MC34167TVG

Voltage Regulators - DC DC Switching Regulators Overview

The MC34167TVG is a high-performance fixed-frequency power switching regulator from the MC34167/MC33167 series, manufactured by onsemi. It supports step-down (buck), step-up (boost), and voltage-inverting configurations with an output switch current exceeding 5.0 A. The device operates from an input voltage range of 7.5 V to 40 V and features a fixed 72 kHz oscillator. It includes precision 2% reference, cycle-by-cycle current limiting, undervoltage lockout, and internal thermal shutdown. The component is housed in a 5-lead TO-220 package.

Voltage Regulators - DC DC Switching Regulators Feature Summary

• Supports buck, boost, and inverting DC-to-DC converter topologies with minimal external components
• Integrated cycle-by-cycle current limiting and internal thermal shutdown for robust protection
• Fixed frequency oscillator ensures stable switching performance without external timing adjustments
• Undervoltage lockout with hysteresis prevents erratic operation during low input conditions

Voltage Regulators - DC DC Switching Regulators Applications

• Step-down voltage regulation for industrial control systems
• Voltage inversion for analog circuit biasing requiring negative rails
• Power supply stages in automotive electronics operating within specified voltage ranges
• General-purpose DC-DC conversion in embedded systems

Voltage Regulators - DC DC Switching Regulators Procurement Notes

Verify the specific suffix 'TVG' against the official onsemi datasheet to confirm package type and temperature rating. Ensure compatibility with existing PCB footprints for the TO-220-5 through-hole configuration. Check for RoHS compliance status as manufacturing revisions may vary. Confirm availability of replacement parts if the component reaches end-of-life status.

Voltage Regulators - DC DC Switching Regulators Selection Notes

Select this regulator when designing circuits requiring adjustable output voltages or negative rail generation using a single positive supply. It is suitable for applications demanding high output current up to 5 A with moderate switching frequencies. Consider thermal management requirements due to the linear regulator-like dissipation characteristics at high duty cycles. Evaluate the need for external compensation networks based on the specific load transient requirements.

Voltage Regulators - DC DC Switching Regulators Part Context

The MC34167TVG belongs to the broader MC34167/MC33167 family of switching regulators designed for cost-effective power conversion. This series was engineered to minimize external component count while providing essential protection features. The TVG designation typically indicates a specific package variant and temperature grade within the onsemi portfolio, distinguishing it from surface-mount alternatives like the D2PAK versions.

Voltage Regulators - DC DC Switching Regulators Replacement Considerations

MC33167TVG is listed as a parameter-equivalent replacement for older MC34167 variants such as MC34167TH. Verify pinout compatibility and electrical specifications before substitution. Ensure that any alternative part maintains the same 72 kHz switching frequency and 5 A current capability.