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Microchip Technology MCP16323T-500E/NG
- Part No.:
- MCP16323T-500E/NG
- Manufacturer:
- Microchip Technology
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MCP16323T-500E/NG.pdf
- Description:
- IC REG BUCK 5V 3A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,337
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Product details
Overview
MCP16323T-500E/NG from Microchip Technology is a synchronous step-down DC-DC converter IC delivering up to 3A 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–18V input and supports industrial power metering and DSL modem bias supply applications.
For engineers reviewing the MCP16323T-500E/NG datasheet, MCP16323T-500E/NG pinout, MCP16323T-500E/NG application, or MCP16323T-500E/NG equivalent, key selection criteria include its QFN-16 (3×3 mm) thermal pad package, peak current mode control architecture, internal soft-start, power-good (PG) indication, and UVLO threshold of 5.75V.
Technical Context
The MCP16323T-500E/NG implements fixed-frequency (1 MHz) peak current mode control with internal slope compensation and integrated error amplifier, enabling fast transient response and stable regulation across input steps and load changes. Its architecture includes internal high-side and low-side gate drivers optimized for bootstrap operation using an external BOOST capacitor.
It features cycle-by-cycle current limiting, overtemperature shutdown at 170°C, VOUT overvoltage protection at 103% of nominal, and undervoltage lockout with 0.65V hysteresis. The PG pin provides open-drain power-good signaling with 10 ms release delay after VOUT exceeds 93% of target.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.0V ±2% - tightly regulated without external feedback resistors; suitable for 5V logic rails and USB-powered peripherals. |
| Max Output Current | 3A continuous - supports high-current digital loads such as microcontroller cores and FPGA I/O banks. |
| Input Voltage Range | 6.0V to 18V - compatible with 12V industrial bus, SLA battery systems, and wall-cube inputs. |
| Switching Frequency | 1.0 MHz ±10% - enables compact 4.7 µH inductors and ceramic output capacitors for space-constrained designs. |
| High-Side RDS(ON) | 180 mΩ - minimizes conduction loss at high duty cycles; critical for efficiency above 3.3V output. |
| Low-Side RDS(ON) | 120 mΩ - reduces freewheeling losses and improves light-load efficiency in synchronous buck topology. |
| UVLO Threshold | 5.75V (typical) with 0.65V hysteresis - prevents erratic startup during brown-out conditions on 6–12V supplies. |
| Thermal Shutdown | 170°C junction temperature - protects against 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), RoHS-compliant, moisture-sensitive level 3.
| 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; requires short, wide PCB 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; must be isolated from noisy PGND to avoid regulation instability. |
| 5 VFB | Feedback input | Internally tied to 5.0V reference for fixed-output version; not used externally in MCP16323T-500E/NG. |
| 6, 7 NC | No connection | Unbonded pins; must remain unconnected and unpopulated on PCB. |
| 8 PG | Power-good output | Open-drain active-low signal; pulled up externally to ≤6V; asserts after 10 ms once VOUT ≥93% of 5.0V. |
| 9 EN | Enable input | Logic-high (>2.2V) enables regulator; internally pulled up to 4.2V; <0.8V disables with 5 µA shutdown current. |
| 10 BOOST | Bootstrap voltage supply | Drives high-side gate; requires 22 nF ceramic capacitor between BOOST and SW for proper NMOS turn-on. |
| 14, 15 PGND | Power ground | Return path for low-side switch; must be connected to SGND only at single point near EP for noise isolation. |
| 17 EP | Exposed thermal pad | Electrically isolated copper pad; must be soldered to solid GND plane for thermal dissipation and EMI reduction. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated synchronous switches | 180 mΩ high-side + 120 mΩ low-side N-MOSFETs eliminate external FETs and reduce BOM count by 4 components. |
| Internal compensation | Full Type II error amplifier and slope compensation integrated - no external RC network required for stability. |
| Stable with ceramic capacitors | Supports low-ESR MLCCs on input/output - eliminates bulk electrolytics and improves reliability in wide-temp environments. |
| Internal soft-start | 4 ms controlled VOUT ramp-up - prevents inrush current and overshoot during power-on sequencing. |
| VOUT supervisor via PG pin | Monitors output under-voltage (93% threshold) and releases PG after 10 ms - enables system-level power sequencing. |
| Peak current limit | 3.4–4.4 A cycle-by-cycle limit - protects against short-circuit and overload without external sensing resistors. |
Applications
| DSL Cable Modem Power Supply | PIC®/dsPIC® Microcontroller Bias Rail |
|---|---|
|
Use Scenario: Provides clean, regulated 5V rail for cable modem PHY, MAC, and memory subsystems operating from 12V wall adapter. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering 3A at 5V with tight line/load regulation and fast transient response. Use Value: Replaces discrete controller+FET solutions; achieves >92% efficiency at 2A load, reducing thermal footprint in sealed enclosures. |
Use Scenario: Powers core logic and I/O of PIC32MX or dsPIC33EP microcontrollers in industrial control panels. IC Role / Device Role / Timing Role: Fixed-output 5V DC-DC converter with EN-controlled sequencing and PG status reporting for safe MCU boot. Use Value: Internal soft-start and PG delay ensure deterministic reset timing; QFN-16 package fits dense MCU carrier boards. |
| Industrial Power Metering | SLA Battery-Powered Devices |
|
Use Scenario: Supplies 5V to metrology ADC, isolation interface, and display driver in DIN-rail mounted electricity meters. IC Role / Device Role / Timing Role: High-input-voltage buck regulator handling 12–18V DC from auxiliary power rails with UVLO protection. Use Value: 5.75V UVLO start prevents false activation during battery sag; thermal shutdown ensures safety during extended overloads. |
Use Scenario: Converts 12V SLA battery output to stable 5V for portable medical monitors and handheld test equipment. IC Role / Device Role / Timing Role: Efficient synchronous buck with 5 µA shutdown current to extend standby time between charges. Use Value: Achieves >88% efficiency at 100 mA load; low quiescent current extends battery life beyond 12 months in sleep mode. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MIC24046-5.0YML | Pin-compatible 5V fixed-output buck; 3A rating; 2.7–18V input; lower 120 mΩ high-side RDS(ON); no PG pin. | Lacks power-good reporting; requires external enable sequencing for systems needing PG-driven reset assertion. | Choose when PG functionality is unnecessary and higher efficiency at light loads is prioritized. |
| TPS54332DR | Adjustable 5V output via resistor divider; 3A; 3.5–28V input; external compensation; no integrated low-side FET. | Requires external low-side MOSFET and compensation network; larger solution size and higher design complexity. | Choose when input voltage may exceed 18V or when adjustable output is needed for future variants. |
Compared with MIC24046-5.0YML and TPS54332DR, the MCP16323T-500E/NG uniquely integrates PG reporting, internal low-side FET, and fixed 5V output in a 3×3 mm QFN-reducing layout area and eliminating feedback resistor selection while maintaining robust thermal protection.
Availability
MCP16323T-500E/NG is available at Aetrix Electronics and suitable for DSL modems, industrial power meters, PIC®/dsPIC® microcontroller bias supplies, and SLA battery-powered devices requiring stable component supply and long-term lifecycle support.
Supply support for MCP16323T-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 Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog, and power management ICs, with broad industrial and automotive qualification coverage.
The MCP16323 product line delivers highly integrated synchronous buck regulators targeting space-constrained, high-efficiency DC-DC conversion in industrial, telecom, and consumer power systems where minimal external components and thermal robustness are critical.
FAQ
What is the output voltage tolerance of the MCP16323T-500E/NG?
The MCP16323T-500E/NG provides a fixed 5.0V output with ±2% tolerance over full load, line, and temperature range (–40°C to +125°C). This specification applies in PWM mode at IOUT = 1A and ensures reliable operation for 5V logic interfaces without external trimming.
Does the MCP16323T-500E/NG require external feedback resistors?
No - the MCP16323T-500E/NG is the fixed 5.0V output variant; its VFB pin is internally connected to the 5.0V reference. External resistors are unnecessary, simplifying layout and eliminating resistor tolerance errors that affect adjustable versions.
How does the PG (Power Good) pin function on the MCP16323T-500E/NG?
The PG pin on the MCP16323T-500E/NG is an open-drain output that remains low until VOUT reaches 93% of 5.0V (4.65V), then waits 10 ms before releasing high. It must be pulled up externally to ≤6V and signals system controllers that the 5V rail is stable and ready.
What thermal management considerations apply to the MCP16323T-500E/NG?
The MCP16323T-500E/NG uses a 3×3 mm QFN with exposed thermal pad (EP) requiring direct solder connection to a PCB GND plane. Its θJA is 38.5°C/W on a 4-layer board; thermal shutdown activates at 170°C junction temperature with 10°C hysteresis.
Can the MCP16323T-500E/NG operate from a 6V input source?
Yes - the MCP16323T-500E/NG supports input voltages from 6.0V to 18V. Its UVLO starts at 5.75V (typical), ensuring reliable startup from nominal 6V sources. At minimum input, maximum duty cycle limits output current to maintain regulation, especially near 5V output.
MCP16323T-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):
- 18V
- Voltage - Output (Min/Fixed):
- 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-500E/NG FAQ
1.How can I place an order for MCP16323T-500E/NG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16323T-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 MCP16323T-500E/NG reliable?
The price and inventory of MCP16323T-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 MCP16323T-500E/NG is usually 5 days.
3.What payment methods are accepted for MCP16323T-500E/NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16323T-500E/NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16323T-500E/NG?
MCP16323T-500E/NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16323T-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 MCP16323T-500E/NG?
For technical support, including MCP16323T-500E/NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16323T-500E/NG requirements.
6.How does Aetrix verify that MCP16323T-500E/NG is sourced from the original manufacturer or authorized distributors?
All MCP16323T-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 MCP16323T-500E/NG meets industry standards.
7.What is the process for return or replacement of MCP16323T-500E/NG?
All MCP16323T-500E/NG units undergo pre-shipment inspection (PSI). If there is an issue with MCP16323T-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 MCP16323T-500E/NG part is unused and in its original packaging.
Return procedure for MCP16323T-500E/NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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