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Microchip Technology MCP16361T-E/NMXVAO
- Part No.:
- MCP16361T-E/NMXVAO
- Manufacturer:
- Microchip Technology
- Category:
- DC DC Switching Controllers
- Package:
- -
- Datasheet:
-
MCP16361T-E/NMXVAO.pdf
- Description:
- IC INPUT BUCK CONVERTER 48V 2MHZ
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Product details
Overview
MCP16361T-E/NMXVAO from Microchip Technology is a 48V-input, 3A synchronous buck DC-DC converter with integrated 100 mΩ N-channel high-side MOSFET, fixed 2.2 MHz switching frequency, and automatic PFM/PWM mode selection. It delivers regulated output voltages from 2.0V to 24V and is used in automotive 48V systems, industrial 24V DC-DC conversion, and microcontroller bias supplies.
For engineers reviewing the MCP16361T-E/NMXVAO datasheet, MCP16361T-E/NMXVAO pinout, MCP16361T-E/NMXVAO application, or MCP16361T-E/NMXVAO equivalent, key selection criteria include its 4.0–48V input range, 0.800 V feedback reference, 5 µA shutdown current, internal peak current mode control, and wettable-flank 8-lead 3×3 mm VDFN package for automated optical inspection.
Technical Context
The MCP16361T-E/NMXVAO implements fixed-frequency (2.2 MHz) peak current mode control with internal slope compensation, enabling fast transient response and stable regulation across wide VIN and VOUT ranges. Its architecture integrates an internal 0.800 V reference, soft-start (750 µs), undervoltage lockout (UVLO start = 4.0 V), and overtemperature protection (155°C trip).
It supports automatic PFM/PWM mode transition: PFM dominates at light loads (<250 mA typical) to minimize quiescent current (18 µA non-switching), while PWM ensures consistent frequency and low ripple under heavy load. The BOOST/BD pins enable self-powered high-side gate drive using an external bootstrap capacitor charged from VOUT or a 3–5.5 V source.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 4.0 V to 48 V - Supports automotive transients up to 48 V and industrial 24 V rails without external pre-regulation. |
| Output Voltage Range | 2.0 V to 24 V - Set via external resistor divider; 0.800 V feedback reference enables precise regulation across full range. |
| Switching Frequency | 2.2 MHz (fixed) - Enables use of small 1.5–2.2 µH inductors and compact ceramic output capacitors (e.g., 2 × 22 µF). |
| Max Output Current | 3 A continuous - Sustained with thermal management; peak switch current limit is 4.5 A. |
| Quiescent Current | 18 µA (non-switching, PFM mode) - Minimizes standby power loss in battery-backed or always-on systems. |
| Shutdown Current | 5 µA typical - Allows deep sleep during system idle; EN pin controls entry/exit with logic-level threshold (VIH = 1.8 V). |
| Thermal Protection | 155°C shutdown with 25°C hysteresis - Prevents permanent damage; resumes operation at 125°C after cooling. |
Pinout & Package
Package: 8-lead 3×3 mm wettable flanks VDFN with exposed thermal pad (EP), optimized for thermal dissipation and AOI-compatible solder joint inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VIN (Pin 1) | Input supply voltage | Connects to drain of internal N-MOSFET; requires local 10 µF+ ceramic decoupling to GND for EMI and stability. |
| EN (Pin 2) | Enable control input | Logic-high (>1.8 V) enables regulation; floating not allowed; pulls device into 5 µA shutdown when low. |
| FB (Pin 3) | Feedback node | Senses resistor divider output; regulates VOUT to 0.800 V reference; ±0.016 V tolerance over temperature. |
| PG (Pin 4) | Power Good open-drain output | Asserts high (via external pull-up) when VOUT reaches 93% of setpoint; provides system power sequencing signal. |
| GND (Pin 5) | Signal and power ground | Common return for VIN, VOUT, and internal circuitry; EP must be connected to same ground plane via thermal vias. |
| BD (Pin 6) | Bootstrap diode anode | Connected to VOUT (if 3–5.5 V) or auxiliary 3–5.5 V rail; supplies charge path to BOOST capacitor during SW off-time. |
| BOOST (Pin 7) | High-side gate driver supply | Drives internal N-MOSFET gate; requires 330 nF ceramic capacitor between BOOST and SW for reliable switching. |
| SW (Pin 8) | Switch node | Internal source of high-side MOSFET; connects externally to inductor, Schottky diode, and BOOST capacitor - must be minimized for EMI. |
| EP (Pin 9) | Exposed thermal pad | Internally tied to GND; mandatory connection to PCB ground plane with ≥4 thermal vias for thermal performance and reliability. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 100 mΩ N-MOSFET | Eliminates external high-side switch; reduces BOM count and layout area while maintaining >90% efficiency at 3 A. |
| Automatic PFM/PWM mode | Optimizes efficiency across load range: PFM extends battery life at light loads; PWM ensures predictable EMI at full load. |
| Internal compensation | Removes need for external compensation network; supports stable operation with standard 1.5–2.2 µH inductors and ceramic caps. |
| Power Good (PG) output | Provides system-level power sequencing and fault indication without external monitoring circuitry. |
| Wettable flanks VDFN | Enables automated optical inspection (AOI) of solder joints on bottom leads - critical for automotive and industrial manufacturing. |
Applications
| Automotive 48V Systems | Industrial 24V DC-DC Conversion |
|---|---|
Use Scenario: Powering ADAS sensors, infotainment ECUs, and body control modules from a 48V mild-hybrid bus with 48V transients. IC Role / Device Role / Timing Role: Primary step-down regulator converting 48V nominal (up to 58V transient) to 3.3V/5V/12V MCU and peripheral rails. Use Value: 48V input rating and UVLO hysteresis (0.5 V) prevent brownout resets during load dump; 2.2 MHz switching avoids AM radio band. |
Use Scenario: Converting 24V factory automation input to isolated 5V logic rails for PLC I/O modules and fieldbus interfaces. IC Role / Device Role / Timing Role: Local point-of-load regulator delivering 3A at 5V with tight line/load regulation (±0.3% load reg, ±0.01%/V line reg). Use Value: Integrated current limit (4.5 A) and thermal shutdown protect against short-circuit faults in unattended machinery environments. |
| Microcontroller Bias Supply | SLA Battery-Powered Devices |
Use Scenario: Providing clean, low-noise 3.3V supply for ARM Cortex-M7 microcontrollers in edge gateway devices. IC Role / Device Role / Timing Role: Primary bias regulator with soft-start (750 µs) preventing inrush-induced reset during cold boot. Use Value: 18 µA quiescent current extends runtime in sleep modes; PG output synchronizes firmware initialization with stable VDD. |
Use Scenario: Regulating power for portable medical monitors or security sensors powered by sealed lead-acid (SLA) batteries (6–14 V range). IC Role / Device Role / Timing Role: Efficient buck converter maintaining 5V output as battery discharges from 13.8V to 6.0V. Use Value: Wide 4–48V input range accommodates SLA discharge curve without dropout; PFM mode sustains >85% efficiency below 50 mA. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16362T-E/NMXVAO | PWM-only mode (no PFM); identical 2.2 MHz frequency, 3A rating, and pinout. | Better suited for noise-sensitive applications where variable-frequency PFM ripple is unacceptable. | Select when deterministic EMI profile and minimal output voltage ripple at light load are required. |
| LM5164QDGSRQ1 | 4.5–65V input, 1.5A, 2.1 MHz, integrated FET but no PFM; AEC-Q100 qualified. | Designed specifically for automotive; includes spread-spectrum and enhanced fault reporting. | Choose for automotive production requiring AEC-Q100 qualification and higher input voltage margin beyond 48V. |
Compared with MCP16361T-E/NMXVAO, the MCP16362T-E/NMXVAO eliminates PFM-related output ripple but sacrifices light-load efficiency, while the LM5164QDGSRQ1 adds automotive qualification and wider VIN at reduced current capability - making MCP16361T-E/NMXVAO optimal for cost-sensitive industrial and 48V non-AEC designs requiring best-in-class light-load efficiency.
Availability
MCP16361T-E/NMXVAO is available at Aetrix Electronics and suitable for automotive 48V systems, industrial 24V DC-DC conversion, and microcontroller bias supply applications requiring stable component supply, long-term lifecycle support, and wettable-flank package compatibility with automated optical inspection.
Supply support for MCP16361T-E/NMXVAO 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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog, interface, and power management ICs, with strong focus on industrial, automotive, and aerospace reliability standards.
The MCP16361T-E/NMXVAO belongs to Microchip's high-voltage buck regulator product line, designed specifically for efficient, compact, and robust local DC-DC conversion in 12V–48V input systems where space, thermal performance, and light-load efficiency are critical.
FAQ
What is the feedback reference voltage of the MCP16361T-E/NMXVAO?
The MCP16361T-E/NMXVAO uses an internal precision 0.800 V feedback reference (VFB), with ±0.016 V tolerance over temperature. This value sets the regulation point when used with an external resistor divider on the FB pin, enabling accurate output voltage programming from 2.0 V to 24 V.
Does the MCP16361T-E/NMXVAO require an external bootstrap diode?
No, the MCP16361T-E/NMXVAO integrates an internal bootstrap diode (anode on BD pin). The BD pin must be connected to a 3–5.5 V source - typically the output voltage if within that range - eliminating the need for an external Schottky diode in most configurations.
What is the purpose of the exposed pad (EP) on the MCP16361T-E/NMXVAO?
The exposed pad (EP) on the MCP16361T-E/NMXVAO is electrically connected to GND and serves as the primary thermal conduction path. It must be soldered to the PCB ground plane using ≥4 thermal vias to maintain junction temperature within safe limits under 3 A continuous load.
How does the MCP16361T-E/NMXVAO handle light-load efficiency?
The MCP16361T-E/NMXVAO automatically transitions to Pulse Frequency Modulation (PFM) mode at light loads (<250 mA), reducing switching frequency and drawing only 18 µA quiescent current when not switching. This maintains >85% efficiency down to 1 mA, ideal for battery-powered standby operation.
Can the MCP16361T-E/NMXVAO operate with a 5.5 V output without external components on BD?
Yes - when VOUT is between 3.0 V and 5.5 V, the BD pin can be directly connected to VOUT, leveraging the internal bootstrap diode to recharge the BOOST capacitor. No external components are needed, simplifying design and reducing BOM count for common 3.3 V and 5 V outputs.
MCP16361T-E/NMXVAO Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
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- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
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MCP16361T-E/NMXVAO FAQ
1.How can I place an order for MCP16361T-E/NMXVAO through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16361T-E/NMXVAO 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 MCP16361T-E/NMXVAO reliable?
The price and inventory of MCP16361T-E/NMXVAO are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16361T-E/NMXVAO is usually 5 days.
3.What payment methods are accepted for MCP16361T-E/NMXVAO?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16361T-E/NMXVAO transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16361T-E/NMXVAO?
MCP16361T-E/NMXVAO orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16361T-E/NMXVAO 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 MCP16361T-E/NMXVAO?
For technical support, including MCP16361T-E/NMXVAO datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16361T-E/NMXVAO requirements.
6.How does Aetrix verify that MCP16361T-E/NMXVAO is sourced from the original manufacturer or authorized distributors?
All MCP16361T-E/NMXVAO 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 MCP16361T-E/NMXVAO meets industry standards.
7.What is the process for return or replacement of MCP16361T-E/NMXVAO?
All MCP16361T-E/NMXVAO units undergo pre-shipment inspection (PSI). If there is an issue with MCP16361T-E/NMXVAO, 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 MCP16361T-E/NMXVAO part is unused and in its original packaging.
Return procedure for MCP16361T-E/NMXVAO:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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