Hot selling ISL6522BIRZ Buck and Synchronous Rectifier Pulse-Width Modulator (PWM) DC-DC Controller IC 16-QFN

Product Descriptions

The ISL6522B provides complete control and protection for a DC-DC converter optimized for high-performance microprocessor applications. It is designed to drive two N-Channel MOSFETs in a synchronous rectified buck topology. The ISL6522B 

integrates all of the control, output adjustment, monitoring and protection functions into a single package.

The output voltage of the converter can be precisely regulated to as low as 0.8V, with a maximum tolerance of 1 PERCENT over temperature and line voltage variations.

The ISL6522B provides simple, single feedback loop, voltagemode control with fast transient response. It includes a 200kHz free-running triangle-wave oscillator that is adjustable from  below 50kHz to over 1MHz. The error amplifier features a 

15MHz gain-bandwidth product and 6V/µs slew rate which enables high converter bandwidth for fast transient performance. The resulting PWM duty ratio ranges from 0-100 PERCENT.

The ISL6522B protects against overcurrent conditions by inhibiting PWM operation. The ISL6522B monitors the current by using the rDS(ON) of the upper MOSFET which eliminates the need for a current sensing resistor.

Product Features

• Drives two N-Channel MOSFETs

• Operates from +5V or +12V input

• Simple single-loop control design

- Voltage-mode PWM control

• Fast transient response

- High-bandwidth error amplifier

- Full 0–100 PERCENT duty ratio

• Excellent output voltage regulation

- 0.8V internal reference

- 1 PERCENT  over line voltage and temperature

• Overcurrent fault monitor

- Does not require extra current sensing element

- Uses MOSFETs rDS(ON)

• Converter can source and sink current

• Pre-Biased Load Start Up

• Small converter size

- Constant frequency operation

- 200kHz free-running oscillator programmable from 50kHz to over 1MHz

• 14-lead SOIC package and 16-lead 5x5mm QFN Package

• QFN Package

- Compliant to JEDEC PUB95 MO-220 QFN-Quad Flat No Leads-Product Outline

- Near Chip-Scale Package Footprint; Improves PCB Efficiency and Thinner in Profile

• Pb-Free Available (RoHS Compliant)

Product Applications

• Power supply for Pentium®, Pentium Pro, PowerPC® and AlphaPC™ microprocessors

• FPGA Core DC/DC Converters

• Low-voltage distributed power supplies

Specifications

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