ISL91133IIOZ-T

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ISL91133IIOZ-T is a DC-DC switching regulator from Intersil\'s flexilogic family of low power integrated regulators. It is used to power sensitive digital and analog circuits requiring very low quiescent currents. It features high efficiency, fast transient response, and low output noise. It is designed to operate with an input voltage range of 2.3V to 5.5V and output voltage range of 0.5V to 3.3V.

The ISL91133IIOZ-T application field can be classified as PMIC (Power Management Integrated Circuit), Voltage Regulators and DC-DC Switching Regulators. It is broadly used in automotive, industrial and general application systems, including mobile phones, tablets, cameras and similar power-driven systems. It is suitable for point of load (POL) topologies, allowing for adjustable output voltages in a wide range.

The ISL91133IIOZ-T is a pulse-frequency modulation (PFM) or pulse-width modulation (PWM) synchronous converter. The PFM or PWM switching regulates output voltage by driving the main switch with a programmable frequency, which is based on the power demands of the output load. The PFM modulated switching mode enables the device to maximize efficiency of the converter. The PWM mode ensures fast transient response and helps in breaking the tradeoff between input voltage range, output voltage range, loop performance and minimum operating current.

The ISL91133IIOZ-T integrates a precision voltage reference, regulating voltage, an on-chip compensation network, an internal hysteretic compensation loop and various protections circuits. It is 100% tested on full load and temperature, as well as burn in temperature cycling with soft start and over-current protection (OCP). These features make it reliable and robust with improved system stability and safety.

The ISL91133IIOZ-T device consists of two building blocks: a 4-phase interleaved buck converter and a high performance 3-phase buck converter, both independently configurable. It offers micro-contactors, external analogue or digital control of parameters and soft start. The flexible interfaces allow to control the system parameters such as peak current, cycle by cycle current limit, soft start and margin voltage.

The ISL91133IIOZ-T features an over-voltage protection (OVP) circuit which senses the output voltage and shuts down the regulator if it goes above the programmed limit. It also has an over-temperature protection (OTP) circuit which monitors the die temperature and shuts down the regulator if it reaches a temperature that exceeds its safe operating limit. It also has a short-circuit protection (SCP) circuit which detects short circuits and shuts down the regulator.

ISL91133IIOZ-T is a low power, high efficiency, robust DC-DC switching regulator device, offering a wide range of features that help in reducing design complexity, improving system stability and reliability, and providing good overall operational performance.

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