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Microchip Technology MCP16322T-ADJE/NG
- Part No.:
- MCP16322T-ADJE/NG
- Manufacturer:
- Microchip Technology
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
MCP16322T-ADJE/NG.pdf
- Description:
- IC REG BUCK ADJ 2A 16QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,811
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Product details
Overview
MCP16322T-ADJE/NG from Microchip Technology is a synchronous step-down DC-DC converter IC delivering up to 2A output current with adjustable 0.9V–5.0V output voltage, 1 MHz fixed switching frequency, 95% typical efficiency, and integrated 180 mΩ high-side and 120 mΩ low-side N-channel MOSFETs - used in industrial 12V input power rails and PIC® microcontroller bias supplies.
For engineers reviewing the MCP16322T-ADJE/NG datasheet, MCP16322T-ADJE/NG pinout, MCP16322T-ADJE/NG application, or MCP16322T-ADJE/NG equivalent, key selection criteria include its adjustable VOUT range (0.9–5.0V), thermal shutdown at 170°C, 5.75V UVLO start threshold, PG open-drain power-good signaling, and QFN-16 (3×3 mm) package with exposed thermal pad.
Technical Context
The MCP16322T-ADJE/NG implements peak current mode control with internal slope compensation and a fixed 1 MHz oscillator, enabling fast transient response and stable regulation across input steps (6–24V) and load transients (0–2A). Its architecture integrates both high-side and low-side N-MOSFETs with on-resistances of 180 mΩ and 120 mΩ respectively, eliminating external switches and reducing board area.
It features internal soft-start (4 ms), cycle-by-cycle current limiting, overvoltage protection (103% VOUT), undervoltage lockout (5.75V start, 0.65V hysteresis), and overtemperature shutdown (170°C trip, 160°C recovery). The feedback reference is 0.9V ±1.5%, supporting precise output adjustment via external resistor divider.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 2 A continuous - supports high-current digital loads like microcontrollers and FPGAs without external current boosting. |
| Input Voltage Range | 6.0 V to 24 V - compatible with 12 V industrial bus, automotive battery systems, and wall adapter inputs. |
| Switching Frequency | 1 MHz ±10% - enables compact 4.7 µH inductors and ceramic output capacitors for space-constrained designs. |
| Feedback Reference | 0.9 V ±1.5% - sets output voltage via external resistor divider; enables accurate 0.9–5.0 V regulation with minimal drift over temperature. |
| UVLO Threshold | 5.75 V (typical) with 0.65 V hysteresis - prevents erratic startup during brown-out conditions and ensures reliable turn-on above minimum rail stability. |
| Thermal Shutdown | 170 °C die temperature - protects against sustained overload or poor PCB thermal design; resumes operation at 160 °C. |
| Power Good Delay | 10 ms after VOUT reaches 93% of target - provides clean system-level sequencing for downstream logic and processors. |
Pinout & Package
Package: 16-pin QFN (3 mm × 3 mm, 0.5 mm pitch) with exposed thermal pad (EP) requiring PCB ground 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 trace routing. |
| VIN (Pins 2,3,11) | Input supply | Dual-purpose: powers internal circuitry and high-side gate driver; must be decoupled with ≥2×10 µF ceramic near pins. |
| SGND (Pin 4) | Signal ground | Analog reference and control loop return - isolated from PGND to minimize noise coupling into feedback path. |
| VFB (Pin 5) | Feedback input | Senses output voltage via resistor divider; 0.9 V reference enables precise adjustable regulation with <1.5% tolerance. |
| PG (Pin 8) | Power good indicator | Open-drain active-low output; asserts after 10 ms once VOUT exceeds 93% of target - used for system enable sequencing. |
| EN (Pin 9) | Enable control | Logic-level input (VIH ≥2.2 V, VIL ≤0.8 V); internally pulled up to 4.2 V - allows simple ON/OFF control with no external pull-up needed. |
| BOOST (Pin 10) | Bootstrap drive | Supplies gate voltage for high-side N-MOSFET; requires 22 nF ceramic capacitor between BOOST and SW for proper high-side turn-on. |
| PGND (Pins 14,15) | Power ground | Return path for low-side switch and inductor current - separated from SGND to prevent switching noise from corrupting analog circuits. |
| NC (Pins 6,7) | No connection | Unbonded pins - must remain unconnected and unpopulated on PCB. |
| EP (Pin 17) | Exposed thermal pad | Electrically isolated copper pad; must be soldered to solid PCB ground plane for thermal dissipation and EMI suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated dual N-MOSFETs | 180 mΩ high-side + 120 mΩ low-side - eliminates external switches, reduces BOM count, and improves efficiency vs discrete solutions. |
| Internal compensation | Full error amplifier + slope compensation - removes need for external compensation network, simplifying layout and validation. |
| Ceramic capacitor support | Stable with low-ESR MLCCs - enables smaller, lower-cost output filtering without tantalum or electrolytic capacitors. |
| Peak current mode control | Fast transient response and inherent cycle-by-cycle current limiting - maintains regulation during rapid load steps without external current sense resistors. |
| Power Good (PG) monitoring | Open-drain output with 10 ms release timer - provides deterministic system-level power sequencing for MCUs, FPGAs, and ASICs. |
Applications
| Industrial Power Rail Regulation | PIC®/dsPIC® Microcontroller Bias Supply |
|---|---|
Use Scenario: Regulating 12 V or 24 V industrial bus to 3.3 V or 5 V for PLC I/O modules, motor drivers, and sensor interfaces. IC Role / Device Role / Timing Role: Primary synchronous buck regulator providing stable, high-efficiency local power with thermal and overvoltage protection. Use Value: Delivers 2 A continuous output with <2% output voltage accuracy and 95% efficiency at full load - reduces heat sink requirements and improves system MTBF. | Use Scenario: Supplying core and I/O voltage to PIC® or dsPIC® microcontrollers in embedded control applications. IC Role / Device Role / Timing Role: Adjustable-output DC-DC converter configured for 1.8 V, 2.5 V, or 3.3 V with tight regulation under dynamic MCU load profiles. Use Value: Internal soft-start (4 ms) prevents inrush current and output overshoot during MCU reset; PG signal enables safe firmware initialization sequence. |
| AC-DC Digital Control Power Source | SLA Battery-Powered Devices |
Use Scenario: Secondary-side regulation stage in digitally controlled AC-DC adapters or SMPS with variable output requirements. IC Role / Device Role / Timing Role: High-input-voltage synchronous buck controller accepting wide-range rectified DC input (e.g., 12–24 V from flyback secondary). Use Value: 6–24 V input range accommodates varying transformer turns ratios and line/load regulation; 1 MHz switching minimizes magnetics size in compact adapters. | Use Scenario: Power conversion for sealed lead-acid (SLA) battery systems (12 V nominal) powering portable test equipment or backup sensors. IC Role / Device Role / Timing Role: Step-down regulator maintaining constant 3.3 V or 5 V output as battery voltage drops from 13.8 V to 10.5 V. Use Value: Undervoltage lockout (5.75 V start) prevents operation below safe battery threshold; 5 µA shutdown current extends 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-E/MS | Same 2 A rating, but 3–28 V input range and 2.2 MHz switching; lacks PG pin and has different EN threshold (1.25 V). | Better suited for higher-frequency, ultra-compact designs where PG sequencing is not required. | Select when board space is critical and 2.2 MHz operation enables smaller inductors; avoid if PG signal or 1 MHz EMI profile is mandatory. |
| MIC24046-YSYML | 2 A, 4.5–36 V input, 2.2 MHz, integrated PG and EN, but uses external compensation and requires more external components. | Designed for automotive-grade reliability with AEC-Q100 qualification; wider VIN supports cold-crank scenarios. | Choose for automotive or harsh-environment applications needing extended input range and qualification; accept added complexity for robustness. |
Compared with MCP16322T-ADJE/NG, MCP16312T-E/MS offers higher switching frequency and broader input range but omits power-good signaling, while MIC24046-YSYML adds automotive qualification and wider VIN at the cost of increased external component count and layout sensitivity.
Availability
MCP16322T-ADJE/NG is available at Aetrix Electronics and suitable for industrial power rail regulation, PIC® microcontroller bias supply, and SLA battery-powered devices requiring stable component supply and long-term production continuity.
Supply support for MCP16322T-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 devices, and power management ICs, headquartered in Chandler, Arizona, with global design and manufacturing operations.
The MCP16321/2 product line delivers highly integrated synchronous buck regulators targeting cost-sensitive, space-constrained industrial and embedded applications requiring high efficiency, wide input range, and minimal external components.
FAQ
What is the maximum output current capability of the MCP16322T-ADJE/NG?
The MCP16322T-ADJE/NG delivers up to 2 A of continuous output current across its full operating temperature range (-40°C to +125°C junction), verified under 6–24 V input conditions with appropriate thermal management and external components per Microchip's DS20002285B design guidelines.
Does the MCP16322T-ADJE/NG support adjustable output voltage, and what is its accuracy?
Yes, the MCP16322T-ADJE/NG is the adjustable version of the MCP16322 family and supports output voltages from 0.9 V to 5.0 V using an external resistor divider. Its internal 0.9 V reference has ±1.5% tolerance, resulting in tightly regulated output with minimal drift over temperature and line/load conditions.
What package type and thermal considerations apply to the MCP16322T-ADJE/NG?
The MCP16322T-ADJE/NG uses a 16-pin QFN package (3 mm × 3 mm) with an exposed thermal pad (EP). For optimal thermal performance, the EP must be soldered to a dedicated PCB ground plane with ≥4 thermal vias; θJA is 38.5°C/W on a 4-layer board with internal ground plane per DS20002285B.
How does the Power Good (PG) pin function on the MCP16322T-ADJE/NG?
The PG pin on the MCP16322T-ADJE/NG is an open-drain, active-low output that remains low until VOUT exceeds 93% of its target value, then waits 10 ms before releasing high. It supports pull-up to ≤6 V and is used for system-level power sequencing - ensuring downstream logic only activates after stable regulation is achieved.
Is the MCP16322T-ADJE/NG pin-compatible with other members of the MCP16321/2 family?
Yes, all MCP16321/2 variants - including fixed-output versions (e.g., MCP16322T-330E/NG) and the adjustable MCP16322T-ADJE/NG - share identical QFN-16 (3×3 mm) pinouts and footprint. This allows direct substitution within the same family for voltage reconfiguration without PCB redesign.
MCP16322T-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):
- 24V
- Voltage - Output (Min/Fixed):
- 0.9V
- Voltage - Output (Max):
- 5V
- 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-ADJE/NG FAQ
1.How can I place an order for MCP16322T-ADJE/NG through Aetrix?
Please submit a Request for Quotation (RFQ) for MCP16322T-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 MCP16322T-ADJE/NG reliable?
The price and inventory of MCP16322T-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 MCP16322T-ADJE/NG is usually 5 days.
3.What payment methods are accepted for MCP16322T-ADJE/NG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MCP16322T-ADJE/NG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MCP16322T-ADJE/NG?
MCP16322T-ADJE/NG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MCP16322T-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 MCP16322T-ADJE/NG?
For technical support, including MCP16322T-ADJE/NG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MCP16322T-ADJE/NG requirements.
6.How does Aetrix verify that MCP16322T-ADJE/NG is sourced from the original manufacturer or authorized distributors?
All MCP16322T-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 MCP16322T-ADJE/NG meets industry standards.
7.What is the process for return or replacement of MCP16322T-ADJE/NG?
All MCP16322T-ADJE/NG units undergo pre-shipment inspection (PSI). If there is an issue with MCP16322T-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 MCP16322T-ADJE/NG part is unused and in its original packaging.
Return procedure for MCP16322T-ADJE/NG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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