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Microchip Technology MCP16331T-E/MNYVAO
- Part No.:
- MCP16331T-E/MNYVAO
- Manufacturer:
- Microchip Technology
- Package:
- 8-WFDFN Exposed Pad
- Datasheet:
-
MCP16331T-E/MNYVAO.pdf
- Description:
- IC REG BUCK ADJ 500MA 8TDFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,064
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Product details
Overview
MCP16331T-E/MNYVAO from Microchip Technology is a high-voltage, fixed-frequency, peak current-mode controlled step-down DC-DC converter with integrated 600 mΩ N-channel MOSFET switch. It operates from 4.4V to 50V input, delivers up to 500 mA output current, regulates output voltage from 2.0V to 24V with ±2% accuracy, and features internal soft start, UVLO (4.1V start/3.6V stop), and overtemperature protection. It is used in automotive power supplies for PIC® microcontrollers and industrial 24V/48V DC-DC conversion.
For engineers reviewing the MCP16331T-E/MNYVAO datasheet, MCP16331T-E/MNYVAO pinout, MCP16331T-E/MNYVAO application, or MCP16331T-E/MNYVAO equivalent, key selection criteria include input voltage range (4.4–50V), output current capability at specific VOUT/VIN combinations, thermal resistance of the SOT-23 package (190.5°C/W), and compatibility with ceramic output capacitors without external compensation.
Technical Context
The MCP16331T-E/MNYVAO implements a non-synchronous buck topology with fixed 500 kHz switching frequency and peak current-mode control architecture. Its internal high-side N-channel MOSFET requires bootstrap drive via the BOOST pin, supplied by an external capacitor charged through the SW node during freewheeling.
It integrates internal compensation, undervoltage lockout with 0.5V hysteresis, cycle-by-cycle current limiting (1.3A typ), and thermal shutdown at 160°C with 30°C hysteresis. The device uses a precise 0.800V feedback reference and supports adjustable output voltage via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.4V to 50V - supports wide industrial and automotive supply rails including 12V, 24V, and 48V systems. |
| Output Voltage Range | 2.0V to 24V - programmable via external resistor divider; enables single IC to serve multiple rail requirements. |
| Feedback Reference Voltage | 0.800V ±2% - sets output accuracy; determines VOUT = 0.8 × (1 + RTOP/RBOT). |
| Switching Frequency | 500 kHz ±75 kHz - enables compact magnetics and filtering; fixed frequency simplifies EMI design. |
| Max Continuous Output Current | 500 mA - guaranteed across full input range; up to 1.2A at 3.3V/5V VOUT with VIN > 12V in SOT-23 at +25°C ambient. |
| UVLO Threshold | 4.1V start / 3.6V stop - prevents erratic operation during brown-out; 0.5V hysteresis avoids oscillation near threshold. |
| Thermal Shutdown | 160°C activation / 130°C recovery - protects die under overload or poor PCB thermal design; ensures safe fault recovery. |
Pinout & Package
Package: 6-Lead SOT-23 (MCP16331T-E/MNYVAO is the SOT-23 variant per Microchip's ordering code suffix "T" and package designation in DS20005308D).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN | Power supply input | Accepts 4.4–50V DC; must be decoupled with 4.7–20 µF ceramic capacitor close to pin. |
| SW | Switch node | Connects internally to N-MOSFET drain; externally to inductor and Schottky diode cathode. |
| GND | Ground reference | Common return for input/output capacitors and feedback network; shortest possible trace required. |
| VFB | Feedback input | Senses 0.800V reference; connects to resistor divider midpoint to set regulated VOUT. |
| EN | Enable control | Logic-high enables operation; internal pull-up allows startup with floating EN; logic-low disables switching. |
| BOOST | Bootstrap supply | Drives high-side N-MOSFET gate; requires 100 nF capacitor between BOOST and SW pins. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 600 mΩ N-Channel MOSFET | Reduces external component count and conduction losses; eliminates need for external high-side driver. |
| Internal compensation | Removes requirement for external compensation network; simplifies design and improves stability across operating conditions. |
| Stable with ceramic capacitors | Enables use of low-ESR, small-footprint MLCCs for input/output filtering-no electrolytic or tantalum needed. |
| Peak current-mode control | Provides fast transient response and inherent cycle-by-cycle current limiting; reduces output filter complexity. |
| Internal soft start (600 µs) | Controls output voltage ramp rate to limit inrush current and prevent overshoot during power-up. |
Applications
| PIC® Microcontroller Bias Supply | Industrial 24V/48V DC-DC Conversion |
|---|---|
Use Scenario: Powering 3.3V or 5V logic rails for PIC® MCUs in automotive body control modules or industrial PLC I/O cards. IC Role / Device Role / Timing Role: Primary step-down regulator converting battery or bus voltage to stable MCU core/io supply. Use Value: AEC-Q100 qualification ensures reliability in automotive environments; 500 mA output supports multiple peripherals on same rail. | Use Scenario: Converting 24V or 48V factory floor power to 5V/12V for sensors, actuators, and communication interfaces. IC Role / Device Role / Timing Role: High-input-voltage buck converter delivering isolated, regulated secondary rails from unregulated industrial bus. Use Value: 50V absolute max rating and 4.4V UVLO enable robust operation across wide input transients common in industrial settings. |
| DSL/Cable Modem Power | SLA Battery-Powered Devices |
Use Scenario: Generating 3.3V and 12V rails in broadband access equipment powered from AC/DC adapters. IC Role / Device Role / Timing Role: Secondary DC-DC stage regulating adapter-derived 12V–24V down to logic and analog supply voltages. Use Value: 96% peak efficiency minimizes heat in sealed enclosures; fixed 500 kHz frequency eases EMI filtering compliance. | Use Scenario: Powering portable test instruments or remote monitoring nodes using sealed lead-acid (SLA) batteries (12V–24V nominal). IC Role / Device Role / Timing Role: Main regulator stepping down SLA battery voltage to stable 3.3V/5V for microcontroller and sensor subsystems. Use Value: Low 6 µA shutdown current extends battery life during standby; UVLO prevents deep discharge damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5164QDDARQ1 | 4.5–65V input, 1.5A output, requires external MOSFET; no integrated switch; higher IQ (2.1 mA active) | Used where higher output current or wider input range is required; not drop-in due to different pinout and external FET layout | Select when >500 mA load or >50V input is needed; accept added complexity for scalability. |
| TPS54202DRCT | 4.5–28V input, 2A output, integrated FET, 500 kHz, but lower max input voltage and no AEC-Q100 rating | Targeted at consumer/commercial applications; lacks automotive qualification and high-voltage tolerance | Choose for cost-sensitive non-automotive designs needing higher current in smaller footprint; verify UVLO and thermal limits. |
Compared with LM5164QDDARQ1 and TPS54202DRCT, the MCP16331T-E/MNYVAO offers AEC-Q100 qualification, 50V input capability, and SOT-23 simplicity for ≤500 mA loads-making it optimal for space-constrained automotive and industrial bias supplies where integration and reliability outweigh raw current headroom.
Availability
MCP16331T-E/MNYVAO is available at Aetrix Electronics and suitable for automotive electronics, industrial power supplies, and DSL/cable modem designs requiring stable component supply, AEC-Q100 compliance, and high-voltage DC-DC conversion.
Supply support for MCP16331T-E/MNYVAO 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
Microchip Technology is a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions, serving automotive, industrial, communications, and consumer markets with high-reliability silicon and development tools.
The MCP16331 product line delivers compact, high-efficiency step-down regulators for space- and thermal-constrained applications where integrated high-voltage switching, AEC-Q100 qualification, and minimal external components are critical.
FAQ
What is the maximum output current capability of the MCP16331T-E/MNYVAO at 12V input and 5V output?
The MCP16331T-E/MNYVAO delivers up to 1.2A output current at 5V output with VIN > 12V and +25°C ambient temperature in the SOT-23 package. At 12V input specifically, Figure 2-9 confirms ≥1.0A capability. Derating applies above +25°C due to thermal resistance of 190.5°C/W in the SOT-23 package.
Does the MCP16331T-E/MNYVAO require external compensation components?
No, the MCP16331T-E/MNYVAO includes internal compensation for its peak current-mode control loop. No external compensation network is required-only the feedback resistor divider, input/output capacitors, inductor, Schottky diode, and BOOST capacitor are needed to implement a complete buck regulator.
Can the MCP16331T-E/MNYVAO operate with an output voltage of 24V?
Yes, the MCP16331T-E/MNYVAO supports output voltages up to 24V, as confirmed in the General Description and Electrical Characteristics table. To achieve 24V output, configure the feedback resistor divider so that VFB = 0.800V at regulation; minimum input must exceed 24V + headroom (typically >26V).
What is the purpose of the BOOST pin on the MCP16331T-E/MNYVAO?
The BOOST pin supplies gate drive voltage to the internal high-side N-channel MOSFET. It must be connected to a 100 nF capacitor between BOOST and SW. During off-time, the capacitor recharges from the output (or auxiliary source); during on-time, it provides the elevated voltage needed to fully enhance the N-FET gate relative to its source (SW node).
Is the MCP16331T-E/MNYVAO qualified for automotive applications?
Yes, the MCP16331T-E/MNYVAO passes Automotive AEC-Q100 Reliability Testing, as explicitly stated in the Features section of DS20005308D. This qualification covers temperature cycling, HTOL, ESD, and other stress tests required for automotive electronic control units.
MCP16331T-E/MNYVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 8-WFDFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.4V
- Voltage - Input (Max):
- 50V
- Voltage - Output (Min/Fixed):
- 2V
- Voltage - Output (Max):
- 24V
- Current - Output:
- 500mA
- Frequency - Switching:
- 500kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-TDFN (2x3)
MCP16331T-E/MNYVAO FAQ
1.How can I place an order for MCP16331T-E/MNYVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16331T-E/MNYVAO 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 MCP16331T-E/MNYVAO reliable?
The price and inventory of MCP16331T-E/MNYVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16331T-E/MNYVAO is usually 5 days.
3.What payment methods are accepted for MCP16331T-E/MNYVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16331T-E/MNYVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16331T-E/MNYVAO?
MCP16331T-E/MNYVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16331T-E/MNYVAO 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 MCP16331T-E/MNYVAO?
For technical support, including MCP16331T-E/MNYVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16331T-E/MNYVAO requirements.
6.How does Aetrix verify that MCP16331T-E/MNYVAO is sourced from the original manufacturer or authorized distributors?
All MCP16331T-E/MNYVAO 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 MCP16331T-E/MNYVAO meets industry standards.
7.What is the process for return or replacement of MCP16331T-E/MNYVAO?
All MCP16331T-E/MNYVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP16331T-E/MNYVAO, 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 MCP16331T-E/MNYVAO part is unused and in its original packaging.
Return procedure for MCP16331T-E/MNYVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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