My Inquiry
My Account
onsemi MC33565DR2
- Part No.:
- MC33565DR2
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MC33565DR2.pdf
- Description:
- IC REG LINEAR 3.3V 200MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,997
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MC33565DR2 from onsemi is a smart dual-input 3.3 V low-dropout voltage regulator with integrated low-voltage detection and external P-channel MOSFET switch drive, designed for glitch-free 5.0 V ↔ 3.3 V mode transitions in PCI/NIC peripheral cards. It delivers 3.3 V ±2% regulation at up to 200 mA, features 4.02 V/4.17 V hysteresis thresholds, and supports reverse-current blocking during sleep mode.
For engineers reviewing the MC33565DR2 datasheet, pinout, applications, or equivalent options, this page provides verified technical context, real-world timing behavior, load/line regulation values, thermal shutdown activation at 170°C, and validated alternative options for ACPI-compliant power management designs.
Technical Context
The MC33565DR2 implements a dual-supply architecture where internal LDO regulation operates above 4.02 V main input (5.0 V active mode), while below threshold it disables the LDO and asserts low-level gate drive (≤0.2 V) to enable an external P-channel MOSFET for bypass from auxiliary 3.3 V (sleep mode). Its low-voltage detector uses precision resistor-divider sensing with 150 mV hysteresis for noise immunity.
Regulation relies on remote sense feedback (Pin 6 connected directly to load), requiring ≥4.7 µF output capacitance with ≤500 mΩ ESR. The device integrates short-circuit protection (730 mA typical limit) and thermal shutdown without hysteresis, disabling output above 170°C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 3.3 V ±2% over −5°C to +150°C; ensures stable logic supply under full thermal range |
| Main Input Range | 4.3 V to 5.5 V; compatible with standard PCI 5 V rail tolerances |
| Auxiliary Input Range | −0.5 V to +7.0 V; supports 3.3 V standby rails with margin for transient overshoot |
| Load Regulation | ≤13.2 mV (0–200 mA); maintains tight voltage control across full load step |
| Line Regulation | ≤13.2 mV (4.3–5.5 V input); rejects input ripple and droop during system transitions |
| Switch Drive Rise/Fall | tDH ≤ 3.5 µs, tDL ≤ 3.5 µs (CL = 1.2 nF); enables fast MOSFET switching for sub-millisecond mode transition |
| Thermal Shutdown | Activates at ~170°C; protects against sustained overload without built-in hysteresis |
Pinout & Package
MC33565DR2 is housed in an SOIC-8 (Case 751) package with exposed pad not electrically connected. Pin 2 and Pin 5 are NC (no internal connection).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | Main Input | Connects to 5.0 V system rail; triggers LDO operation when >4.02 V |
| 2, 5 | No Connection | Not bonded internally; must remain unconnected on PCB |
| 3 | Auxiliary Input | Connects to 3.3 V standby rail; supplies output during main rail dropout |
| 4 | Gnd | Common ground reference for regulator, detector, and drive circuits |
| 6 | Sense Input | Remote feedback node; must connect directly to load for ±2% regulation accuracy |
| 7 | Regulator Output | 3.3 V regulated output; rated for 200 mA continuous, 750 mA short-circuit peak |
| 8 | Switch Drive | Gate driver for external P-MOSFET; sinks current to turn ON during sleep mode |
Key Features
| Feature | Design Value |
|---|---|
| Glitch-free mode transition | Zero-output-dip switching between 5 V LDO and 3.3 V bypass via controlled MOSFET gate drive |
| Reverse current blocking | Input-to-output leakage <25 µA at 0 V main input; prevents auxiliary rail loading during active mode |
| ACPI-compliant detection | 4.02 V lower / 4.17 V upper threshold with 150 mV hysteresis meets Intel/Microsoft/Toshiba instant-availability specs |
| Thermal & current protection | Integrated 730 mA current limit and 170°C thermal shutdown prevent catastrophic failure under fault conditions |
| Pb-free SOIC-8 packaging | RoHS-compliant lead finish; 2500-unit tape-and-reel format (DR2 suffix) |
Applications
| PCI Express Add-in Card Power Management | Ethernet NIC Sleep/Active Mode Switching |
|---|---|
|
Use Scenario: PCIe slot card transitions between full-power (5 V present) and low-power D3hot state (only 3.3 V_AUX available). IC Role / Device Role / Timing Role: MC33565DR2 monitors main rail, disables internal LDO, and drives external P-MOSFET within 3.5 µs to maintain uninterrupted 3.3 V supply. Use Value: Eliminates brownout resets during hot-plug or power-state transitions per PCIe specification. |
Use Scenario: Gigabit Ethernet NIC enters ACPI S3 suspend, retaining only 3.3 V_AUX while main 5 V is removed. IC Role / Device Role / Timing Role: MC33565DR2 detects main rail collapse, asserts low gate drive to enable bypass path, sustaining PHY and MAC logic supply. Use Value: Enables sub-100 ms wake-from-suspend while meeting IEEE 802.3az Energy Efficient Ethernet requirements. |
| Industrial I/O Module Dual-Rail Redundancy | Embedded Computer Peripheral Slot Interface |
|
Use Scenario: Programmable logic controller I/O module powered from redundant 5 V and 3.3 V sources for fail-safe operation. IC Role / Device Role / Timing Role: MC33565DR2 acts as automatic source selector-prioritizing 5 V for efficiency, falling back to 3.3 V without interruption. Use Value: Provides seamless switchover during primary supply failure, maintaining fieldbus communication integrity. |
Use Scenario: Compact embedded PC uses M.2 or mini-PCIe slots where mechanical constraints limit local regulation area. IC Role / Device Role / Timing Role: MC33565DR2 integrates detection, regulation, and MOSFET drive in single SOIC-8 footprint, reducing BOM count. Use Value: Saves board space vs. discrete supervisor + LDO + MOSFET solution while guaranteeing ±2% output accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-input 3.3 V regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP33565DR2G | Same pinout and electrical specs; Pb-free version with identical SOIC-8 packaging and 2500/reel tape format | Drop-in replacement for RoHS-compliant manufacturing; no design change required | Select when lead-free compliance is mandatory and same thermal performance is needed |
| TPS2113APWR | Single-chip ideal diode controller (no internal LDO); requires external 3.3 V LDO and dual MOSFETs for bidirectional path control | Supports higher current (>500 mA) but adds complexity; lacks integrated voltage regulation | Choose for high-current applications where external LDO already exists and precise 3.3 V regulation is handled elsewhere |
Compared with MC33565DR2, NCP33565DR2G offers identical functionality in a certified Pb-free package, while TPS2113APWR shifts regulation responsibility externally-enabling scalability but increasing component count and layout sensitivity.
Availability
MC33565DR2 is available at Aetrix Electronics and suitable for PCI/NIC card designs, industrial I/O modules, and embedded peripheral interfaces requiring stable component supply with guaranteed long-term manufacturability.
Supply support for MC33565DR2 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 power management, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The MC33565DR2 belongs to onsemi's Smart Power Management family, engineered specifically for ACPI-compliant peripheral card power sequencing where glitch-free 5 V ↔ 3.3 V transitions are critical to system reliability.
FAQ
What is the minimum output capacitance required for stable operation of the MC33565DR2?
The MC33565DR2 requires a minimum 4.7 µF output capacitor with ≤500 mΩ ESR for loop stability across temperature. Using lower capacitance or higher ESR risks oscillation and poor load transient response. The MC33565DR2 datasheet specifies 4.7 µF as absolute minimum; 10 µF tantalum or ceramic is recommended for improved performance in PCIe/NIC applications.
Does the MC33565DR2 support remote sense, and how must it be implemented?
Yes, the MC33565DR2 supports remote sense via Pin 6 (Sense Input), which must be connected directly to the load's 3.3 V node-not to Pin 7-to achieve ±2% regulation accuracy. The MC33565DR2 datasheet mandates separate routing for the sense trace, isolated from high-current paths, to avoid voltage drop errors. Failure to implement remote sense degrades output accuracy beyond specification.
Can the MC33565DR2 operate with only the auxiliary 3.3 V input and zero main input voltage?
Yes, the MC33565DR2 functions fully with Vin(M) = 0 V and Vin(A) = 3.3 V, delivering regulated 3.3 V output via the external P-MOSFET bypass path. In this condition, quiescent current is 1.9–3.0 mA (typical 1.9 mA), and reverse leakage from output to main input is <25 µA-ensuring no loading of the absent 5 V rail. This behavior is explicitly verified in the MC33565DR2 electrical characteristics table.
What is the purpose of Pins 2 and 5 on the MC33565DR2, and can they be tied to ground?
Pins 2 and 5 on the MC33565DR2 are No Connect (NC) terminals with no internal bonding-confirmed in the official pin assignments table. They must remain unconnected on the PCB; tying them to ground or any other net may cause unpredictable behavior or damage. The MC33565DR2 SOIC-8 layout accommodates these NC pins to maintain compatibility with legacy footprints and test fixtures.
How does the MC33565DR2 handle thermal overload, and is there hysteresis in its shutdown circuit?
The MC33565DR2 activates thermal shutdown at approximately 170°C junction temperature, disabling output until temperature falls below the trip point. Crucially, the MC33565DR2 thermal protection has no built-in hysteresis-so near-limit operation may cause output oscillation. Engineers must ensure adequate PCB copper area and airflow to keep TJ <150°C under worst-case load, as specified in the MC33565DR2 maximum ratings table.
MC33565DR2 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
MC33565DR2 FAQ
1.How can I place an order for MC33565DR2 through Aetrix?
Please submit a Request for Quotation (RFQ) for MC33565DR2 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 MC33565DR2 reliable?
The price and inventory of MC33565DR2 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC33565DR2 is usually 5 days.
3.What payment methods are accepted for MC33565DR2?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC33565DR2 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MC33565DR2?
MC33565DR2 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MC33565DR2 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 MC33565DR2?
For technical support, including MC33565DR2 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC33565DR2 requirements.
6.How does Aetrix verify that MC33565DR2 is sourced from the original manufacturer or authorized distributors?
All MC33565DR2 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 MC33565DR2 meets industry standards.
7.What is the process for return or replacement of MC33565DR2?
All MC33565DR2 units undergo pre-shipment inspection (PSI). If there is an issue with MC33565DR2, 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 MC33565DR2 part is unused and in its original packaging.
Return procedure for MC33565DR2:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MC33565DR2 Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
