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Microchip Technology MCP16323T-ADJE/NG
- Part No.:
- MCP16323T-ADJE/NG
- Manufacturer:
- Microchip Technology
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MCP16323T-ADJE/NG.pdf
- Description:
- IC REG BUCK ADJ 3A 16QFN
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
MCP16323T-ADJE/NG from Microchip Technology is a synchronous step-down DC-DC converter IC with integrated high-side (180 mΩ) and low-side (120 mΩ) N-channel MOSFETs, 1 MHz fixed-frequency peak current mode control, 0.9V–5.0V adjustable output voltage (±1.5% reference accuracy), and 3A continuous output current capability. It operates from 6.0V to 18V input and delivers stable bias for PIC®/dsPIC® microcontrollers in industrial 12V-input systems.
For engineers reviewing the MCP16323T-ADJE/NG datasheet, MCP16323T-ADJE/NG pinout, MCP16323T-ADJE/NG application, or MCP16323T-ADJE/NG equivalent, this page provides verified technical context, validated package mapping, confirmed pin functions, real-world application constraints (e.g., 7% minimum duty cycle, BOOST capacitor replenishment timing), and two rigorously cross-checked alternative regulators for 6–18V input, 3A buck applications.
Technical Context
The MCP16323T-ADJE/NG implements a fixed-frequency (0.9–1.1 MHz) peak current mode architecture with internal slope compensation and an integrated 0.9V reference for adjustable output configuration. Its control loop uses internal compensation and supports ceramic output capacitors without external loop components.
It integrates dual N-channel switches - high-side RDS(ON) = 180 mΩ and low-side RDS(ON) = 120 mΩ - with cycle-by-cycle current limiting (3.4–4.4 A trip), undervoltage lockout (5.5–6.0 V start, 0.65 V hysteresis), overtemperature shutdown (170°C, 10°C hysteresis), and VOUT overvoltage protection (103% threshold).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 6.0V to 18V - supports 12V industrial rails and SLA battery inputs without pre-regulation |
| Output Current | 3A continuous - sustains full load at 0.9V–5.0V with thermal derating per θJA = 38.5°C/W |
| Switching Frequency | 1 MHz ±10% - enables compact 4.7 µH inductors and low-ESR ceramic output caps |
| Feedback Reference | 0.9V ±1.5% - sets output via external resistor divider; enables precise 0.9V–5.0V adjustment |
| High-Side RDS(ON) | 180 mΩ typical - limits conduction loss at 3A to ~1.6W max under worst-case conditions |
| Low-Side RDS(ON) | 120 mΩ typical - reduces freewheeling loss and improves light-load efficiency |
| UVLO Threshold | 5.75V typical start with 0.65V hysteresis - prevents erratic startup during brownout on 6V–12V supplies |
| Soft-Start Time | 4 ms typical - controls VOUT ramp rate to limit inrush current into downstream capacitance |
Pinout & Package
Package: QFN-16 (3×3 mm, exposed thermal pad EP). Thermal pad must be soldered to PCB ground plane for thermal performance and electrical stability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| SW (Pins 1,12,13,16) | Switch node | Common drain-source connection of internal FETs; connects directly to inductor and BOOST capacitor - requires short, wide trace |
| VIN (Pins 2,3,11) | Power input | Distributes 6–18V supply to internal bias circuitry and high-side driver; decoupled with 2×10 µF ceramics |
| SGND (Pin 4) | Signal ground | Analog reference and control loop return - must be isolated from PGND to avoid noise coupling |
| VFB (Pin 5) | Feedback input | Senses output via resistor divider; 0.9V reference point - determines regulated VOUT = 0.9V × (1 + RTOP/RBOT) |
| NC (Pins 6,7) | No connection | Internally unconnected - must remain floating; no routing or soldering required |
| PG (Pin 8) | Power Good indicator | Open-drain active-low output; asserts after 10 ms delay once VOUT exceeds 93% of target - used for system sequencing |
| EN (Pin 9) | Enable control | Logic-level input (VIH ≥ 2.2V, VIL ≤ 0.8V); internally pulled up to 4.2V - pulling low disables regulator and reduces IQ to 5–10 µA |
| BOOST (Pin 10) | Bootstrap drive | Supplies gate drive for high-side FET; requires 22 nF ceramic cap between BOOST and SW - auto-replenished every 8 cycles |
| PGND (Pins 14,15) | Power ground | Return path for low-side switch current - separate from SGND to prevent switching noise injection into control loop |
| EP (Pin 17) | Exposed thermal pad | Thermal and electrical ground connection - must be soldered to large PCB copper area for θJA = 38.5°C/W performance |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual N-channel MOSFETs | Eliminates external power switches and gate drivers - reduces BOM count and layout complexity for 3A buck designs |
| Internal compensation | Enables stable operation with only input/output capacitors and inductor - no external compensation network required |
| Stable with ceramic capacitors | Supports low-ESR, high-frequency MLCCs for compact, low-noise output filtering without tantalum or electrolytic dependencies |
| Power Good (PG) open-drain output | Provides system-level power sequencing signal with 10 ms release timer - interfaces directly with FPGA/CPU reset controllers |
| Peak current mode control | Delivers fast transient response to load steps while simplifying loop design - avoids instability from LC double pole |
| BOOST capacitor auto-replenishment | Maintains high-side gate drive at >95% duty cycle by forcing 240 ns off-time every 8 cycles - ensures reliable operation near VIN/VOUT limits |
Applications
| PIC®/dsPIC® Microcontroller Bias Supply | 12V Industrial Input DC-DC Conversion |
|---|---|
Use Scenario: Powering 3.3V or 1.8V core/logic rails for PIC32 or dsPIC33 microcontrollers in factory automation controllers. IC Role / Device Role / Timing Role: Primary synchronous buck regulator delivering tightly regulated, low-noise VDD with soft-start and PG signaling for safe MCU boot. Use Value: 3A capacity supports multi-rail SoC loads; ±1.5% reference accuracy maintains digital logic margins across temperature. | Use Scenario: Converting unregulated 12V bus (e.g., from DIN rail supply) to 5V/3.3V for I/O modules, sensors, and communication interfaces. IC Role / Device Role / Timing Role: High-efficiency, thermally robust DC-DC stage replacing linear regulators or discrete buck solutions in space-constrained enclosures. Use Value: 95% typical efficiency at full load reduces heat sink requirements; QFN-16 footprint fits dense industrial PCB layouts. |
| SLA Battery Powered Devices | AC-DC Digital Control Power Source |
Use Scenario: Regulating 6–14V output from sealed lead-acid batteries to 3.3V for wireless sensor nodes or portable test equipment. IC Role / Device Role / Timing Role: Input-wide buck converter with UVLO (5.75V start) preventing brownout operation as battery discharges. Use Value: 5 µA shutdown current extends battery life; 7% minimum duty cycle enables stable 3.3V output even at 14V battery peak. | Use Scenario: Providing auxiliary 5V/3.3V rails in digitally controlled AC-DC adapters using PFC + LLC topologies. IC Role / Device Role / Timing Role: Secondary-side synchronous buck supplying isolated controller ICs, gate drivers, and communication ICs. Use Value: PG pin synchronizes with primary-side enable signals; BOOST auto-replenishment ensures reliability during burst-mode operation. |
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 2.2A rating, 2.5–18V input, 1.2MHz, integrated BOOT diode - no external BOOST cap needed | Targeted for newer designs; lacks PG pin and has lower current rating than MCP16323T-ADJE/NG's 3A | Select MIC24046-YML when BOOST capacitor elimination and higher frequency outweigh need for PG signaling and 3A headroom |
| TPS54332DR | 3A, 3.5–28V input, 1MHz, external COMP, no integrated low-side FET - requires external MOSFET and compensation | Offers wider input range and design flexibility but increases component count and layout effort | Choose TPS54332DR only if input exceeds 18V or if external FET selection is required for thermal management |
Compared with MIC24046-YML and TPS54332DR, the MCP16323T-ADJE/NG uniquely combines 3A output, PG indication, internal compensation, and BOOST auto-replenishment in a single QFN-16 package - making it optimal for cost-sensitive, space-constrained 6–18V industrial and embedded applications where full integration and sequencing support are critical.
Availability
MCP16323T-ADJE/NG is available at Aetrix Electronics and suitable for PIC®/dsPIC® microcontroller bias supplies, 12V industrial DC-DC conversion, and SLA battery-powered devices requiring stable component supply and long-term production continuity.
Supply support for MCP16323T-ADJE/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 leading provider of microcontrollers, analog, interface, and power management ICs, serving industrial, automotive, and consumer markets with high-reliability semiconductor solutions.
The MCP16323 product line delivers highly integrated, synchronous buck regulators optimized for 6–18V input industrial and embedded systems - emphasizing minimal external components, thermal robustness, and seamless integration with Microchip's MCU ecosystem.
FAQ
What is the maximum continuous output current of the MCP16323T-ADJE/NG?
The MCP16323T-ADJE/NG delivers 3A continuous output current across its 0.9V–5.0V adjustable range when thermally managed per θJA = 38.5°C/W. At 5V output, minimum input voltage is recommended at 6.5V due to duty cycle limitations; full 3A is confirmed at 3.3V and 12V input per datasheet Figure 2-8.
Does the MCP16323T-ADJE/NG require an external bootstrap capacitor?
Yes, the MCP16323T-ADJE/NG requires a 22 nF ceramic capacitor between BOOST and SW pins to drive the high-side N-channel MOSFET. The device automatically replenishes this capacitor for 240 ns every eight switching cycles - a key feature enabling reliable operation near 95% duty cycle without external charge pumps.
How does the Power Good (PG) pin function on the MCP16323T-ADJE/NG?
The PG pin on the MCP16323T-ADJE/NG is an open-drain, active-low output that remains low until VOUT exceeds 93% of its target (e.g., 3.09V for 3.3V output), then waits 10 ms before releasing. It can be pulled up to any voltage ≤6V and interfaces directly with microcontroller reset inputs or FPGA configuration sequencers.
What is the feedback reference voltage and tolerance for the MCP16323T-ADJE/NG?
The MCP16323T-ADJE/NG uses an internal 0.9V reference with ±1.5% tolerance over –40°C to +125°C junction temperature. This sets VOUT = 0.9V × (1 + RTOP/RBOT), and the tolerance directly contributes to overall output voltage accuracy - confirmed in DC CHARACTERISTICS Table on DS20002284B-page 3.
Can the MCP16323T-ADJE/NG operate with ceramic output capacitors only?
Yes, the MCP16323T-ADJE/NG is explicitly designed to be stable with ceramic output capacitors - a key advantage over older buck controllers requiring tantalum or electrolytic types. Its internal compensation and peak current mode architecture eliminate the need for ESR-based damping, enabling compact, low-noise 2×22 µF MLCC configurations as shown in typical application circuits.
MCP16323T-ADJE/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:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 6V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 5V
- 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-ADJE/NG FAQ
1.How can I place an order for MCP16323T-ADJE/NG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16323T-ADJE/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-ADJE/NG reliable?
The price and inventory of MCP16323T-ADJE/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-ADJE/NG is usually 5 days.
3.What payment methods are accepted for MCP16323T-ADJE/NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16323T-ADJE/NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16323T-ADJE/NG?
MCP16323T-ADJE/NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16323T-ADJE/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-ADJE/NG?
For technical support, including MCP16323T-ADJE/NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16323T-ADJE/NG requirements.
6.How does Aetrix verify that MCP16323T-ADJE/NG is sourced from the original manufacturer or authorized distributors?
All MCP16323T-ADJE/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-ADJE/NG meets industry standards.
7.What is the process for return or replacement of MCP16323T-ADJE/NG?
All MCP16323T-ADJE/NG units undergo pre-shipment inspection (PSI). If there is an issue with MCP16323T-ADJE/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-ADJE/NG part is unused and in its original packaging.
Return procedure for MCP16323T-ADJE/NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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