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Microchip Technology MCP16322T-500E/NG
- Part No.:
- MCP16322T-500E/NG
- Manufacturer:
- Microchip Technology
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MCP16322T-500E/NG.pdf
- Description:
- IC REG BUCK 5V 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:4,369
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Product details
Overview
MCP16322T-500E/NG from Microchip Technology is a synchronous step-down DC-DC converter delivering up to 2A continuous output current with fixed 5.0V output, ±2% accuracy, 1 MHz switching frequency, and integrated 180 mΩ high-side and 120 mΩ low-side N-channel MOSFETs. It operates from 6.0V–24V input and supports industrial power rails, PIC®/dsPIC® microcontroller biasing, and wall-cube regulation.
For engineers reviewing the MCP16322T-500E/NG datasheet, MCP16322T-500E/NG pinout, MCP16322T-500E/NG application, or MCP16322T-500E/NG equivalent, key selection criteria include its 5V fixed output, QFN-16 (3×3 mm) thermal pad package, peak-current-mode control architecture, power-good (PG) open-drain indicator, and UVLO threshold of 5.75V.
Technical Context
The MCP16322T-500E/NG implements fixed-frequency (1 MHz) peak-current-mode control with internal slope compensation to ensure stability across wide VIN/VOUT ratios and load transients. Its dual integrated N-MOSFETs-180 mΩ high-side and 120 mΩ low-side-enable high efficiency (>95% typical) without external gate drivers or bootstrap diodes.
It features internal soft-start (4 ms), cycle-by-cycle current limiting (2.4–3.4 A for MCP16322), overtemperature shutdown at 170°C, VOUT overvoltage protection at 103% VOUT, and a dedicated PG pin with 10 ms release timer and 93% VOUT undervoltage threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% - eliminates need for external feedback resistors and ensures stable logic-level rail for MCU peripherals. |
| Max Output Current | 2A continuous - supports higher-power digital loads such as FPGA I/O banks or multi-core microcontrollers. |
| Input Voltage Range | 6.0V to 24V - compatible with 12V industrial buses, automotive battery systems (with transient tolerance), and AC-DC adapter outputs. |
| Switching Frequency | 1 MHz ±10% - enables compact 4.7 µH inductors and ceramic output capacitors, reducing solution footprint. |
| High-Side RDS(ON) | 180 mΩ - minimizes conduction loss at high duty cycles, critical for 5V-out/12V-in conversion (42% duty). |
| Low-Side RDS(ON) | 120 mΩ - reduces freewheeling loss and improves light-load efficiency in synchronous operation. |
| UVLO Threshold | 5.75V (typ), 5.5–6.0V range - prevents erratic startup during brownout conditions on 6V nominal supplies. |
| Thermal Shutdown | 170°C with 10°C hysteresis - protects silicon under sustained overload or poor PCB thermal design. |
Pinout & Package
Package: 16-pin QFN (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad (EP) requiring PCB GND connection for thermal performance and EMI reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,12,13,16) | Switch node | Connects directly to inductor and BOOST capacitor; carries high di/dt switching current - requires short, wide copper trace. |
| VIN (Pins 2,3,11) | Power input | Distributes 6–24V supply to internal bias circuitry and high-side switch; requires local 2×10 µF decoupling. |
| SGND (Pin 4) | Signal ground | Reference for error amplifier, VFB comparator, and control logic - must be isolated from noisy PGND paths. |
| VFB (Pin 5) | Feedback input | Internally tied to 5.0V reference for fixed-output version; no external resistor divider needed. |
| NC (Pins 6,7) | No connection | Unbonded die pads - must remain unconnected on PCB; no pull-up/down or routing. |
| PG (Pin 8) | Power good output | Open-drain active-low signal indicating VOUT ≥ 93% of 5.0V after 10 ms delay - used for system sequencing. |
| EN (Pin 9) | Enable input | Logic-high (>2.2V) enables regulator; internally pulled up to 4.2V - allows single-resistor disable control. |
| BOOST (Pin 10) | Bootstrap drive | Supplies gate voltage for high-side N-MOSFET via external 22 nF capacitor between BOOST and SW. |
| PGND (Pins 14,15) | Power ground | Return path for low-side switch and inductor current - must connect to SGND only at EP or single-point star ground. |
| EP (Pin 17) | Exposed thermal pad | Electrically isolated copper pad - must be soldered to large PCB GND plane for thermal dissipation and EMI shielding. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous switches | Eliminates external MOSFETs and gate drivers, reducing BOM count and layout complexity for 2A buck designs. |
| Internal compensation | Enables stable operation with standard 4.7 µH inductor and ceramic output caps - no external compensation network required. |
| Power Good (PG) indicator | Provides system-level power sequencing capability without external supervisor ICs or RC timing circuits. |
| 1 MHz fixed-frequency PWM | Supports small magnetics and low-profile layouts while maintaining predictable EMI spectrum for EMC compliance. |
| Soft-start (4 ms) | Prevents inrush current into downstream capacitance and avoids output overshoot during cold start or hot-plug events. |
| Overvoltage & overtemperature protection | Hardware-level fault response (tri-state SW, thermal shutdown) ensures robustness in unattended or safety-critical applications. |
Applications
| PIC®/dsPIC® Microcontroller Bias Supply | 12V Industrial Input DC-DC Conversion |
|---|---|
Use Scenario: Powering core and I/O rails of PIC32MZ or dsPIC33CH microcontrollers in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Primary 5V bias regulator supplying CPU, USB PHY, and analog peripherals with tight voltage tolerance. Use Value: Fixed 5.0V output meets USB 2.0 host requirements; 2A capacity supports simultaneous Ethernet MAC + CAN FD + SPI flash operations. | Use Scenario: Converting 12V factory bus to regulated 5V for sensor interface modules and HMI backlights. IC Role / Device Role / Timing Role: Main point-of-load (POL) regulator delivering clean, sequenced 5V to mixed-signal subsystems. Use Value: UVLO at 5.75V prevents malfunction during 12V line sag; PG signal enables watchdog reset coordination across distributed nodes. |
| Wall Cube Regulation | SLA Battery Powered Devices |
Use Scenario: Regulating unregulated 9–18V output from universal AC-DC adapters into stable 5V for consumer electronics. IC Role / Device Role / Timing Role: Secondary-stage buck converter replacing linear regulators to improve efficiency and reduce thermal load. Use Value: 95% typical efficiency at 1A reduces heat buildup inside sealed enclosures; 1 MHz switching avoids audible noise in audio equipment. | Use Scenario: Powering portable test instruments powered by 12V sealed lead-acid (SLA) batteries with wide discharge curve (14.4V → 10.5V). IC Role / Device Role / Timing Role: Primary DC-DC stage maintaining constant 5V output despite battery voltage decay. Use Value: Operates down to 6V input ensures full functionality until battery reaches end-of-discharge; shutdown current <10 µA preserves standby runtime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MCP16312T-500E/NG | Same 5V fixed output, but lower 1.5A rating and 0.8V reference-based architecture; lacks PG pin. | Suitable for cost-sensitive, lower-current applications where power sequencing is not required. | Select when 1.5A suffices and PG signaling is unnecessary - offers identical pinout and footprint. |
| MP2451DT-LF-Z | 5V fixed output, 2A rating, 2 MHz switching, no PG pin, 4.5–36V input range, smaller 8-pin SOIC package. | Better suited for space-constrained designs with wider input range; lacks thermal pad and PG reporting. | Choose for higher-frequency, smaller-inductor designs where 36V max input and absence of PG are acceptable trade-offs. |
Compared with MCP16312T-500E/NG and MP2451DT-LF-Z, the MCP16322T-500E/NG uniquely combines 2A capability, PG indication, and QFN thermal performance - making it optimal for industrial systems requiring reliability, sequencing, and thermal headroom.
Availability
MCP16322T-500E/NG is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and embedded computing applications requiring stable component supply and long-term manufacturability.
Supply support for MCP16322T-500E/NG 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 microcontrollers, analog, and power management ICs, with deep expertise in embedded control and energy-efficient power conversion.
The MCP16321/2 product line delivers highly integrated synchronous buck regulators targeting cost-sensitive, space-constrained industrial and consumer power supplies needing fixed or adjustable outputs from 6V–24V inputs.
FAQ
What is the maximum input voltage supported by the MCP16322T-500E/NG?
The MCP16322T-500E/NG supports an absolute maximum input voltage of 26.4V, with recommended continuous operation from 6.0V to 24V. Operation above 24V risks exceeding internal device stress limits and may trigger overvoltage protection or permanent damage. The UVLO threshold starts at 5.75V (typical), ensuring reliable startup across the full 6–24V range.
Does the MCP16322T-500E/NG require external compensation components?
No, the MCP16322T-500E/NG includes fully internal compensation - no external capacitors or resistors are needed for loop stability. This is confirmed in the datasheet's "Internal Compensation" section and validated across the full operating range (–40°C to +125°C junction temperature) using standard 4.7 µH inductors and ceramic output capacitors.
How does the Power Good (PG) pin function on the MCP16322T-500E/NG?
The PG pin on the MCP16322T-500E/NG is an open-drain, active-low output that goes high (via external pull-up) only after VOUT reaches ≥93% of 5.0V and remains stable for 10 ms. It reports undervoltage faults and provides precise sequencing control - critical for coordinating startup with FPGAs, microprocessors, or supervisory ICs in complex systems.
Can the MCP16322T-500E/NG operate with ceramic output capacitors?
Yes, the MCP16322T-500E/NG is explicitly designed to be stable with ceramic output capacitors - a key feature highlighted in the datasheet's "Features" list and verified in all typical application circuits. It requires two 22 µF X5R/X7R ceramics (or equivalent ESR ≤10 mΩ) and benefits from their low ESR to achieve >95% efficiency and minimal output ripple.
Is the MCP16322T-500E/NG pin-compatible with other devices in the MCP16321/2 family?
Yes, all MCP16321/2 variants - including MCP16322T-500E/NG - share identical QFN-16 (3×3 mm) pinout and footprint. The only functional differences are output current rating (1A vs. 2A), internal feedback reference (fixed vs. adjustable), and minor parameter tolerances - enabling drop-in replacement within the same output voltage variant group.
MCP16322T-500E/NG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6V
- Voltage - Input (Max):
- 24V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 2A
- Frequency - Switching:
- 1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QFN (3x3)
MCP16322T-500E/NG FAQ
1.How can I place an order for MCP16322T-500E/NG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16322T-500E/NG 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 MCP16322T-500E/NG reliable?
The price and inventory of MCP16322T-500E/NG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16322T-500E/NG is usually 5 days.
3.What payment methods are accepted for MCP16322T-500E/NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16322T-500E/NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16322T-500E/NG?
MCP16322T-500E/NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16322T-500E/NG 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 MCP16322T-500E/NG?
For technical support, including MCP16322T-500E/NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16322T-500E/NG requirements.
6.How does Aetrix verify that MCP16322T-500E/NG is sourced from the original manufacturer or authorized distributors?
All MCP16322T-500E/NG 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 MCP16322T-500E/NG meets industry standards.
7.What is the process for return or replacement of MCP16322T-500E/NG?
All MCP16322T-500E/NG units undergo pre-shipment inspection (PSI). If there is an issue with MCP16322T-500E/NG, 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 MCP16322T-500E/NG part is unused and in its original packaging.
Return procedure for MCP16322T-500E/NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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