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onsemi MC33167TVG
- Part No.:
- MC33167TVG
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
MC33167TVG.pdf
- Description:
- IC REG BUCK BST ADJ 5.5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:3,747
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Product details
Overview
MC33167TVG from onsemi is a fixed-frequency voltage-mode switching regulator IC designed for step-down, inverting, and step-up/down DC-DC converter topologies. It integrates a 5.0 A output switch, 72 kHz oscillator, precision 5.05 V ±2% reference, cycle-by-cycle current limiting, and thermal shutdown. It operates from 7.5 V to 40 V input and supports automotive-grade ambient range (−40°C to +85°C) in TO-220 package.
For engineers reviewing the MC33167TVG datasheet, pinout, applications, or equivalent options, this page delivers verified functional specifications, validated pin roles, confirmed operating conditions, and real-world converter design context - including step-down, inverting, and triple-output configurations with Schottky rectifier interface requirements and thermal derating guidance.
Technical Context
The MC33167TVG implements voltage-mode PWM control using an internal error amplifier with 80 dB open-loop gain and 600 kHz unity-gain bandwidth, referenced to a trimmed 5.05 V bandgap. Its oscillator generates a 72 kHz ramp with 95% max duty cycle, driving a latching PWM comparator that enforces single-pulse metering per cycle.
Protection architecture includes undervoltage lockout (startup at 5.9 V with 0.9 V hysteresis), cycle-by-cycle current limiting (6.5 A typical threshold), and thermal shutdown (activation at ~170°C). Standby mode reduces supply current to 36 µA when compensation pin voltage drops below 150 mV.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Output Current | 5.0 A continuous; enables high-power step-down converters up to ~60 W with proper heatsinking |
| Oscillator Frequency | 72 kHz nominal; fixed internal timing allows predictable EMI profile and simplified filter design |
| Reference Voltage | 5.05 V ±2% at 25°C; provides stable feedback threshold for 5.0 V output without external divider |
| Input Voltage Range | 7.5 V to 40 V; supports 12 V/24 V automotive and industrial bus rails with margin |
| Duty Cycle Range | 0% to 95%; accommodates wide VIN/VOUT ratios in step-down and inverting topologies |
| Operating Temperature | −40°C to +85°C ambient; qualified for under-hood automotive and industrial environments |
| Current Limit Threshold | 6.5 A typical; protects switch during overload while allowing peak inductor current in transient conditions |
Pinout & Package
MC33167TVG uses a 5-lead TO-220 package (Case 314B), with the metal tab electrically connected to Pin 3 (Ground) and intended for heatsink mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1: Compensation | Error amplifier output / loop compensation node | Connects to RC network (RF, CF) for stability; clamping below 150 mV enables 36 µA standby mode |
| Pin 2: Switch Output | Collector of internal NPN power transistor | Drives external inductor; must be paired with Schottky diode (e.g., 1N5825); emitter referenced to ground |
| Pin 3: Ground | Power and signal reference common | Internally tied to heatsink tab; requires low-impedance PCB ground plane and thermal pad connection |
| Pin 4: VCC | Primary power supply input | Accepts 7.5–40 V; powers internal circuitry and enables UVLO (5.9 V startup) |
| Pin 5: Feedback | Inverting input of error amplifier | Monitors output via resistor divider; threshold = 5.05 V; no external reference connection required |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5.0 A switch | Eliminates need for external power transistor in ≤60 W step-down designs, reducing BOM count and layout complexity |
| Fixed 72 kHz oscillator | Enables consistent EMI filtering and predictable inductor sizing without external timing components |
| 5.05 V ±2% reference | Supports accurate 5.0 V output regulation without trimming resistors, improving production yield and load regulation |
| Cycle-by-cycle current limit | Provides robust short-circuit protection without latch-up, maintaining safe operation during intermittent faults |
| −40°C to +85°C operation | Validated for automotive under-hood and industrial control applications where ambient extremes are routine |
Applications
| Automotive Body Control Module (BCM) | Industrial Programmable Logic Controller (PLC) I/O Power |
|---|---|
Use Scenario: Regulating 5.0 V rail from 12 V battery for microcontroller, CAN transceiver, and sensor interfaces in door modules or lighting controllers. IC Role / Device Role / Timing Role: Primary step-down switching regulator with integrated 5.0 A switch and thermal protection. Use Value: Delivers stable 5.0 V @ 5 A with <±0.04% line regulation and 78.9% efficiency at 12 V input, meeting ASIL-B functional safety margins for non-safety-critical subsystems. | Use Scenario: Generating isolated −12 V and +12 V auxiliary rails from 24 V DC bus for analog input conditioning and relay driver stages. IC Role / Device Role / Timing Role: Core controller in voltage-inverting and step-up/down converter configurations with dual-output transformer coupling. Use Value: Enables triple-output design (5.0 V/3.0 A, +12 V/250 mA, −12 V/200 mA) with <±0.03% main rail line regulation and 84.2% total efficiency, reducing external component count by 3× vs. discrete solutions. |
| Off-Line AC/DC Preconverter | Brushed DC Motor Speed Control |
Use Scenario: Front-end 24 V pre-regulator stage fed from rectified AC line via self-oscillating flyback transformer (T1/T2). IC Role / Device Role / Timing Role: Fixed-frequency PWM controller driving primary-side MOSFET in discontinuous conduction mode. Use Value: Achieves 90% conversion efficiency at 125 W with inherent isolation and multi-rail scalability - enabling distributed power architectures without optocouplers or secondary-side regulation. | Use Scenario: Closed-loop speed control of 18 V brushed motor using back-EMF sensing and variable duty-cycle drive. IC Role / Device Role / Timing Role: Adjustable-frequency PWM generator with analog feedback interface to motor winding voltage. Use Value: Maintains ±1% speed stability across 12–24 V input range at low speed and ±6% at high speed, eliminating need for dedicated motor driver ICs or microcontroller-based timing loops. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34167TVG | Same silicon, 0°C to +70°C temp grade; 5.05 V reference tolerance identical; identical pinout and electrical specs | Restricted to commercial/industrial ambient; not qualified for automotive cold-crank or extended temperature cycling | Select when cost-sensitive non-automotive designs require same functionality without extended temperature validation |
| LM2596-5.0 | 3.0 A switch current; 150 kHz frequency; fixed 5.0 V output (no adjustable mode); no inverting capability | Limited to step-down only; lower power ceiling (~36 W); simpler compensation but no standby mode or UVLO hysteresis | Choose for low-cost, low-complexity 5 V point-of-load regulation where inverting or high-current capability is unnecessary |
Compared with MC34167TVG and LM2596-5.0, the MC33167TVG uniquely supports automotive-grade operation, inverting topology, and 5.0 A switching - making it irreplaceable in thermally demanding, multi-rail, or negative-output designs where reliability across −40°C to +85°C is mandatory.
Availability
MC33167TVG is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power supplies, off-line preconverters, and brushed motor control systems requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for MC33167TVG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in power management, analog, and automotive ICs.
The MC33167TVG belongs to the MC33167 series of monolithic switching regulators engineered for robust, low-component-count DC-DC conversion in automotive and industrial environments - emphasizing thermal resilience, wide input range, and topology flexibility.
FAQ
What is the maximum output current capability of the MC33167TVG in a step-down configuration?
The MC33167TVG integrates a 5.0 A output switch with a typical current limit threshold of 6.5 A. In a well-heatsinked step-down application at 12 V input, it reliably delivers 5.0 A continuous output current with 78.9% efficiency and <±0.04% line regulation - as validated in Figure 19 of the official datasheet. Thermal derating applies above +70°C ambient.
Can the MC33167TVG be used in a voltage-inverting configuration, and what design modifications are required?
Yes, the MC33167TVG supports voltage-inverting operation, as demonstrated in Figure 23 of the datasheet. The key modification is connecting the IC's ground pin (Pin 3) to the converter's negative output rail - which reverses the error amplifier's effective inputs and prevents the switch emitter from going below −1.5 V. This configuration achieves −12 V/1.7 A with 79.5% efficiency and 78 mVpp ripple.
Does the MC33167TVG require external timing components for oscillator operation?
No, the MC33167TVG features an internally trimmed 72 kHz oscillator with on-chip timing components - no external capacitor or resistor is needed to set frequency. The oscillator uses a charge/discharge ramp with nominal thresholds of 4.1 V (peak) and 2.3 V (valley), as detailed in the Introduction section (page 7) of the datasheet.
What is the purpose of the Compensation pin (Pin 1) on the MC33167TVG, and how is it used in loop stabilization?
The Compensation pin (Pin 1) is the output of the internal error amplifier and serves as the loop compensation node. It connects to an external RC network (RF and CF) between Pins 1 and 5 to stabilize the feedback loop. As shown in Figures 14 and 19, critical damping is achieved by adjusting RF and CF while observing step-load response - especially vital for step-up and inverting topologies due to their higher phase lag.
Is the MC33167TVG still in active production, and what is its lifecycle status?
The MC33167TVG is marked "DISCONTINUED" in the official onsemi ordering information (page 16), and is not recommended for new designs. However, Aetrix Electronics maintains legacy inventory with full traceability and offers lifecycle coordination support - including cross-reference guidance, obsolescence forecasting, and last-time-buy planning for ongoing production programs relying on this qualified automotive-grade part.
MC33167TVG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Active
- Function:
- Step-Up, Step-Down
- Output Configuration:
- Positive or Negative
- Topology:
- Buck, Boost
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 7.5V
- Voltage - Input (Max):
- 40V
- Voltage - Output (Min/Fixed):
- 5.05V
- Voltage - Output (Max):
- 40V (Switch)
- Current - Output:
- 5.5A (Switch)
- Frequency - Switching:
- 72kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220-5
MC33167TVG FAQ
1.How can I place an order for MC33167TVG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33167TVG on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MC33167TVG reliable?
The price and inventory of MC33167TVG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33167TVG is usually 5 days.
3.What payment methods are accepted for MC33167TVG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33167TVG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33167TVG?
MC33167TVG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33167TVG order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MC33167TVG?
For technical support, including MC33167TVG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33167TVG requirements.
6.How does Aetrix verify that MC33167TVG is sourced from the original manufacturer or authorized distributors?
All MC33167TVG products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MC33167TVG meets industry standards.
7.What is the process for return or replacement of MC33167TVG?
All MC33167TVG units undergo pre-shipment inspection (PSI). If there is an issue with MC33167TVG, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MC33167TVG part is unused and in its original packaging.
Return procedure for MC33167TVG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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