ISL6522IBZ-TS2698

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ISL6522IBZ-TS2698 is a DC DC switching controller designed as an adjustable step-down voltage regulator that operates over a wide input voltage range and requires fewer external components than competing regulators. This device features an adjustable output voltage, continuous output current up to 3 A, and low output voltage ripple and noise. The current-mode architecture provides ruggedness and stability for pulse-by-pulse current limit and fast line/load transient response.

The ISL6522IBZ-TS2698 is suitable for use in many applications such as telecommunications, computing and peripherals, low voltage distributed power system, consumer electronics, battery-powered systems, automotive, and green energy applications. It is suitable for use as a general purpose adjustable voltage converter, notably as a high-precision step-down regulator.

The ISL6522IBZ-TS2698 includes two integrated transistors to provide a fully featured, low-cost and space-saving solution that eliminates the need for a free-running oscillator, A/B comp ratio register, separate SS/TR inputs, and an IC with an adjustable output voltage feature. The internal transistors are designed to drive an external transformer primary winding and include an external sense resistor to regulate the output voltage. The device can be enabled by an on/off logic input, allowing the user to provide power just when it is needed. A programmable soft-start feature is also included and designed to eliminate inrush current.

The main functional blocks in the ISL6522IBZ-TS2698 are the oscillator, the linear controller, the current-limit comparator, and the driver. The oscillator is a voltage-controlled oscillator (VCO) with an adjustable duty cycle. The linear controller is a proportional-and-integral (PI) regulator that compares the VCO output voltage with the output voltage, and generates an internal voltage reference for the current-limit comparator. The current-limit comparator monitors the voltage drop across the sense resistor and, if the voltage drop exceeds the internal voltage reference, the oscillator is disabled until the current falls below the pre-programmed limit. The driver is designed to sink and source current to drive the external transformer winding.

The ISL6522IBZ-TS2698 features a wide input voltage range that covers all input voltage-levels between the maximum rating (up to 36V) and the minimum on-time voltage of 2.5V. It also offers thermal and over-voltage protection, an adjustable soft-start, an adjustable current limit, and an on/off logic input. In addition, the device includes an active high-side driver and a non-overlapping oscillator to reduce EMI emitted by the transformer.

The ISL6522IBZ-TS2698 is an adjustable step-down voltage regulator with features that make it ideal for a wide variety of applications. It offers a wide input voltage range, continuous output current up to 3 A, and low output voltage ripple and noise. It is suitable for use as a general purpose adjustable voltage converter and provides thermal and over-voltage protection, an adjustable soft-start, an adjustable current limit, and an on/off logic input. The current-mode architecture provides ruggedness and stability for pulse-by-pulse current limit and fast line/load transient response.

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