Step-down and voltage-inverting converters with minimal external components.
- Cost-effective step-up converter applications.
- Automotive, computer, industrial, and cost-sensitive consumer products.
- Variable motor speed control with EMF feedback sensing.
- Off-line preconverter and other DC-DC conversion needs).
Q & A
- What is the typical operating frequency of the MC33167TH?
The typical operating frequency is 72 kHz.
- What is the maximum output switch current of the MC33167TH?
The maximum output switch current is in excess of 5.0 A).
- What is the input voltage range for the MC33167TH?
The input voltage range is from 7.5 V to 40 V).
- What protective features are included in the MC33167TH?
The device includes cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown).
- How does the low power standby mode function in the MC33167TH?
The low power standby mode reduces the power supply current to 36 μA when the error amplifier output is clamped below 0.15 V).
- What are the typical applications of the MC33167TH?
Typical applications include step-down, voltage-inverting, and step-up converters, as well as automotive, computer, industrial, and consumer products).
- What is the operating ambient temperature range for the MC33167TH?
The operating ambient temperature range is from -40°C to +85°C).
- Does the MC33167TH have ESD protection?
Yes, it exceeds Human Body Model 2000 V and Machine Model 200 V).
- How can the MC33167TH be configured for different converter types?
The device can be configured for step-down, voltage-inverting, and step-up applications with the addition of external components such as power MOSFETs and inductors).
- What is the storage temperature range for the MC33167TH?
The storage temperature range is from -65°C to +150°C).
