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Microchip Technology MCP16323T-330E/NG
- Part No.:
- MCP16323T-330E/NG
- Manufacturer:
- Microchip Technology
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MCP16323T-330E/NG.pdf
- Description:
- IC REG BUCK 3.3V 3A 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP16323T-330E/NG from Microchip Technology is a synchronous step-down DC-DC converter IC delivering 3A continuous output at fixed 3.3V (±2%) from 6.0–18V input, featuring integrated 180 mΩ high-side and 120 mΩ low-side N-Channel MOSFETs, 1 MHz fixed-frequency peak current mode control, internal compensation, and power-good (PG) indication - deployed in industrial 12V-input power rails and PIC® microcontroller bias supplies.
For engineers reviewing the MCP16323T-330E/NG datasheet, MCP16323T-330E/NG pinout, MCP16323T-330E/NG application, or MCP16323T-330E/NG equivalent, this page delivers verified electrical parameters, QFN-16 package layout, real-world thermal and transient performance data, and validated alternative parts for 3.3V/3A buck conversion in space-constrained 12V systems.
Technical Context
The MCP16323T-330E/NG implements peak current mode control with internal slope compensation and a 1 MHz oscillator, enabling tight regulation under line and load transients while supporting ceramic output capacitors. Its architecture integrates both high-side and low-side N-MOSFETs with matched on-resistance (180 mΩ / 120 mΩ) and cycle-by-cycle current limiting to sustain 3A output without external sense resistors.
It features undervoltage lockout (5.75V start, 0.65V hysteresis), overtemperature shutdown (170°C trip, 10°C hysteresis), VOUT overvoltage protection (103% threshold), and a dedicated open-drain PG pin with 10 ms release timer - all operating across –40°C to +125°C junction temperature range in a thermally enhanced 3×3 mm QFN-16 with exposed pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 3.3V ±2% - eliminates external feedback divider, reduces BOM count and layout sensitivity. |
| Max Output Current | 3A continuous - supports high-current digital loads like microcontrollers and FPGAs without derating at 25°C. |
| Input Voltage Range | 6.0V to 18V - compatible with 12V industrial rails, SLA batteries, and wall-cube inputs with margin. |
| Switching Frequency | 1 MHz ±10% - enables compact 4.7 µH inductors and low-ESR ceramic output capacitors (2×22 µF). |
| High-Side RDS(ON) | 180 mΩ typical - minimizes conduction loss at full load; contributes to >95% peak efficiency at 3.3V/2A. |
| Low-Side RDS(ON) | 120 mΩ typical - complements high-side switch for synchronous rectification, eliminating external diode. |
| Quiescent Current (Shutdown) | 5–10 µA - enables ultra-low-power standby in battery-backed or energy-conscious systems. |
| Thermal Resistance θJA | 38.5°C/W - requires minimum 13.5 in² internal ground plane for full 3A operation at 125°C ambient. |
Pinout & Package
Package: 3×3 mm QFN-16 with exposed thermal pad (EP), RoHS-compliant, moisture-sensitive level 3.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12, 13, 16 SW | Switch node | Drain of low-side NMOS / source of high-side NMOS; connects directly to inductor and BOOST capacitor - must use short, wide PCB trace. |
| 2, 3, 11 VIN | Input supply | Primary power input for high-side switch and internal bias; requires local 2×10 µF decoupling to SGND/PGND. |
| 4 SGND | Signal ground | Analog reference and control-loop ground - isolated from switching noise; must be routed separately from PGND. |
| 5 VFB | Feedback input | Internally tied to 3.3V reference for fixed-output version; not externally connected in MCP16323T-330E/NG. |
| 6, 7 NC | No connection | Unbonded pins - must remain unconnected and unpopulated on PCB. |
| 8 PG | Power Good | Open-drain active-low output; asserts high after 10 ms delay when VOUT exceeds 93% of 3.3V (3.08 V). |
| 9 EN | Enable input | Logic-high (>2.2V) enables regulator; internally pulled up to 4.2V - pull low to disable and reduce IQ to 5 µA. |
| 10 BOOST | Bootstrap voltage | Drives high-side gate; requires 22 nF ceramic cap between BOOST and SW - auto-recharged every 8 cycles. |
| 14, 15 PGND | Power ground | Return path for low-side NMOS; separate from SGND to prevent switching noise coupling into control loop. |
| 17 EP | Exposed thermal pad | Electrically isolated copper pad - must be soldered to solid GND plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual N-MOSFETs | 180 mΩ high-side + 120 mΩ low-side switches eliminate external FETs and gate drivers, reducing solution size by >30% vs discrete designs. |
| Internal compensation | Full error amplifier + slope compensation integrated - no external compensation network required for stable 3.3V/3A operation. |
| Power Good (PG) monitoring | Open-drain PG pin reports regulated output status with 10 ms release timer and 93% UV threshold - enables safe system sequencing. |
| Ceramic-capacitor stability | Stable with low-ESR ceramic output caps (2×22 µF) - avoids bulk electrolytics, improves lifetime and temperature performance. |
| Peak current mode control | Enables fast transient response (<50 µs recovery from 1A→3A step) and inherent cycle-by-cycle current limiting without sensing resistor. |
| Soft-start | Internal 4 ms soft-start prevents inrush current and output overshoot during enable - critical for powering sensitive logic rails. |
Applications
| PIC®/dsPIC® Microcontroller Bias Supply | 12V Industrial Input DC-DC Conversion |
|---|---|
Use Scenario: Powering 3.3V I/O and core rails of PIC32MX or dsPIC33EP microcontrollers in factory automation controllers. IC Role / Device Role / Timing Role: Primary 3.3V point-of-load regulator delivering up to 3A with tight voltage accuracy (±2%) and fast load transient response. Use Value: Eliminates need for external feedback resistors and compensation components, reducing bill-of-materials and improving long-term voltage stability over temperature. |
Use Scenario: Converting unregulated 12V bus in programmable logic controllers (PLCs) to clean 3.3V for FPGA configuration and communication interfaces. IC Role / Device Role / Timing Role: High-efficiency synchronous buck converter with integrated MOSFETs and PG signaling for system-level power sequencing. Use Value: Achieves >92% efficiency at 3.3V/3A from 12V input, minimizing thermal stress in enclosed enclosures without heatsinks. |
| DSL Cable Modem Power Rail | SLA Battery Powered Devices |
Use Scenario: Generating stable 3.3V supply for Ethernet PHYs and DOCSIS chipsets in broadband access equipment operating from 12V wall adapters. IC Role / Device Role / Timing Role: Fixed-output buck regulator with UVLO (5.75V) and overvoltage protection (103%) to withstand adapter brownouts and surges. Use Value: Maintains regulation down to 6V input, enabling graceful shutdown during AC adapter dropout - critical for data integrity in modems. |
Use Scenario: Regulating power from 12V sealed lead-acid (SLA) batteries in portable medical monitors or test equipment. IC Role / Device Role / Timing Role: Low-quiescent-current (5 µA shutdown) buck converter with thermal shutdown (170°C) for battery longevity and safety. Use Value: Extends runtime in standby mode and prevents thermal runaway during extended operation in sealed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC24046-YML | Pin-compatible 3A buck with 4.5–28V input, adjustable 0.6–5.5V output, 1.2 MHz switching, and lower 100 mΩ/60 mΩ RDS(ON). | Requires external feedback resistors; lacks fixed 3.3V option - needs redesign of feedback network and compensation. | Select MIC24046-YML only if adjustable output or wider input range (up to 28V) is required; verify thermal performance at 3A with new layout. |
| TPS54332DR | 3A buck with 3.5–28V input, adjustable 0.8–25V output, 1 MHz switching, but uses external high-side MOSFET and requires compensation. | Higher BOM count and design complexity; no integrated low-side switch or internal compensation - longer qualification time. | Choose TPS54332DR only when higher input voltage (>18V) or custom output voltage beyond 3.3V is needed; not drop-in for MCP16323T-330E/NG. |
Compared with MIC24046-YML and TPS54332DR, the MCP16323T-330E/NG offers the lowest design effort for fixed 3.3V/3A applications due to its zero-resistor feedback, internal compensation, and QFN-16 footprint - reducing layout risk and validation time without sacrificing efficiency or thermal robustness.
Availability
MCP16323T-330E/NG is available at Aetrix Electronics and suitable for industrial PLCs, DSL modems, battery-powered medical devices, and PIC® microcontroller bias supplies requiring stable component supply and long-lifecycle support.
Supply support for MCP16323T-330E/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 Inc. is a U.S.-based semiconductor company specializing in microcontrollers, analog devices, and power management ICs, with a focus on industrial, automotive, and IoT applications.
The MCP16323 product line delivers highly integrated synchronous buck regulators targeting space-constrained, high-efficiency 6–18V-to-3.3V/5V point-of-load conversion in cost-sensitive industrial and consumer systems.
FAQ
What is the maximum input voltage the MCP16323T-330E/NG can handle?
The MCP16323T-330E/NG supports an absolute maximum input voltage of 20V, with recommended continuous operation from 6.0V to 18V. Its undervoltage lockout activates at 5.75V (typical), and the device shuts down if junction temperature exceeds 170°C. Operation above 18V risks violating the 20V absolute max rating and may cause permanent damage.
Does the MCP16323T-330E/NG require external compensation components?
No, the MCP16323T-330E/NG includes fully integrated compensation circuitry - including error amplifier and slope compensation - eliminating the need for external RC networks. This simplifies design for the fixed 3.3V output version and ensures stability with standard 4.7 µH inductors and 2×22 µF ceramic output capacitors.
How does the Power Good (PG) pin function on the MCP16323T-330E/NG?
The PG pin on the MCP16323T-330E/NG is an open-drain output that remains low until VOUT rises above 93% of 3.3V (3.08 V), then waits 10 ms before releasing high. It must be pulled up externally to ≤6V and signals system controllers that the 3.3V rail is within specification and stable - essential for safe FPGA or microcontroller startup sequencing.
Can the MCP16323T-330E/NG operate from a 6V input at full 3A load?
Yes, the MCP16323T-330E/NG delivers 3A continuously at 3.3V output from a 6V input, though efficiency drops to ~85% (vs. >92% at 12V). The minimum input voltage is constrained by duty cycle limits: at 3.3V output, 6V input yields ~55% duty cycle - well above the 7% minimum, ensuring stable continuous conduction mode operation.
Is the MCP16323T-330E/NG still in active production?
The MCP16323T-330E/NG is marked as obsolete by Microchip for new designs, with MIC24046 recommended as a functional successor. However, Aetrix Electronics maintains active inventory and supply chain support for legacy designs, including full traceability, extended lifecycle coordination, and obsolescence mitigation planning for ongoing production.
MCP16323T-330E/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):
- 18V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- -
- Current - Output:
- 3A
- 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)
MCP16323T-330E/NG FAQ
1.How can I place an order for MCP16323T-330E/NG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16323T-330E/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 MCP16323T-330E/NG reliable?
The price and inventory of MCP16323T-330E/NG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MCP16323T-330E/NG is usually 5 days.
3.What payment methods are accepted for MCP16323T-330E/NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16323T-330E/NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16323T-330E/NG?
MCP16323T-330E/NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16323T-330E/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 MCP16323T-330E/NG?
For technical support, including MCP16323T-330E/NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16323T-330E/NG requirements.
6.How does Aetrix verify that MCP16323T-330E/NG is sourced from the original manufacturer or authorized distributors?
All MCP16323T-330E/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 MCP16323T-330E/NG meets industry standards.
7.What is the process for return or replacement of MCP16323T-330E/NG?
All MCP16323T-330E/NG units undergo pre-shipment inspection (PSI). If there is an issue with MCP16323T-330E/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 MCP16323T-330E/NG part is unused and in its original packaging.
Return procedure for MCP16323T-330E/NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP16323T-330E/NG Tags
-
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TPS561201DDCR
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MC33063ADR
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AP3012KTR-G1
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TLV61048DBVR
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AZ34063UMTR-G1
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AP62300TWU-7
Diodes Incorporated
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MC34063EBD-TR
STMicroelectronics
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