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onsemi MC33167D2TG
- Part No.:
- MC33167D2TG
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
MC33167D2TG.pdf
- Description:
- IC REG BUCK BST ADJ 5.5A D2PAK-5
- Quantity:
- Payment:
- Shipping:
Inventory:100
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Product details
Overview
MC33167D2TG 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 5.05 V ±2% reference, 72 kHz oscillator, latching PWM controller, high-gain error amplifier, and 5.0 A output switch - enabling compact, low-component-count power supplies operating from 7.5 V to 40 V input. It is used in automotive body electronics, industrial control power rails, and embedded system auxiliary supplies.
For engineers reviewing the MC33167D2TG datasheet, pinout, applications, or equivalent options, key selection considerations include its −40°C to +85°C operating range, D2PAK surface-mount package, cycle-by-cycle current limiting (6.5 A typ), undervoltage lockout with hysteresis (5.9 V startup / 0.9 V hysteresis), and thermal shutdown protection.
Technical Context
The MC33167D2TG implements voltage-mode control using an internal 72 kHz oscillator with fixed charge/discharge thresholds (4.1 V/2.3 V) and a latching PWM comparator that compares the error amplifier output against the oscillator ramp. Its error amplifier features 80 dB open-loop gain and 600 kHz unity-gain bandwidth, with non-inverting input tied internally to the 5.05 V reference.
Current protection uses cycle-by-cycle sensing via an internal trimmed resistor and comparator, resetting the PWM latch when peak switch current reaches 6.5 A (typ). The device enters standby mode (<36 µA supply current) when compensation pin voltage drops below 150 mV, and includes undervoltage lockout (5.9 V turn-on with 0.9 V hysteresis) and thermal shutdown (typically 170°C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Oscillator Frequency | 72 kHz nominal (62–79 kHz over temperature); sets minimum external timing capacitor value and defines maximum switching loss in layout. |
| Reference Voltage | 5.05 V ±2% at 25°C; enables precise 5.0 V output without external divider, compensating for typical 1% cable drop. |
| Output Switch Current | 6.5 A typical current limit threshold; supports ≥5.0 A continuous load in step-down configurations with proper heatsinking. |
| Input Voltage Range | 7.5 V to 40 V; allows direct operation from 12 V/24 V automotive or industrial bus rails without pre-regulation. |
| Operating Temperature | −40°C to +85°C ambient; qualified for under-hood automotive and industrial environments where extended thermal range is required. |
| Standby Supply Current | 36 µA at 12 V; enables low-power sleep modes in battery-backed systems by disabling regulation while preserving state. |
| UVLO Threshold | 5.9 V startup with 0.9 V hysteresis; prevents erratic startup during brown-out conditions and ensures full functionality before enable. |
Pinout & Package
D2PAK (Case 936A) surface-mount package with exposed thermal pad connected to Pin 3 (GND). Heatsink surface is electrically tied to Pin 3 and must be soldered to a thermal plane for reliable 5 A operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (Comp) | Compensation node | Connects to RC network (RF/CF) for loop stability; clamping below 150 mV activates standby mode. |
| Pin 2 (FB) | Voltage feedback input | Monitors regulated output via resistor divider; threshold = 5.05 V ±2%; no external reference needed. |
| Pin 3 (GND) | Power and signal ground | Common return for internal circuits, thermal pad connection point, and heatsink interface. |
| Pin 4 (VCC) | Power supply input | Accepts 7.5–40 V; powers internal circuitry and bias networks; UVLO monitors this pin. |
| Pin 5 (SW) | Switch output collector | Drives external inductor; rated for 40 V max, 5.0 A continuous; requires Schottky rectifier (e.g., 1N5825) in flyback paths. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 5.05 V ±2% reference | Eliminates external voltage reference IC and reduces BOM count in 5 V output designs. |
| 72 kHz fixed-frequency oscillator | Enables predictable EMI filtering and consistent magnetics design without frequency drift or spread-spectrum complexity. |
| Cycle-by-cycle current limiting | Provides robust short-circuit and overload protection without requiring external sense resistors or comparators. |
| Undervoltage lockout with hysteresis | Ensures clean startup and shutdown behavior across varying input conditions, preventing partial regulation. |
| Thermal shutdown (170°C typical) | Protects against catastrophic failure due to inadequate heatsinking or airflow loss in enclosed enclosures. |
| Low-power standby mode (36 µA) | Supports energy-efficient sleep states in automotive modules and IoT edge devices with battery backup. |
Applications
| Automotive Body Control Module (BCM) Power Rail | Industrial PLC Auxiliary 5 V Supply |
|---|---|
Use Scenario: Generating stable 5.0 V from a 12 V vehicle battery for microcontroller, CAN transceiver, and sensor interfaces. IC Role / Device Role / Timing Role: Primary step-down switching regulator controlling MOSFET Q1; provides regulated output with <±0.04% line regulation and 78.9% efficiency at 5 A. Use Value: Eliminates need for external reference and simplifies compensation with single-pole RC network, reducing PCB area by >30% vs discrete solutions. |
Use Scenario: Delivering isolated 5 V/3 A and −12 V/200 mA outputs from 24 V industrial bus for logic and analog subsystems. IC Role / Device Role / Timing Role: Core controller in triple-output inverting/step-down topology; regulates primary 5 V rail and enables transformer-coupled auxiliaries. Use Value: Achieves 84.2% total efficiency and <±0.03% 5 V line regulation while supporting multiple isolated outputs from one IC and shared magnetics. |
| Negative Input / Positive Output Converter | Variable-Speed Brush Motor Driver |
Use Scenario: Converting −12 V rail to +36 V/0.3 A for actuator drivers in dual-polarity industrial systems. IC Role / Device Role / Timing Role: Step-up/down controller driving external MTP3055EL MOSFET; handles negative input with polarity-reversed ground reference. Use Value: Enables bidirectional input capability without custom ICs; maintains 78.4% efficiency and ±0.38% line regulation despite inverted supply. |
Use Scenario: Regulating motor speed via EMF feedback in 18 V-powered brushed DC motors for HVAC actuators. IC Role / Device Role / Timing Role: Voltage-mode PWM controller adjusting duty cycle based on back-EMF sensing; delivers variable 0–3260 RPM output. Use Value: Provides closed-loop speed control without dedicated motor driver IC; achieves ±1% low-speed line regulation using internal error amp and reference. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MC34167D2TG | Same architecture and pinout; rated for 0°C to +70°C ambient (vs −40°C to +85°C for MC33167D2TG). | Suitable for commercial-grade applications only; not qualified for automotive or extended-temperature industrial use. | Select when cost sensitivity outweighs temperature range requirements and thermal derating is acceptable. |
| LM2596S-5.0 | Fixed 5.0 V output (non-adjustable), lower 3 A switch current rating, 150 kHz switching frequency, no standby mode. | Limited to basic step-down; lacks inverting/step-up-down capability and thermal/UVLO hysteresis. | Choose for simple, low-cost 5 V buck converters where multi-topology flexibility and extended temp range are unnecessary. |
Compared with MC34167D2TG and LM2596S-5.0, the MC33167D2TG offers broader operating temperature, higher output current headroom, multi-topology support, and active power management features - making it preferable for automotive and ruggedized industrial designs requiring reliability across environmental extremes.
Availability
MC33167D2TG is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC power rails, and embedded system auxiliary supplies requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MC33167D2TG 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 delivering energy-efficient silicon solutions for automotive, industrial, cloud, medical, and IoT applications, with leadership in power management and analog technologies.
The MC33167 series belongs to onsemi's legacy monolithic switching regulator product line, engineered specifically for robust, low-component-count DC-DC conversion in harsh environments - emphasizing thermal resilience, wide input range, and topology flexibility.
FAQ
What is the maximum continuous output current supported by the MC33167D2TG?
The MC33167D2TG supports up to 5.0 A continuous output current in step-down configurations when properly heatsinked and operated within its 7.5–40 V input range. Its 6.5 A typical current limit threshold provides headroom for transient loads, but sustained operation above 5.0 A requires careful thermal design per Figure 29's D2PAK copper-length derating curves.
Can the MC33167D2TG be used in voltage-inverting applications?
Yes, the MC33167D2TG is explicitly designed for voltage-inverting topologies, as confirmed in Figures 23 and 12 of the datasheet. It achieves regulated negative outputs (e.g., −12 V/1.7 A) by re-referencing the IC ground to the negative output rail, which reverses error amplifier polarity and keeps the switch emitter within safe −1.5 V limits relative to GND.
Does the MC33167D2TG require an external timing capacitor?
No, the MC33167D2TG features an internal fixed-frequency 72 kHz oscillator with on-chip timing components - eliminating the need for an external timing capacitor. This simplifies design, improves frequency stability over temperature, and reduces bill-of-materials count compared to adjustable-frequency controllers.
What package type does the MC33167D2TG use, and how is thermal management handled?
The MC33167D2TG uses the D2PAK (Case 936A) surface-mount package with an exposed thermal pad electrically connected to Pin 3 (GND). Effective thermal management requires soldering the pad to a minimum 25 mm² copper pour on the PCB; Figure 29 shows maximum power dissipation versus copper length, with 70°C/W junction-to-ambient resistance in free air.
How does the standby mode function on the MC33167D2TG?
The MC33167D2TG enters standby mode when the voltage at Pin 1 (Comp) falls below 150 mV, reducing supply current to 36 µA at 12 V. This feature enables low-power sleep states in battery-operated systems. Standby is exited automatically when Comp voltage rises above threshold, restoring full regulation without external sequencing.
MC33167D2TG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Tube
- Product Status:
- Last Time Buy
- 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:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
MC33167D2TG FAQ
1.How can I place an order for MC33167D2TG through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33167D2TG 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 MC33167D2TG reliable?
The price and inventory of MC33167D2TG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33167D2TG is usually 5 days.
3.What payment methods are accepted for MC33167D2TG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33167D2TG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33167D2TG?
MC33167D2TG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33167D2TG 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 MC33167D2TG?
For technical support, including MC33167D2TG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33167D2TG requirements.
6.How does Aetrix verify that MC33167D2TG is sourced from the original manufacturer or authorized distributors?
All MC33167D2TG 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 MC33167D2TG meets industry standards.
7.What is the process for return or replacement of MC33167D2TG?
All MC33167D2TG units undergo pre-shipment inspection (PSI). If there is an issue with MC33167D2TG, 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 MC33167D2TG part is unused and in its original packaging.
Return procedure for MC33167D2TG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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