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NCP81276MNTXG The ON Semiconductor NCP81276MNTXG is a 4-phase DC DC switching controller designed for computing and graphics processors. It operates with a supply voltage range of 4.5V to 20V and offers a switching frequency up to 1.2MHz.
Mfr Part #:

NCP81276MNTXG

Available from 2 distributors
Mfr Name: On Semiconductor
On Semiconductor
The ON Semiconductor NCP81276MNTXG is a 4-phase DC DC switching controller designed for computing and graphics processors. It operates with a supply voltage range of 4.5V to 20V and offers a switching frequency up to 1.2MHz.
✓ Total Stock: 5,439 pcs
$ Price Range: $0.78

NCP81276MNTXG Available from 2 distributors

✓ Authorised
✓ Non-Authorised
Distributor Stock Pricing MOQ PKG Lead Time Date Code On Order Quantity On Order Delivery
Flip Electronics ✓
Non-Authorised Inventory information
5,000 pcs
On Request
5000 pcs On Request 1 On Request On Request On Request On Request On Request
Smaxon Electronics ✓
Non-Authorised Inventory information
439 pcs
On Request
439 pcs On Request 1 On Request On Request 16+ On Request On Request
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NCP81276MNTXG Specifications Quick View

Most important parameters for selection – full specs in datasheet.
Category
Manufacturer Name
Clock Sync
Control Features
Frequency
Function
Mounting Type
Number of Outputs
Operating Temperature
Output Configuration
Output Phases
Output Type
Serial Interfaces
Supplier Device Package
Supplier Package
Synchronous Rectifier
Topology
Voltage
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NCP81276MNTXG Description

Short technical summary and product information.

The NCP81276MNTXG from ON Semiconductor is a multiphase synchronous buck controller optimized for advanced computing and graphics processors. This device supports up to 4 phases, incorporating differential voltage and phase current sensing for accurate power regulation. It features a wide supply voltage range of 4.5 V to 20 V and a switching frequency adjustable from 250 kHz to 1.2 MHz when operating with 4 phases.

 

Key functionalities include PWM_VID and I2C interfaces for control, along with integrated power saving features like the Power Saving Interface (PSI) for improved light-load efficiency. The controller also provides essential protection features such as Under Voltage Protection (UVP), Over Voltage Protection (OVP), and Over Current Protection (OCP). Its dual-edge PWM multiphase architecture ensures fast transient response and dynamic current balancing.

 

Designed for applications like GPU and CPU power, graphic cards, and desktop/notebook systems, the NCP81276MNTXG is housed in a compact 40-pin QFN package measuring 5x5 mm with a 0.4 mm pitch. It is suitable for surface mount applications and operates within a temperature range of -10°C to 100°C.

NCP81276MNTXG Quick Information

Product Type: DC DC Switching Controller
Canonical Name: NCP81276 4/3/2/1 Phase Buck Controller with PWM_VID and I2C Interface
Subcategory: PMIC - Voltage Regulators - DC DC Switching Controllers

NCP81276MNTXG Compliance

RoHS Status: RoHS Compliant
Moisture Sensitivity Level (MSL): 1 Unlimited
REACH Status: REACH Unaffected

NCP81276MNTXG Estimated Pricing

Qty Low High
1+ $0.78 $0.78

Estimated market price range - modelled values for guidance only, not live distributor offers.

NCP81276MNTXG Features

  • Supports up to 4 phases for power delivery.
  • Wide 4.5 V to 20 V supply voltage range.
  • Switching frequency up to 1.2 MHz.
  • Features PWM_VID and I2C control interfaces.
  • Compact 40-QFN surface mount package.

NCP81276MNTXG Applications

  • Ideal for CPU and GPU power.
  • Suitable for graphic card designs.
  • Used in desktop computer systems.
  • Applicable in notebook power solutions.

NCP81276MNTXG FAQs

7 frequently asked questions generated from this part’s specifications.
What is the supply voltage range of the NCP81276MNTXG?

4.5 V to 20 V.

What package does the NCP81276MNTXG come in?

40-VFQFN exposed pad (40-QFN 5x5 mm).

What is the operating temperature range of the NCP81276MNTXG?

-10°C to 100°C.

What switching frequency does the NCP81276MNTXG support?

250 kHz to 1.2 MHz in 4-phase operation.

How many output phases does the NCP81276MNTXG have?

4 phases.

What control features are included on the NCP81276MNTXG?

Current limit, enable, frequency control, power good, ramp, and soft start.

What serial interfaces does the NCP81276MNTXG support?

I²C and PSI.

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