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onsemi NCP81038MNTWG
- Part No.:
- NCP81038MNTWG
- Manufacturer:
- onsemi
- Category:
- Voltage Regulators - Linear + Switching
- Package:
- 28-VFQFN Exposed Pad
- Datasheet:
-
NCP81038MNTWG.pdf
- Description:
- IC REG QUAD BUCK/LINEAR 28QFN
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
NCP81038MNTWG from onsemi is a synchronous buck controller with auto power-saving behavior for compact DC/DC power stages. The device controls external MOSFETs and uses adaptive-ripple control to deliver regulated step-down power while supporting light-load efficiency and protection functions.
As part of the NCP81038 product family, NCP81038MNTWG combines synchronous gate drivers, differential current sensing, 800mV feedback regulation, power-good monitoring, overcurrent protection, short-circuit protection, overvoltage protection, undervoltage protection, and a 28-pin QFN package. For engineers reviewing the NCP81038MNTWG datasheet, NCP81038MNTWG pinout, NCP81038MNTWG application, or NCP81038MNTWG equivalent, this device is widely used in notebook power rails, embedded computing boards, adapter-powered systems, local high-current supplies, industrial control modules, and compact synchronous buck converter designs.
Technical Context
In embedded and computing power systems, NCP81038MNTWG operates as a controller for an external synchronous buck power stage. The IC drives high-side and low-side MOSFETs while regulating output voltage through an 800mV feedback reference.
The differential current-sense amplifier supports current monitoring across the power stage, while power-good, overcurrent, short-circuit, overvoltage, and undervoltage functions help protect downstream electronics during startup and fault conditions.
NCP81038MNTWG is commonly used where adaptive-ripple control, auto power saving, strong gate-drive control, 28-pin QFN integration, and detailed fault supervision are required for a step-down supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Device Type | Synchronous buck controller with auto power saving. |
| Control Architecture | Adaptive-ripple control for synchronous step-down conversion. |
| Feedback Reference | 800mV typical feedback reference. |
| Current Sense | Differential current-sense amplifier for power-stage monitoring. |
| Gate Drive | High-side and low-side MOSFET gate-driver outputs. |
| Monitoring | Power-good output with startup and fault timing behavior. |
| Protection | OCP, short-circuit OCP, OVP, UVP, UVLO, and thermal-related protection behavior. |
| Package | MNTWG indicates 28-pin QFN tape-and-reel package. |
Pinout & Package
The NCP81038MNTWG pinout includes controller supply, bootstrap/high-side gate drive, low-side gate drive, switch node, current-sense inputs, feedback, compensation/control pins, power-good output, enable/control functions, and ground pins.
For PCB design, MOSFET gate-drive loops and bootstrap paths should be short, current-sense lines should be routed as a quiet differential pair, and feedback/compensation nodes should avoid the switch node.
| Pin / Function | PCB Design and Circuit Role |
|---|---|
| VCC | Controller supply input with UVLO behavior. |
| BST / GH | Bootstrap and high-side gate-drive functions. |
| GL | Low-side MOSFET gate-drive output. |
| SWN | Switch-node reference for high-side drive. |
| CSP / CSN | Differential current-sense inputs. |
| FB | Feedback input using the 800mV reference. |
| PGOOD | Power-good status output for system supervision. |
| GND / PGND | Control and power ground returns. |
Key Features
- Synchronous buck controller drives external MOSFETs.
- Auto power-saving behavior improves light-load efficiency.
- Adaptive-ripple control supports fast regulation.
- Differential current sensing supports protection and control.
- Power-good output supports sequencing.
- Multiple fault protections improve converter reliability.
Applications
| Notebook Power Rails | Embedded Computing |
|---|---|
|
Use Scenario: Used in local system voltage rails. IC Role: Controls an external synchronous buck stage. Use Value: Supports efficient computing power conversion. |
Use Scenario: Used on processor and peripheral boards. IC Role: Provides regulated step-down control. Use Value: Allows power-stage current scaling. |
| Industrial Control Modules | High-Current Local Supplies |
|
Use Scenario: Used in controller and I/O boards. IC Role: Implements robust local DC/DC conversion. Use Value: Improves protection and supervision. |
Use Scenario: Used where integrated regulators are not sufficient. IC Role: Drives selected external MOSFETs. Use Value: Supports thermal and current design flexibility. |
Equivalent & Alternatives
When evaluating a NCP81038MNTWG equivalent, engineers should compare control architecture, gate-drive capability, feedback reference, current-sense method, package, power-good behavior, and fault protections.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| NCP81074MNTXG | onsemi synchronous buck controller with different control and feature details. | Used in similar external-MOSFET buck power stages. | Compare pinout, gate-drive requirements, protection behavior, and control-loop design. |
| TPS51219RTER | Texas Instruments synchronous buck controller with different control architecture and package. | Used in computing and embedded step-down supplies. | Compare feedback reference, current-sense method, package, and power-good behavior. |
Compared with NCP81074MNTXG, NCP81038MNTWG should be selected when its adaptive-ripple control and 28-pin QFN pinout match the board. NCP81038MNTWG vs TPS51219RTER selection depends on control method, gate-drive requirements, sensing approach, protection thresholds, and PCB compatibility.
Quality
NCP81038MNTWG should be sourced as original onsemi components through traceable supply channels. Quality checks may include QFN package inspection, top-mark validation, solderability testing, and synchronous gate-drive verification.
Production validation should include feedback accuracy, current-sense behavior, power-good timing, OCP/OVP/UVP response, auto power-saving operation, thermal behavior, and load transient stability.
Availability
NCP81038MNTWG available at Aetrix Electronics and is suitable for notebook, embedded computing, industrial control, and local synchronous buck power systems requiring controller supply support.
Supply support may include volume procurement planning, scheduled delivery arrangements, traceable sourcing management, and long-term supply support for OEM, industrial electronics, automotive electronics, and embedded product programs. Sample and NPI supply support, as well as urgent in-stock supply support, can also be arranged for prototype builds, pilot runs, and time-critical production needs.
For production builds, confirming package, MOSFET design, control-loop compensation, fault thresholds, lifecycle status, and sourcing continuity helps reduce procurement risk.
Manufacturer
onsemi is a semiconductor manufacturer focused on intelligent power, sensing, analog, mixed-signal, discrete, and connectivity technologies for automotive, industrial, cloud power, medical, and consumer applications.
The NCP81038 product family is an onsemi synchronous buck controller series with auto power saving and adaptive-ripple control for external-MOSFET step-down power stages.
FAQ
What is NCP81038MNTWG used for?
NCP81038MNTWG is used for notebook power rails, embedded computing boards, industrial control modules, and local high-current synchronous buck supplies.
Where can I find the NCP81038MNTWG datasheet download?
The NCP81038MNTWG datasheet is available from onsemi and includes electrical characteristics, pin descriptions, package data, and application guidance.
What should be considered in NCP81038MNTWG pinout design?
Designers should keep gate-drive paths short, route current-sense inputs carefully, and isolate feedback traces from switch-node noise.
Is NCP81038MNTWG a controller or integrated regulator?
It is a synchronous buck controller that drives external MOSFETs.
What are common NCP81038MNTWG equivalent solutions?
Common candidates include NCP81074MNTXG and TPS51219RTER depending on control method, package, protection, and gate-drive requirements.
NCP81038MNTWG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 28-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Topology:
- Step-Down (Buck) (2), Linear (LDO) (2)
- Number of Outputs:
- 4
- Frequency - Switching:
- 300kHz, 400kHz, 600kHz
- Voltage/Current - Output 1:
- Controller
- Voltage/Current - Output 2:
- Controller
- Voltage/Current - Output 3:
- 5V, 60mA
- w/LED Driver:
- No
- w/Supervisor:
- No
- w/Sequencer:
- No
- Voltage - Supply:
- 5.5V ~ 28V
- Operating Temperature:
- 0°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 28-QFN (4x4)
NCP81038MNTWG FAQ
1.How can I place an order for NCP81038MNTWG through Aetrix?
Please submit a Request for Quotation (RFQ) for NCP81038MNTWG 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 NCP81038MNTWG reliable?
The price and inventory of NCP81038MNTWG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for NCP81038MNTWG is usually 5 days.
3.What payment methods are accepted for NCP81038MNTWG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for NCP81038MNTWG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for NCP81038MNTWG?
NCP81038MNTWG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your NCP81038MNTWG 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 NCP81038MNTWG?
For technical support, including NCP81038MNTWG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your NCP81038MNTWG requirements.
6.How does Aetrix verify that NCP81038MNTWG is sourced from the original manufacturer or authorized distributors?
All NCP81038MNTWG 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 NCP81038MNTWG meets industry standards.
7.What is the process for return or replacement of NCP81038MNTWG?
All NCP81038MNTWG units undergo pre-shipment inspection (PSI). If there is an issue with NCP81038MNTWG, 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 NCP81038MNTWG part is unused and in its original packaging.
Return procedure for NCP81038MNTWG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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