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onsemi MC33267D2TR4
- Part No.:
- MC33267D2TR4
- Manufacturer:
- onsemi
- Package:
- -
- Datasheet:
-
MC33267D2TR4.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
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Inventory:10,400
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Product details
Overview
MC33267D2TR4 from ON Semiconductor (formerly Motorola) is a 5.0 V fixed-output, low-dropout linear regulator with integrated power-up reset functionality, rated for 500 mA output current, 0.58 V typical dropout at 500 mA, and –40 °C to +105 °C operating junction temperature. It delivers stable 5 V supply to microprocessor-based industrial control systems where battery life extension and reliable power sequencing are critical.
For engineers reviewing the MC33267D2TR4 datasheet, pinout, applications, or equivalent options, key selection considerations include its programmable reset delay timing, thermal shutdown protection, TO-263 (D2PAK) surface-mount package with heatsink-connected ground pin, and compatibility with 100 µF/≤0.3 Ω ESR output capacitors for stability.
Technical Context
The MC33267D2TR4 integrates a precision 5.0 V bandgap reference, current-limited pass transistor, thermal overload detector, and dual-comparator reset circuitry with independent delay and reset thresholds (4.8–4.92 V delay threshold, 3.6–4.0 V reset threshold). Its internal 20 µA delay current source charges an external capacitor to set reset timeout.
It operates as a single-supply, five-terminal LDO requiring no external compensation beyond the specified 100 µF output capacitor (ESR ≤ 0.3 Ω), and features sink-only active-low reset output with 0.2 V saturation voltage at 10 mA load - enabling direct interface with TTL/CMOS microprocessor reset inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 5.0 V ±2% (4.9–5.2 V over –40 °C to +125 °C), ensuring logic-level compliance for 5 V microcontrollers. |
| Dropout Voltage | 0.58 V typ. at 500 mA (max 0.8 V), enabling regulation from 5.58 V input - critical for single-cell LiFePO₄ or multi-cell alkaline battery systems. |
| Reset Threshold | 3.6–4.0 V (typ. 3.8 V), guaranteeing clean deassertion only after regulated output stabilizes above microprocessor minimum supply voltage. |
| Delay Threshold | VO – 0.15 V min (e.g., 4.85 V at VO = 5.0 V), triggering reset release only when output rises sufficiently above nominal. |
| Thermal Resistance | RθJC = 5.0 °C/W (D2PAK vertical mount), enabling >3 W dissipation with minimal heatsink - suitable for high-current industrial modules. |
| Ripple Rejection | 60–80 dB at 120 Hz, suppressing line-frequency noise from unregulated DC supplies or rectified AC adapters. |
| Operating Temp | –40 °C to +105 °C (TJ), validated for extended-life deployment in automotive body electronics and factory automation. |
Pinout & Package
MC33267D2TR4 uses the D2PAK (TO-263-5) plastic surface-mount package (Case 936A), with heatsink surface electrically connected to Pin 3 (Ground) for enhanced thermal performance in compact PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. VCC Input | Main power input | Accepts 6.0–28 V DC input; must be bypassed with ≥100 µF capacitor if located >4″ from bulk supply. |
| 2. Reset | Active-low open-collector reset output | Sinks up to 50 mA; held low until output exceeds reset threshold and delay capacitor charges to 3.8 V. |
| 3. Ground | Power and signal reference | Internally bonded to heatsink surface - requires large copper pour for thermal management and low-impedance return path. |
| 4. Delay | Delay capacitor connection | 20 µA current source charges external capacitor; delay time = CDLY × 3.8 V / 20 µA (e.g., 100 µF → ~19 s). |
| 5. Output | Regulated 5.0 V supply | Delivers up to 500 mA; requires 100 µF/≤0.3 Ω ESR output capacitor for stability across full temperature range. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip power-up reset with programmable delay | Eliminates need for external RC reset generators; delay set by single capacitor - reduces BOM count and layout area. |
| Low dropout voltage (0.58 V typ. @ 500 mA) | Extends usable battery voltage range by >0.5 V vs. standard 7805 regulators - directly increases runtime in portable equipment. |
| Internal current limiting & thermal shutdown | Protects against short-circuit and overload without external foldback circuitry - ensures robust operation in harsh environments. |
| Stable with low-ESR electrolytic capacitors | Supports cost-effective 100 µF/≤0.3 Ω ESR output caps instead of expensive tantalum or polymer types - lowers system cost. |
| Heatsink-connected ground pin (D2PAK) | Enables efficient heat transfer to PCB copper plane - achieves >3 W power dissipation without discrete heatsink in space-constrained designs. |
Applications
| Industrial PLC I/O Module | Automotive Body Control Unit |
|---|---|
Use Scenario: Powering 5 V microcontroller, CAN transceiver, and analog sensor interfaces in DIN-rail mounted control modules. IC Role / Device Role / Timing Role: Primary 5 V LDO with integrated reset for cold-start sequencing and brownout recovery. Use Value: Programmable reset delay ensures firmware initialization completes before peripheral enable signals assert - preventing bus contention. |
Use Scenario: Supplying 5 V rail to door module MCU and LIN transceiver in 12 V vehicle electrical system. IC Role / Device Role / Timing Role: Low-dropout regulator maintaining regulation during cranking (input dips to 6 V) while providing synchronized reset. Use Value: 0.58 V dropout enables continuous operation down to 5.58 V input - avoids MCU reset during engine start transient. |
| Portable Medical Monitor | Smart Energy Meter |
Use Scenario: Regulating 5 V for display controller and data acquisition ASIC powered by 3.7 V Li-ion with boost converter. IC Role / Device Role / Timing Role: Final-stage LDO delivering ultra-low-noise 5 V with guaranteed power-on reset assertion. Use Value: 80 dB ripple rejection suppresses switching noise from upstream boost converter - preserving ADC accuracy. |
Use Scenario: Providing isolated 5 V supply to metrology IC and real-time clock in utility-grade electricity meter. IC Role / Device Role / Timing Role: High-reliability LDO with thermal shutdown protecting against enclosure overheating in sealed outdoor enclosures. Use Value: RθJC = 5.0 °C/W allows >2.5 W dissipation on 2 oz. copper - eliminates need for external heatsink in conformal-coated PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar LDO regulator with reset applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM2950CT-5.0/NOPB | Fixed 5 V output, 100 mA max, no integrated reset; requires external reset IC or RC network. | Lacks on-chip reset - adds component count and board area; suitable only where reset timing is non-critical. | Select when cost sensitivity outweighs integration needs and load current ≤100 mA. |
| TPS76350DBVR | 5 V fixed output, 150 mA, integrated active-low reset, but no programmable delay - fixed 200 ms timeout. | Fixed delay limits flexibility in systems requiring longer reset hold times (e.g., FPGA configuration). | Choose for space-constrained designs needing basic reset where 200 ms suffices and current ≤150 mA. |
Compared with LM2950CT-5.0/NOPB and TPS76350DBVR, the MC33267D2TR4 uniquely combines 500 mA output, programmable reset delay, and D2PAK thermal performance - making it the only option supporting high-current industrial microcontrollers with precise power-sequencing requirements.
Availability
MC33267D2TR4 is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and portable medical devices requiring stable component supply with long-term manufacturability and consistent parametric performance.
Supply support for MC33267D2TR4 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The MC33267 series belongs to ON Semiconductor's legacy analog power IC portfolio, designed specifically for microprocessor-based systems requiring tightly regulated 5 V supply with guaranteed power-on reset - targeting cost-sensitive, high-reliability industrial and automotive applications.
FAQ
What is the maximum output current capability of the MC33267D2TR4?
The MC33267D2TR4 is rated for continuous output current up to 500 mA under specified thermal conditions. This rating assumes proper PCB copper heatsinking per the D2PAK package's RθJC = 5.0 °C/W specification and ambient temperature ≤+90 °C. At higher loads or elevated temperatures, internal current limiting engages to protect the device.
How does the reset function operate in the MC33267D2TR4?
The MC33267D2TR4 provides an active-low, open-collector reset output (Pin 2) that remains low whenever the regulated output voltage falls below 3.6–4.0 V. After power-up, once the output exceeds the delay threshold (~4.8 V), a 20 µA current source begins charging the external delay capacitor; reset releases only when capacitor voltage crosses 3.8 V - enabling precise, capacitor-programmable reset timing.
What output capacitor is required for stable operation of the MC33267D2TR4?
The MC33267D2TR4 requires a minimum 100 µF output capacitor with ESR ≤ 0.3 Ω for guaranteed stability across its full operating temperature range. While a 33 µF/≤3.0 Ω ESR capacitor may suffice in space-constrained applications, the 100 µF/0.3 Ω specification ensures robust phase margin and transient response - especially critical in battery-powered systems with variable load profiles.
Can the MC33267D2TR4 be used with input voltages below 6 V?
No - the MC33267D2TR4 requires a minimum input voltage of 6.0 V to maintain regulation, as specified in its Electrical Characteristics table. Below this, the output collapses regardless of dropout margin. For sub-6 V operation, a different LDO such as the MC78LC05 (which regulates down to 4.75 V input) would be required - the MC33267D2TR4 is not designed for ultra-low-input applications.
What is the thermal performance advantage of the D2PAK package used by the MC33267D2TR4?
The D2PAK (Case 936A) package of the MC33267D2TR4 features a heatsink surface internally connected to Pin 3 (Ground), achieving RθJC = 5.0 °C/W in vertical mounting. This allows >3 W power dissipation with only a moderate PCB copper area - significantly outperforming TO-220 variants (RθJC = 4.0 °C/W but requiring external heatsink) and enabling compact, fanless industrial designs where the MC33267D2TR4 is deployed.
MC33267D2TR4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- -
- Output Type:
- -
- Number of Regulators:
- -
- Voltage - Input (Max):
- -
- Voltage - Output (Min/Fixed):
- -
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- -
- Current - Quiescent (Iq):
- -
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
MC33267D2TR4 FAQ
1.How can I place an order for MC33267D2TR4 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33267D2TR4 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 MC33267D2TR4 reliable?
The price and inventory of MC33267D2TR4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33267D2TR4 is usually 5 days.
3.What payment methods are accepted for MC33267D2TR4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33267D2TR4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33267D2TR4?
MC33267D2TR4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33267D2TR4 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 MC33267D2TR4?
For technical support, including MC33267D2TR4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33267D2TR4 requirements.
6.How does Aetrix verify that MC33267D2TR4 is sourced from the original manufacturer or authorized distributors?
All MC33267D2TR4 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 MC33267D2TR4 meets industry standards.
7.What is the process for return or replacement of MC33267D2TR4?
All MC33267D2TR4 units undergo pre-shipment inspection (PSI). If there is an issue with MC33267D2TR4, 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 MC33267D2TR4 part is unused and in its original packaging.
Return procedure for MC33267D2TR4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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