Overview
The MC34167TV is a high-performance fixed frequency power switching regulator produced by onsemi. This device is part of the MC34167 and MC33167 series, designed for dc-to-dc converter applications. It is optimized for step-down and voltage-inverting configurations, and it can also be used in step-up converter applications with a minimal number of external components. The MC34167TV operates as a voltage mode regulator, incorporating all the necessary active functions for direct implementation of various converter types.
Key Specifications
| Characteristic | Symbol | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Oscillator Frequency (VCC = 7.5 V to 40 V) | fOSC | 65 | 72 | 81 | kHz |
| Voltage Feedback Input Threshold | VFB(th) | 4.95 | 5.05 | 5.20 | V |
| Line Regulation (VCC = 7.5 V to 40 V, TA = +25°C) | Regline | -0.03 | 0.078 | %/V | |
| Input Bias Current (VFB = VFB(th) + 0.15 V) | IIB | -0.15 | 1.0 | μA | |
| Power Supply Rejection Ratio (VCC = 10 V to 20 V, f = 120 Hz) | PSRR | 60 | 80 | dB | |
| Undervoltage Lockout Threshold | Vth(UVLO) | 5.5 | 5.9 | 6.3 | V |
| Output Switch Current | 5.5 | A | |||
| Operating Temperature | 0 | 70 | °C | ||
| Package | TO-220-5 |
Key Features
- Fixed frequency oscillator at 72 kHz with on-chip timing components
- High gain error amplifier and high current output switch
- Protective features including 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
- Internal temperature compensated reference
- Latching pulse width modulator for single pulse metering
- Output switch current in excess of 5.0 A
Applications
The MC34167TV is suitable for various applications, including:
- Automotive systems
- Computer and industrial power supplies
- Cost-sensitive consumer products
Q & A
- What is the typical oscillator frequency of the MC34167TV?
The typical oscillator frequency is 72 kHz.
- What are the input voltage ranges for the MC34167TV?
The input voltage range is from 7.5 V to 40 V.
- What is the maximum output switch current of the MC34167TV?
The maximum output switch current is 5.5 A.
- What protective features are included in the MC34167TV?
The device includes cycle-by-cycle current limiting, undervoltage lockout, and thermal shutdown.
- What is the operating temperature range for the MC34167TV?
The operating temperature range is from 0°C to 70°C.
- What package type is the MC34167TV available in?
The device is available in a TO-220-5 package.
- Can the MC34167TV be used in step-up converter applications?
- What is the power supply rejection ratio (PSRR) of the MC34167TV?
The PSRR is typically 80 dB at 120 Hz.
- Does the MC34167TV have a low power standby mode?
- What is the typical line regulation of the MC34167TV?
The typical line regulation is 0.078 %/V.
