NCV890101MWTXG

Voltage - Output (Min/Fixed):	0.8V
Base Part Number:	NCV890101
Supplier Device Package:	10-DFN (3x3)
Package / Case:	10-VFDFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 150°C (TJ)
Synchronous Rectifier:	No
Frequency - Switching:	2MHz
Current - Output:	1.2A
Voltage - Output (Max):	34V
Series:	--
Voltage - Input (Max):	36V
Voltage - Input (Min):	4.5V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Introduction

NCV890101MWTXG is a voltage-regulator in the DC-DC switching-regulator family of power-management ICs, otherwise known as PMICs. It is designed to be a simple system solution for low-power, low-pin-count voltage-regulation applications. NCV890101MWTXG boasts a wide range of features that make it an ideal choice for low voltage, low power applications. It is available in a variety of single-supply and dual-supply configurations as well as with external control for maximum flexibility.

Features

NCV890101MWTXG offers a wide range of features that make it a great choice for low-power, low-pin-count voltage-regulation applications. Some of these features include:* Integrated synchronous rectifier: This feature eliminates the need for an external sense resistor, allowing for a much more compact application. * Adjustable output voltage: The output voltage is adjustable from 0.9 V to 5.5 V, making it suitable for a variety of voltage-regulation applications. * Low quiescent current: Quiescent current is as low as 180 μA, allowing for very energy-efficient operation.* Overcurrent protection: NCV890101MWTXG is designed to shut down automatically if an overcurrent condition is detected, preventing damage to the circuit.

Applications

NCV890101MWTXG is well-suited for a variety of voltage-regulation applications. Its small size and low quiescent current make it an ideal choice for battery applications, such as mobile phones, digital cameras and portable audio players. It is also suitable for automotive applications, as well as for other low-voltage, low-power applications.

Working principle

NCV890101MWTXG is based on a synchronous buck-converter topology, a widely-used DC-DC buck-converter topology. It consists of an external MOSFET, an inductor, a capacitor, and the NCV890101MWTXG IC. The external MOSFET is responsible for switching current between the input voltage and the output voltage. The inductor acts as a filter and helps smooth out any voltage fluctuations, while the capacitor helps filter out any noise or ripple. The NCV890101MWTXG IC is responsible for controlling the switching frequency and the current flowing through the MOSFET, as well as for providing over-currentprotection. The working principle of the NCV890101MWTXG can be summarized as follows: the IC begins by measuring the voltage at the input and then turns on the MOSFET. This draws current from the input voltage and stores it in the inductor. When the inductor’s core is saturated, the MOSFET is turned off, and the current stored in the inductor is released through the capacitor. The output voltage is regulated by adjusting the switching frequency and the current flowing through the MOSFET.

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