ISL91107IRTAZ-T

Voltage - Input (Max):	5.5V
Supplier Device Package:	20-TQFN (3x4)
Package / Case:	20-WFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	Yes
Frequency - Switching:	2.5MHz
Current - Output:	2A
Voltage - Output (Max):	5.2V
Voltage - Output (Min/Fixed):	1V
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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Introduction

The ISL91107IRTAZ-T is a 2-phase DC-DC switching regulator with integrated MOSFETs, inductors and capacitors optimized to deliver up to 10A of output current. It is a device intended to be used in systems requiring high current and high reliability and power conversion applications, such as automotive, industrial, and communications systems.The ISL91107IRTAZ-T is an advanced and reliable switching regulator that features integrated control logic and an adaptive loop to ensure excellent output voltage regulation and high efficiencies over a wide load range. Its internal two-phase architecture, consisting of two parallel inductors and two parallel power MOSFETs, offers high switching frequency, low output ripple voltage, and guaranteed light load efficiency.

Application Field

The ISL91107IRTAZ-T is ideal for a variety of DC-DC conversion applications, such as automotive, industrial, and communications systems. It meets stringent automotive requirements, such as AEC-Q and is suitable for powering 12V and 24V automotive systems, as well as battery systems.Additionally, the ISL91107IRTAZ-T is ideal for low-side shunt applications, offering a low on resistance of 25mΩ to ensure efficient power delivery. It is also suitable for powering processor core voltages in industrial and communications systems, where extremely low noise and tight voltage regulation are critical.

Working Principle

The ISL91107IRTAZ-T operates with a fixed frequency, two-phase non-synchronous PFM (pulse frequency modulation) power stage. This leakage-free stage includes two parallel power MOSFETs, two internal inductors, and two diode rectifiers. This allows for extremely low output ripple voltage and excellent dynamic response. It also allows for very efficient operation at heavy, moderate, and light loads.The power stage is controlled by a dedicated internal logic engine, which includes a PFM control loop with built-in exponentials and an adaptive response loop. The adaptive response loop constantly monitors the output voltage and adjusts its gain to ensure excellent output voltage regulation.The ISL91107IRTAZ-T also features a power-good signal to allow for efficient connection to external components. It also has an enable pin to enable/disable the power stage, as well as adjustable soft-start and oscillator-start durations.

Conclusion

The ISL91107IRTAZ-T is a versatile 2-phase DC-DC switching regulator ideal for a variety of applications, including automotive, industrial, and communications systems. It features integrated control logic, an adaptive loop, and a PFM control loop to ensure excellent output voltage regulation and high efficiencies over a wide load range. Its leakage-free power stage, complete with two parallel power MOSFETs, two internal inductors, and two diode rectifiers enables extremely low output ripple voltage, excellent dynamic response, and efficient operation at heavy, moderate, and light loads.

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