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onsemi MC33565DR2G
- Part No.:
- MC33565DR2G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33565DR2G.pdf
- Description:
- IC REG LINEAR 3.3V 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,164
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Product details
Overview
MC33565DR2G from onsemi is a smart dual-input LDO voltage regulator designed for PCI/NIC peripheral card power management, enabling glitch-free 3.3 V supply transitions between active (5.0 V main) and sleep (3.3 V auxiliary) modes. It delivers 3.3 V ±2% regulation at up to 200 mA, features integrated low-voltage detection with 4.02 V/4.17 V thresholds and 150 mV hysteresis, and drives an external P-channel MOSFET for bypass operation. Used in ACPI-compliant computer interface cards.
For engineers reviewing the MC33565DR2G datasheet, pinout, applications, or equivalent options, key selection criteria include dual-supply seamless mode switching, reverse-current blocking during sleep, 3.3 V output accuracy over −5°C to +150°C, and SOIC-8 Pb-free packaging compatibility with PCIe slot power architectures.
Technical Context
The MC33565DR2G implements a hybrid regulation architecture: internal NPN-based LDO operates when main input (Pin 1) exceeds 4.02 V; below that threshold, it disables the LDO and asserts low-level drive on Pin 8 to turn on an external P-channel MOSFET, sourcing 3.3 V directly from the auxiliary input (Pin 3). The sense input (Pin 6) enables remote load regulation by closing the feedback loop at the load point.
Its low-voltage detector uses precision resistive divider and reference circuitry to generate hysteresis-controlled transitions, ensuring noise-immune mode switching without oscillation during supply ramp-up. Internal current limiting (~730 mA) and thermal shutdown (~170°C) protect against fault conditions without requiring external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Main Input Range | 4.3 V to 5.5 V - defines valid operating window for active-mode LDO regulation |
| Output Voltage | 3.3 V ±2% over −5°C to +150°C - ensures stable logic supply across industrial temperature range |
| Max Output Current | 200 mA - supports full-load operation of PCI/NIC card logic and PHY circuitry |
| Line Regulation | 1.5 mV typical - minimizes output variation during main supply ripple or sag |
| Load Regulation | 1.9 mV typical - maintains tight voltage control across 0–200 mA load step |
| Switch Drive Rise/Fall | 1.4 µs / 0.65 µs (CL = 1.2 nF) - enables fast, controlled MOSFET gate transitions during mode change |
| Reverse Leakage | 1.4 µA typical (Vin(M) = 0 V, Vout = 3.5 V) - prevents auxiliary rail discharge via main input path during sleep |
Pinout & Package
MC33565DR2G is housed in a Pb-free SOIC-8 (Case 751) package, 4.9 mm × 3.9 mm × 1.5 mm, with standard 1.27 mm pitch. Thermal resistance θJA = 146°C/W enables operation up to +150°C junction temperature with minimal heatsinking in card-edge applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Main Input) | Main 5.0 V supply input | Primary power source; triggers LDO regulation above 4.02 V threshold |
| 2, 5 (NC) | No connection | Not internally bonded - must remain unconnected per design |
| 3 (Auxiliary Input) | Auxiliary 3.3 V supply input | Backup source; powers load directly via external P-MOSFET when main input drops out |
| 4 (Gnd) | Power ground reference | Common return for regulator, detector, and drive circuits; requires low-impedance PCB plane |
| 6 (Sense Input) | Remote output voltage sensing | Connects directly to load to compensate for trace IR drop - mandatory for specified regulation accuracy |
| 7 (Regulator Output) | 3.3 V regulated output | Delivers up to 200 mA; routed separately from sense line to avoid coupling errors |
| 8 (Switch Drive) | P-MOSFET gate driver | Active-low signal: low = MOSFET ON (bypass), high = MOSFET OFF (LDO active) |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free sleep-to-active transition | Eliminates output voltage dip or overshoot during 5.0 V restoration, meeting ACPI instant-on requirements |
| Integrated low-voltage detector with hysteresis | 4.02 V lower / 4.17 V upper threshold provides 150 mV noise margin to prevent chatter during supply transients |
| Reverse current blocking | Internal NPN pass device limits reverse leakage to ≤25 µA, preserving auxiliary rail integrity during sleep mode |
| External P-MOSFET gate drive | Pin 8 delivers ≥15 mA sink/source peak current to rapidly switch common-gate P-channel devices like MGSF1P02ELT |
| Thermal shutdown protection | Disables output at ~170°C junction temperature - prevents catastrophic failure under sustained overload or poor airflow |
Applications
| PCI Express Interface Cards | Ethernet NIC Modules |
|---|---|
Use Scenario: Hot-pluggable network adapter operating in ACPI-defined S3/S4 sleep states while maintaining PHY link readiness. IC Role / Device Role / Timing Role: Smart power selector managing seamless switchover between motherboard 5.0 V slot power and onboard 3.3 V standby rail. Use Value: Ensures uninterrupted 3.3 V supply to Ethernet MAC/PHY during sleep-to-wake transitions, eliminating link retraining delays. | Use Scenario: Low-profile LAN card requiring stable 3.3 V for Gigabit PHY and controller ICs under variable load and ambient temperature. IC Role / Device Role / Timing Role: Dual-input LDO with remote sense delivering precision-regulated 3.3 V independent of PCB trace losses. Use Value: Maintains <±2% output accuracy from −5°C to +150°C, guaranteeing PHY compliance across extended industrial environments. |
| Industrial Peripheral Adapters | Embedded Computing Mezzanine Cards |
Use Scenario: DIN-rail mounted I/O expansion module powered from both system backplane (5.0 V) and local battery-backed 3.3 V rail. IC Role / Device Role / Timing Role: Fault-tolerant power supervisor enabling continuous operation during main supply interruption. Use Value: Prevents system reset by sustaining 3.3 V output via auxiliary rail within 0.65 µs of main input dropout. | Use Scenario: COM Express Type 7 carrier board supplying 3.3 V to FPGA-based processing modules with dynamic current draw. IC Role / Device Role / Timing Role: High-accuracy linear regulator with sense input compensating for voltage drop across power delivery network. Use Value: Achieves 1.9 mV load regulation across 0–200 mA steps, minimizing FPGA core voltage deviation during burst activity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP33565DR2G | Same die, identical electrical specs and pinout - direct onsemi rebranding post-acquisition | No functional difference; used interchangeably in new designs and legacy BOM updates | Select when sourcing from distributors listing NCP prefix; fully compatible with MC33565DR2G layout and firmware |
| TPS7A6033QDGNRQ1 | Single-input automotive-grade LDO (5.0 V only), no auxiliary input or switch drive; 3.3 V ±1% accuracy, 250 mA max | Lacks sleep-mode bypass capability - requires separate 3.3 V backup supply and external OR-ing FET control | Choose only if main supply is always present and thermal robustness (AEC-Q100 Grade 1) is prioritized over dual-rail autonomy |
Compared with NCP33565DR2G, the MC33565DR2G offers identical performance but reflects pre-acquisition part numbering; versus TPS7A6033QDGNRQ1, it uniquely integrates automatic dual-rail selection and MOSFET drive, eliminating discrete control logic and reducing solution size by >30% in peripheral card designs.
Availability
MC33565DR2G is available at Aetrix Electronics and suitable for PCI/NIC card manufacturing, industrial peripheral adapter production, and embedded computing mezzanine board development requiring stable component supply with guaranteed long-term continuity.
Supply support for MC33565DR2G 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 specializing in energy-efficient silicon solutions for automotive, industrial, cloud, and IoT applications.
The MC33565DR2G belongs to onsemi's Smart Power Management product line, engineered specifically for ACPI-compliant peripheral card power sequencing and seamless dual-rail operation in space-constrained edge computing platforms.
FAQ
What is the primary function of the MC33565DR2G in a PCI card design?
The MC33565DR2G serves as an intelligent dual-input voltage regulator that automatically switches between a 5.0 V main supply and a 3.3 V auxiliary supply to maintain uninterrupted 3.3 V output during sleep-to-active transitions. In the MC33565DR2G, this is achieved through internal LDO regulation during active mode and external P-MOSFET bypass during sleep mode - critical for meeting ACPI instant-on requirements in PCI/NIC cards.
Does the MC33565DR2G require external compensation components?
Yes, the MC33565DR2G requires an external 4.7 µF minimum output capacitor with ESR ≤500 mΩ for loop stability. The datasheet specifies this capacitor must be placed close to Pins 6 and 7, and increasing capacitance improves load transient response. No additional compensation network is needed - the MC33565DR2G integrates all internal compensation.
Can Pins 2 and 5 of the MC33565DR2G be connected to ground or left floating?
Pins 2 and 5 of the MC33565DR2G are explicitly marked NC (no connection) and are not internally bonded. They must remain unconnected - neither grounded nor tied to any voltage. Connecting them may cause unpredictable behavior or damage, as confirmed in the official MC33565DR2G datasheet Pin Assignments section.
How does the MC33565DR2G prevent reverse current flow during sleep mode?
The MC33565DR2G prevents reverse current using its internal NPN pass transistor architecture, which inherently blocks conduction from output to main input. Measured reverse leakage is ≤25 µA at 25°C, ensuring the auxiliary 3.3 V rail remains isolated and stable when the main 5.0 V supply is absent - a key feature documented in the MC33565DR2G Electrical Characteristics table.
Is the MC33565DR2G RoHS compliant and halogen-free?
Yes, the MC33565DR2G is Pb-free and RoHS compliant, as indicated by the "G" suffix in its part number and confirmed in the Ordering Information table. onsemi's documentation states that "Pb−Free Packages are Available", and the device meets JEDEC JS709D and IPC-1752A requirements for halogen-free materials per the MC33565DR2G packaging specification.
MC33565DR2G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 10 mA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- -
- Protection Features:
- Over Temperature, Short Circuit
- Operating Temperature:
- -5°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
MC33565DR2G FAQ
1.How can I place an order for MC33565DR2G through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33565DR2G 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 MC33565DR2G reliable?
The price and inventory of MC33565DR2G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33565DR2G is usually 5 days.
3.What payment methods are accepted for MC33565DR2G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33565DR2G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33565DR2G?
MC33565DR2G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33565DR2G 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 MC33565DR2G?
For technical support, including MC33565DR2G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33565DR2G requirements.
6.How does Aetrix verify that MC33565DR2G is sourced from the original manufacturer or authorized distributors?
All MC33565DR2G 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 MC33565DR2G meets industry standards.
7.What is the process for return or replacement of MC33565DR2G?
All MC33565DR2G units undergo pre-shipment inspection (PSI). If there is an issue with MC33565DR2G, 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 MC33565DR2G part is unused and in its original packaging.
Return procedure for MC33565DR2G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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