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onsemi MC33167TV
- Part No.:
- MC33167TV
- Manufacturer:
- onsemi
- Package:
- TO-220-5 Formed Leads
- Datasheet:
-
MC33167TV.pdf
- Description:
- IC REG BUCK BST ADJ 5.5A TO220-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,982
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Product details
Overview
MC33167TV 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 with on-chip timing, 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 temperature range (−40°C to +85°C) in TO-220 package.
For engineers reviewing the MC33167TV datasheet, pinout, applications, or equivalent options, this page delivers verified technical context, real-world converter configurations (step-down/inverting/step-up-down), thermal and current-limiting behavior, standby mode operation at 36 µA, and validated alternative options for industrial power supply design.
Technical Context
The MC33167TV 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 (62–79 kHz over temperature) with 95% max duty cycle and internal blanking to prevent multiple pulses per cycle.
Current protection uses cycle-by-cycle sensing via an internal resistor and comparator, triggering latch reset at 6.5 A typical peak switch current. Undervoltage lockout activates at 5.9 V (±0.4 V hysteresis), and thermal shutdown engages near 170°C - independent of junction temperature rating (TJ = +150°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Current Rating | 6.5 A typical peak limit ensures robust short-circuit protection without external sensing resistors. |
| Oscillator Frequency | 72 kHz nominal (62–79 kHz over −40°C to +85°C) enables compact magnetics while balancing EMI and efficiency. |
| Reference Voltage | 5.05 V ±2% at 25°C provides stable feedback threshold for precise output regulation in 5 V systems. |
| Input Voltage Range | 7.5 V to 40 V supports wide-input industrial and automotive battery-fed applications without pre-regulation. |
| Standby Supply Current | 36 µA at 12 V enables low-power sleep modes by clamping Pin 5 below 150 mV. |
| UVLO Threshold | 5.9 V startup with 0.9 V hysteresis prevents oscillatory enable/disable during brown-out conditions. |
| Operating Ambient Temp | −40°C to +85°C qualifies for under-hood automotive and industrial environments without derating. |
Pinout & Package
MC33167TV is housed in a 5-lead TO-220 package (Case 314B), with the metal tab electrically connected to Pin 3 (GND). The heatsink surface is terminal 6 in mechanical drawings but internally tied to Pin 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Compensation | Output of error amplifier; connects to RC network for loop stability tuning in all topologies. |
| Pin 2 | Switch Output | Collector of internal NPN power transistor; drives external inductor in step-down or inverter configurations. |
| Pin 3 | GND / Heatsink | Power ground and thermal path; tab must be soldered to PCB copper for thermal management (θJC = 5.0°C/W). |
| Pin 4 | VCC | Main supply input (7.5–40 V); powers internal circuitry and sets UVLO activation point. |
| Pin 5 | Feedback | Inverting input of error amplifier; referenced to internal 5.05 V; used to set output voltage via resistor divider. |
Key Features
| Feature | Design Value |
|---|---|
| Fixed-frequency oscillator | 72 kHz with on-chip capacitor eliminates external timing components and improves production consistency. |
| Integrated 5.05 V reference | ±2% accuracy at 25°C enables 5 V output regulation without external trimming in cost-sensitive designs. |
| Cycle-by-cycle current limiting | 6.5 A typical trip point protects switch during overload without requiring sense resistor or external comparator. |
| Low-power standby mode | 36 µA supply current at 12 V reduces system idle power when Pin 5 is held <150 mV. |
| Thermal shutdown | Activates near 170°C to prevent permanent damage during sustained overload or poor heatsinking. |
Applications
| Automotive Body Control Module | Industrial PLC I/O Power Supply |
|---|---|
Use Scenario: Regulating 12 V battery input to stable 5 V for microcontroller, CAN transceiver, and sensor interface circuits in harsh under-hood environments. IC Role / Device Role / Timing Role: Primary step-down controller with integrated switch, providing regulated 5 V at up to 5 A with built-in thermal and current protection. Use Value: Eliminates need for external MOSFET and gate driver; −40°C to +85°C rating ensures reliability across vehicle lifecycle. |
Use Scenario: Generating isolated 5 V and −12 V rails from 24 V DC bus in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Dual-rail controller implementing step-down and voltage-inverting topologies on single board with shared oscillator timing. Use Value: Reduces component count vs. dual-controller solution; 72 kHz frequency allows use of standard off-the-shelf inductors. |
| Off-Line AC/DC Preconverter | Brushed DC Motor Speed Control |
Use Scenario: Front-end 24 V pre-regulator fed from transformer-rectified AC line in distributed power architecture. IC Role / Device Role / Timing Role: High-efficiency step-down stage following self-oscillating flyback; handles 125 W total power with 90% efficiency. Use Value: Enables isolation and safety compliance upstream while delivering clean, regulated bus for downstream MC33167TV post-regulators. |
Use Scenario: Variable-speed control of 18 V brushed motor using EMF feedback to maintain constant RPM under load. IC Role / Device Role / Timing Role: PWM generator with analog feedback loop; regulates average motor voltage via duty cycle modulation. Use Value: Delivers ±1% speed regulation across 12–24 V input range without encoder; leverages internal error amp for closed-loop stability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2596-5.0 | Fixed 5 V output (non-adjustable), 3 A switch current, 150 kHz switching frequency, no inverting capability. | Limited to step-down only; lacks voltage-inverting and step-up/down modes supported by MC33167TV. | Choose LM2596-5.0 for simpler 5 V/3 A step-down needs where topology flexibility and higher current are not required. |
| UC3843BD1R2G | Current-mode controller (not integrated switch), requires external MOSFET, 275 kHz max frequency, no built-in reference or UVLO hysteresis. | Demands full external power stage design; lacks integrated thermal shutdown and cycle-by-cycle limiting of MC33167TV. | Choose UC3843BD1R2G when designing custom high-frequency converters needing external FET control and adjustable frequency. |
Compared with LM2596-5.0 and UC3843BD1R2G, the MC33167TV offers unique integration of 5.0 A switch, inverting topology support, and automotive-grade temperature range - enabling fewer components in multi-rail industrial supplies and eliminating external current-sense circuitry required by current-mode alternatives.
Availability
MC33167TV is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC power supplies, off-line preconverters, and brushed motor controllers requiring stable component supply across extended temperature ranges.
Supply support for MC33167TV 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 is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications.
The MC33167TV belongs to onsemi's legacy monolithic switching regulator product line, engineered for cost-effective, robust dc-dc conversion in automotive and industrial environments where reliability under thermal stress and wide input voltage range are critical.
FAQ
What is the maximum output current capability of the MC33167TV?
The MC33167TV features an internal NPN power switch rated for 5.0 A continuous output current, with cycle-by-cycle current limiting triggered at 6.5 A typical peak. Actual deliverable current depends on thermal management: with proper heatsinking (θJA ≤ 65°C/W), it sustains ≥5 A in step-down configuration at 25°C ambient. Derating applies above 70°C ambient per datasheet thermal curves.
Can the MC33167TV be used in voltage-inverting configurations?
Yes, the MC33167TV supports voltage-inverting topologies as confirmed in Figure 23 of its datasheet. It achieves negative output by re-referencing the IC ground pin to the negative rail, enabling regulation of −12 V at 1.7 A. This configuration leverages the same 72 kHz oscillator and error amplifier, with design equations provided in Table 1 for inverting mode.
Does the MC33167TV require external compensation components?
Yes, external compensation is mandatory for stability. The MC33167TV's error amplifier output (Pin 1) requires an RC network (RF, CF) between Pins 1 and 5, plus a feedback resistor (R2) from output to Pin 5. Datasheet Figures 19–23 specify values for step-down, step-up/down, and inverting modes - omitting these causes oscillation or poor transient response.
What is the purpose of the standby mode in the MC33167TV?
Standby mode reduces the MC33167TV's supply current to 36 µA by clamping Pin 5 (feedback) below 150 mV, disabling PWM operation while retaining bias for fast wake-up. This feature is used in battery-powered systems to extend idle time - e.g., automotive modules entering sleep mode after ignition-off, where low quiescent current directly impacts battery drain.
Is the MC33167TV still in active production?
No - per onsemi's datasheet page 16, MC33167TVG (the Pb-free TO-220 variant) is marked "DISCONTINUED" and "not recommended for new design." However, Aetrix Electronics maintains legacy inventory and provides lifecycle support including cross-reference guidance, obsolescence mitigation, and drop-in alternatives for existing production programs.
MC33167TV Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-220-5 Formed Leads
- Packaging:
- Tube
- Product Status:
- Obsolete
- 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
MC33167TV FAQ
1.How can I place an order for MC33167TV through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33167TV 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 MC33167TV reliable?
The price and inventory of MC33167TV are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33167TV is usually 5 days.
3.What payment methods are accepted for MC33167TV?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33167TV transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33167TV?
MC33167TV orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33167TV 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 MC33167TV?
For technical support, including MC33167TV datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33167TV requirements.
6.How does Aetrix verify that MC33167TV is sourced from the original manufacturer or authorized distributors?
All MC33167TV 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 MC33167TV meets industry standards.
7.What is the process for return or replacement of MC33167TV?
All MC33167TV units undergo pre-shipment inspection (PSI). If there is an issue with MC33167TV, 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 MC33167TV part is unused and in its original packaging.
Return procedure for MC33167TV:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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