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Microchip Technology MCP16323T-250E/NG
- Part No.:
- MCP16323T-250E/NG
- Manufacturer:
- Microchip Technology
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MCP16323T-250E/NG.pdf
- Description:
- IC REG BUCK 2.5V 3A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,190
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Product details
Overview
MCP16323T-250E/NG from Microchip Technology is a synchronous step-down DC-DC converter delivering 3A continuous output at fixed 2.5V with ±2% accuracy, operating from 6.0V–18V input and featuring integrated 180 mΩ high-side and 120 mΩ low-side N-channel MOSFETs, 1 MHz fixed-frequency peak current mode control, and power-good indication - deployed in industrial 12V input power rails and PIC® microcontroller bias supplies.
For engineers reviewing the MCP16323T-250E/NG datasheet, MCP16323T-250E/NG pinout, MCP16323T-250E/NG application, or MCP16323T-250E/NG equivalent, key selection criteria include its QFN-16 (3×3 mm) thermal pad layout, 2.5V fixed-output regulation under 3A load, UVLO threshold of 5.75V, and compatibility with ceramic output capacitors without external compensation.
Technical Context
The MCP16323T-250E/NG implements a fixed-frequency (1 MHz), peak current mode controlled buck architecture with internal slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its dual integrated N-MOSFETs enable synchronous rectification, eliminating external diode losses and supporting >95% typical efficiency across 0.9V–5V outputs.
Control logic includes internal soft-start (4 ms), undervoltage lockout (5.75V start, 0.65V hysteresis), overtemperature shutdown (170°C trip, 160°C release), VOUT overvoltage protection (103% threshold), and open-drain PG reporting with 10 ms delay after VOUT exceeds 93% of nominal. The BOOST capacitor replenishment scheme enforces 240 ns off-time every 8th cycle to sustain high-side gate drive.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.0V to 18V - supports wide industrial and automotive supply rails without pre-regulation |
| Output Voltage | Fixed 2.5V ±2% - eliminates external feedback resistors and reduces BOM count |
| Continuous Output Current | 3A - sustains full load at 2.5V output with proper thermal layout on 4-layer PCB |
| Switching Frequency | 1 MHz ±10% - enables compact 4.7 µH inductor and low-profile 22 µF ceramic output capacitors |
| High-Side RDS(ON) | 180 mΩ - minimizes conduction loss during high-duty-cycle operation (e.g., 2.5V from 12V) |
| Low-Side RDS(ON) | 120 mΩ - reduces freewheeling loss and improves light-load efficiency |
| UVLO Threshold | 5.75V (typical) with 0.65V hysteresis - prevents erratic startup during brownout conditions |
| Thermal Resistance θJA | 38.5°C/W - requires exposed thermal pad (EP) soldered to PCB ground plane for 125°C junction limit |
Pinout & Package
Package: 16-pin QFN (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad (EP) - requires solder connection to PCB ground plane for thermal and electrical integrity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 12, 13, 16 SW | Switch node | Connects to inductor and BOOST capacitor; carries high di/dt switching current - must use short, wide copper trace |
| 2, 3, 11 VIN | Input power supply | Distributes 6–18V input to internal circuitry and high-side switch - requires local 2×10 µF decoupling |
| 4 SGND | Signal ground | Analog reference and control loop ground - isolated from PGND to reduce noise coupling into feedback path |
| 5 VFB | Feedback input | Internally tied to 2.5V reference for fixed-output version - no external divider needed |
| 6, 7 NC | No connection | Unbonded pins - must remain unconnected and unpopulated on PCB |
| 8 PG | Power Good open-drain | Active-low indicator pulled up externally to ≤6V; asserts after 10 ms once VOUT ≥93% of 2.5V |
| 9 EN | Enable input | Logic-high (>2.2V) enables regulator; internally pulled up to 4.2V - pull low to achieve <10 µA shutdown current |
| 10 BOOST | Bootstrap voltage supply | Drives high-side gate via external 22 nF ceramic cap between BOOST and SW - recharged each low-side conduction cycle |
| 14, 15 PGND | Power ground | Return path for low-side MOSFET and synchronous rectifier - separate from SGND to isolate switching noise |
| 17 EP | Exposed thermal pad | Electrically isolated copper pad - must be soldered to solid PCB ground plane for thermal dissipation and EMI reduction |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high- and low-side N-MOSFETs | Eliminates external power switches and reduces solution size by >30% vs. controller-based designs |
| Internal compensation | Removes need for external Type-II/III compensation network - simplifies design and validation |
| Stable with ceramic capacitors | Enables use of low-ESR, high-reliability MLCCs instead of bulkier electrolytics or tantalums |
| Cycle-by-cycle peak current limit | Provides robust short-circuit protection without foldback or latch-off behavior |
| VOUT supervisor with PG pin | Delivers system-level power sequencing capability without adding discrete supervisor IC |
| 1 MHz fixed-frequency operation | Supports consistent EMI filtering design and predictable inductor core loss modeling |
Applications
| PIC® Microcontroller Bias Supply | 12V Industrial Input DC-DC Conversion |
|---|---|
Use Scenario: Powering 3.3V/2.5V I/O and core rails of PIC32MX or dsPIC33 series microcontrollers in programmable logic controllers. IC Role / Device Role / Timing Role: Primary point-of-load regulator delivering stable 2.5V at up to 3A with fast transient response to CPU burst loads. Use Value: Internal soft-start prevents inrush current during cold boot; PG signal enables firmware-controlled reset assertion until rail stabilization. |
Use Scenario: Converting unregulated 12V bus in factory automation sensors and motor drives to clean 2.5V analog front-end supply. IC Role / Device Role / Timing Role: High-efficiency synchronous buck stage replacing linear regulators to reduce thermal load in sealed enclosures. Use Value: 95% typical efficiency at 2A load cuts heat generation by >70% vs. LDO; UVLO ensures operation only within safe input range. |
| DSL Cable Modem Power Rail | SLA Battery Powered Devices |
Use Scenario: Generating 2.5V supply for Ethernet PHY and line driver ICs in broadband access equipment operating from 12V wall adapters. IC Role / Device Role / Timing Role: Fixed-output buck regulator with tight output tolerance enabling direct interface to 2.5V LVCMOS interfaces. Use Value: ±2% output accuracy meets JEDEC JESD8-12B requirements for 2.5V I/O; PFM mode extends standby battery life. |
Use Scenario: Regulating 12V SLA battery (9–14.4V range) to 2.5V for portable medical monitors and handheld test instruments. IC Role / Device Role / Timing Role: Wide-input buck converter maintaining regulation down to 6V input - accommodates battery discharge curve. Use Value: 5 µA shutdown current preserves battery charge during sleep; overtemperature protection prevents thermal runaway in confined 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 | Higher 5A rating, 2.2 MHz switching, adjustable output only - requires external feedback resistors | Targets higher-current systems needing dynamic voltage scaling; lacks fixed 2.5V variant | Select when >3A output or faster transient response is required; verify layout supports 2.2 MHz EMI filtering |
| TPS54332DR | 3A adjustable buck with 0.8V reference, 1 MHz, but no integrated low-side FET - requires external sync rectifier | Suitable for cost-sensitive designs where MOSFET selection is optimized per application; no PG pin | Choose if external MOSFET optimization is preferred; add discrete supervisor for power sequencing |
Compared with MIC24046-YML and TPS54332DR, the MCP16323T-250E/NG provides drop-in 2.5V fixed-output functionality with integrated power-good signaling and minimal external components - reducing design cycle time for industrial and embedded applications requiring proven reliability over 10+ years.
Availability
MCP16323T-250E/NG is available at Aetrix Electronics and suitable for industrial automation, medical instrumentation, and DSL infrastructure requiring stable component supply with long-term lifecycle support.
Supply support for MCP16323T-250E/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 U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and power management ICs for industrial, automotive, and consumer markets.
The MCP16323 product line delivers highly integrated synchronous buck regulators targeting space-constrained, thermally demanding applications where minimal external components and robust protection features are essential.
FAQ
What is the output voltage tolerance of the MCP16323T-250E/NG under full 3A load?
The MCP16323T-250E/NG maintains ±2% output voltage tolerance at 2.5V across temperature (-40°C to +125°C) and line/load conditions, verified at 1A load per datasheet DS20002284B-page 3. At 3A, output deviation remains within specification when using recommended 4.7 µH inductor and 2×22 µF output capacitors with proper thermal layout.
Does the MCP16323T-250E/NG require external compensation components?
No. The MCP16323T-250E/NG integrates full Type-II compensation circuitry, eliminating external resistors and capacitors. This is confirmed in Section 4.1.2 ("INTERNAL COMPENSATION") of DS20002284B, which states all control system components - including error amplifier and slope compensation - are internal.
How does the BOOST capacitor recharge mechanism work in the MCP16323T-250E/NG?
The MCP16323T-250E/NG forces a 240 ns off-time on the high-side switch every eighth switching cycle to allow the BOOST capacitor (22 nF) to recharge through the low-side MOSFET path. This is documented in DS20002284B-page 3 Note 1 and Section 4.1.7, ensuring reliable gate drive even near 100% duty cycle.
What is the maximum input voltage the MCP16323T-250E/NG can withstand continuously?
The absolute maximum VIN rating is 20V per DS20002284B-page 3, but continuous operation is limited to 18V as specified in the Electrical Characteristics table and device description. Operation above 18V risks exceeding safe operating area limits and triggering overvoltage protection.
Is the MCP16323T-250E/NG pin-compatible with other variants in the MCP1632x family?
Yes - all MCP1632x devices share identical QFN-16 (3×3 mm) package and pinout per DS20002284B-page 13 Table 3-1. The MCP16323T-250E/NG differs only in factory-trimmed 2.5V feedback reference; other variants (e.g., -330E/NG) retain identical pin functions and layout.
MCP16323T-250E/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):
- 2.5V
- 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-250E/NG FAQ
1.How can I place an order for MCP16323T-250E/NG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16323T-250E/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-250E/NG reliable?
The price and inventory of MCP16323T-250E/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-250E/NG is usually 5 days.
3.What payment methods are accepted for MCP16323T-250E/NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16323T-250E/NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16323T-250E/NG?
MCP16323T-250E/NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16323T-250E/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-250E/NG?
For technical support, including MCP16323T-250E/NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16323T-250E/NG requirements.
6.How does Aetrix verify that MCP16323T-250E/NG is sourced from the original manufacturer or authorized distributors?
All MCP16323T-250E/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-250E/NG meets industry standards.
7.What is the process for return or replacement of MCP16323T-250E/NG?
All MCP16323T-250E/NG units undergo pre-shipment inspection (PSI). If there is an issue with MCP16323T-250E/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-250E/NG part is unused and in its original packaging.
Return procedure for MCP16323T-250E/NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MCP16323T-250E/NG Tags
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MC34063EBD-TR
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