Frequency - Switching:	50kHz ~ 750kHz
Base Part Number:	LM25119
Supplier Device Package:	32-WQFN (5x5)
Package / Case:	32-WFQFN Exposed Pad
Operating Temperature:	-40°C ~ 125°C (TJ)
Control Features:	Enable, Frequency Control, Ramp, Reset, Soft Start
Serial Interfaces:	--
Clock Sync:	No
Synchronous Rectifier:	Yes
Duty Cycle (Max):	--
Series:	Automotive, AEC-Q100
Voltage - Supply (Vcc/Vdd):	4.5 V ~ 42 V
Output Phases:	2
Number of Outputs:	2
Topology:	Buck
Output Configuration:	Positive
Function:	Step-Down
Output Type:	Transistor Driver
Part Status:	Active
Packaging:	Tape & Reel (TR)

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LM25119QPSQ/NOPB Application Field and Working Principle

Introduction

The LM25119QPSQ/NOPB is a synchronous step-down DC-DC converter developed by Texas Instruments. It enables the design of high efficiency and low cost solutions in a single package. The device supports higher output currents up to 2A, which allows it to be used as solutions in point-of-load (POL) and industrial applications. The device utilizes the company’s integrated high-voltage MOSFET technology, offering an efficiency of up to 95%. It is designed to operate in a wide input voltages range of 4.5V to 80V. The device further has a user-selectable enable pin, which enables easy multiple output adjustable for ON/OFF sequencing and fault handling.

PMIC – Voltage Regulators – DC DC Switching Controllers

DC DC switching controllers, sometimes known as buck converters, are used to step down a voltage from a higher voltage source (Input Voltage) to a lower voltage sink (Output Voltage) using their built-in MOSFETs. DC DC Switching controllers like the LM25119QPSQ/NOPB are typically used in order to provide power to sensitive electronic devices, as they are able to regulate the output voltage to a specific level. The LM25119QPSQ/NOPB is able to operate with wide input voltage range of 4.5V to 80V and is capable of providing an output current of up to 2A.

Applications

The LM25119QPSQ/NOPB can be used in applications such as Point-ofLoad (POL) applications, focusing on high efficiency and low cost. These applications require that the voltage is regulated to a certain level at the output and that the current is also locked to a certain level. The LM25119QPSQ/NOPB can provide this as it is able to operate with wide input voltage range of 4.5V to 80V and is capable of providing an output current of up to 2A. The LM25119QPSQ/NOPB can also be used in industrial applications such as data and telecom systems, where the output voltage needs to be regulated and a high current is required.

Working Principle

The LM25119QPSQ/NOPB works by using a voltage divider and a feedback loop. The voltage divider consists of two resistors connected between the input voltage (VIN) and output voltage (VOUT). The feedback loop consists of a comparator. The comparator is used to compare the voltage at the output with a reference voltage (VFB). If the output voltage is higher than the reference voltage, the comparator output will be high and the MOSFET switch will be turned on, allowing the current to flow from the input to the output. If the output voltage is lower than the reference voltage, the comparator output will be low and the MOSFET switch will be turned off, not allowing the current to flow from the input to the output.

Conclusion

The LM25119QPSQ/NOPB is a synchronous step-down DC-DC converter developed by Texas Instruments. It enables the design of high efficiency and low cost solutions in a single package. The device supports higher output currents up to 2A, which allows it to be used as solutions in point-of-load (POL) and industrial applications. The device utilizes the company’s integrated high-voltage MOSFET technology, offering an efficiency of up to 95%. It is designed to operate in a wide input voltages range of 4.5V to 80V, with a feedback loop consisting of a comparator, allowing for efficient regulation of the output voltage. The LM25119QPSQ/NOPB is typically used in order to provide power to sensitive electronic devices, as it is able to regulate the output voltage to a specific level.

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