The ISL6535IBZ is a high performance synchronous controller for demanding DC/DC converter applications. It provides overcurrent fault protection and is designed to safely start-up into prebiased output loads. The output voltage of the converter can be precisely regulated to as low as 0.597V, with a maximum tolerance of ±1% over the commercial temperature range, and ±1.5% over the industrial temperature range.The ISL6535IBZ provides simple, single feedback loop, voltage mode control with fast transient response. It includes a triangle wave oscillator that is adjustable from below 50kHz to over 1.5MHz. Full (0% to 100%) PWM duty cycle support is provided.The error amplifier features a 15MHz gain bandwidth product and 6V/µs slew rate, which enables high converter bandwidth for fast transient performance.The ISL6535's overcurrent protection monitors the current by using the rDS(ON) of the upper MOSFET, which eliminates the need for a current sensing resistor.
Feature
- Operates from +12V input
- Excellent output voltage regulation
- 0.597V internal reference
- ±1% over the commercial temperature range
- ±1.5% over the industrial temperature range
- Simple single-loop control design
- Voltage-mode PWM control
- Fast transient response
- High-bandwidth error amplifier
- Full 0% to 100% duty ratio
- Leading and falling edge modulation
- Small converter size
- Constant frequency operation
- Oscillator programmable from 50kHz to over 1.5MHz
- 12V high-speed MOSFET gate drivers
- 2.0A source/3A sink at 12V low-side gate drive
- 1.25A source/2A sink at 12V high-side gate drive
- Drives two N-channel MOSFETs
- Overcurrent fault monitor
- High-side MOSFET’s rDS(ON) sensing
- Reduced ~120ns blanking time
- Converter can source and sink current
- Soft-start done and an external reference pin for tracking applications are available in the QFN package
- Pin compatible with ISL6522
- Supports start-up into prebiased loads
- Pb-free (RoHS compliant)
