ISL91110IRNZ-T

Voltage - Input (Max):	5.5V
Supplier Device Package:	20-QFN (4x4)
Package / Case:	20-VFQFN Exposed Pad
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C (TA)
Synchronous Rectifier:	No
Frequency - Switching:	2.5MHz
Current - Output:	2A
Voltage - Output (Max):	--
Voltage - Output (Min/Fixed):	3.3V
Series:	--
Voltage - Input (Min):	1.8V
Number of Outputs:	1
Output Type:	Fixed
Topology:	Buck-Boost
Output Configuration:	Positive
Function:	Step-Up/Step-Down
Part Status:	Active
Packaging:	Tape & Reel (TR)

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The ISL91110IRNZ-T is a highly optimized, integrated DC/DC switching regulator designed to meet the needs of products in a wide range of application fields. It is a leadless chip carrier, PDP package type PMIC (power management integrated circuit) that has become increasingly popular in the design of voltage regulation circuits. The ISL91110IRNZ-T switch mode regulation circuitry is designed to provide a highly optimized, efficient and low power voltage regulation circuit with relatively few external components. It includes a highly integrated sense, control and protection circuitry. This switch mode regulation circuitry is a key component of the integrated DC / DC switching regulator. The main features of the ISL91110IRNZ-T switch mode regulator include a wide range of operations, operating temperature range of up to +170°C (TJ max), and low-cost, low-profile, and leadless chip carrier PDP packages. The ISL91110IRNZ-T also offers a high level of output voltage and current accuracy, excellent thermal performance and power conversion efficiency, and high electrical noise immunity.The ISL91110IRNZ-T is typically used for PMIC voltage regulation applications, DC/DC switching regulator applications and microprocessor voltage regulator applications. It is also used in computer peripherals and AC/DC or DC/DC power supplies. This integrated switch mode regulator is suitable for a wide range of input voltages and output currents.The working principle of the ISL91110IRNZ-T DC/DC switching regulator is based on the voltage regulation, current regulation, and pulse-width modulation (PWM) regulation. The circuit uses an internal power MOSFET which, under the control of the logic circuit, provides the step down, step up, and bidirectional conduction of current to the load. The PWM regulator generates a Pulse Train modulation (PTM) signal with a duty cycle that is proportional to the input voltage and the output current. This PTM signal controls the power MOSFET switch, thus providing the desired output voltage and current. It also provides an effective way to prevent over-voltage and over-current fault conditions.In addition, the ISL91110IRNZ-T uses an on-chip power-on reset circuit to detect under-voltage and over-voltage conditions. This allows the output voltage to be tightly regulated within the specified limits. The internal logic also provides a Power Good output when the output voltage is within the required limits. Overall, the ISL91110IRNZ-T is a highly optimized, integrated DC/DC switching regulator that is ideal for a wide range of application fields. It offers excellent efficiency, high output current accuracy, and low cost. In addition, this device features a wide temperature operating range and a high level of electrical noise immunity.

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