ISL91128IINZ-T7A

Voltage - Input (Max):	5.5V
Supplier Device Package:	20-WLCSP (4x5)
Package / Case:	20-XFBGA, WLCSP
Mounting Type:	Surface Mount
Operating Temperature:	--
Synchronous Rectifier:	Yes
Frequency - Switching:	2.5MHz
Current - Output:	2.4A
Voltage - Output (Max):	5V
Voltage - Output (Min/Fixed):	1.9V
Series:	--
Voltage - Input (Min):	1.8V
Number of Outputs:	1
Output Type:	Adjustable
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up, Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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DC DC Switching Regulators

DC-DC switching regulators are a type of power management systems used to provide regulated output voltage to a device. In the past, these systems have traditionally relied on linear regulators. However, with the demand for higher efficiency and better control, products have emerged to switch the input voltage so that it is regulated to a desired output voltage. The ISL91128IINZ-T7A is one such product in this category.The ISL91128IINZ-T7A is a high power PMIC (power management IC) Buck switching voltage regulator that offers a range of high-performance features, total system flexibility and superior power efficiency. It is specifically designed to provide an adjustable output from 1.3-3.3 V with a 4 A maximum output current. The part has adjustable current and power limit, as well as programmable over-voltage protection, making it suitable for a variety of automotive and industrial applications.On the functional side, ISL91128IINZ-T7A integrates a high-performance switching regulator, plus a low-side synchronous MOSFET and a high-side low RDS(ON) N-Channel MOSFET. It also has integrated loop compensation and a dynamic input voltage range of 6V to 50V. The output voltage is adjustable and the operating frequency can be programmed between 300 kHz and 2.2 MHz. The part also has various protection features, including over-temperature protection, under-voltage protection, over-voltage protection, current limit, power limit, and programmable thermal shutdown. In addition, there is an internal soft-start for ramping purposes. The ISL91128IINZ-T7A also has a power-on reset feature to ensure all the supply voltages are at their nominal values before the part is activated.In terms of its applications, the ISL91128IINZ-T7A is suitable for automotive and industrial applications where adjustable output voltage, high efficiency, and low noise are required. It can be used in systems that require battery supply voltage and a regulated voltage to the load. Examples of potential applications include battery-powered portable medical systems, automotive infotainment systems, industrial automation, and other portable electronic equipment.In terms of working principle, the ISL91128IINZ-T7A Buck switching regulator operates in a way so that the input voltage is continuously being switched between the high-side and low-side MOSFETs and the inductor is placed between the two MOSFETs so as to supply the output voltage. The switching speed is controlled by the oscillator, and when the output voltage reaches the predetermined value, the switching frequency can be adjusted to maintain the desired output voltage. Additionally, the part also has built-in compensation and regulation circuits to ensure accurate and reliable regulation.Overall, the ISL91128IINZ-T7A is a high-performance DC-DC Switching Regulator that offers optimal linear performance, high efficiency and high power density. It is designed for battery powered portable medical and industrial applications, and is compatible with a wide range of input and output voltages.

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