ISL9440A Overview
Each output is adjustable down to 0.8V. The PWMs are synchronized at 180° out of phase thus reducing the RMS input current and ripple voltage. The ISL9440, ISL9440A and ISL9441 offer internal soft-start, independent enable inputs for ease of supply rail sequencing, and integrated UV/OV/OC/OT protections in a space conscious 5mmx5mm QFN package.
ISL9440A Key Features
- Three integrated synchronous buck PWM controllers
- Internal bootstrap diodes
- Internal pensation
- Internal soft-start
- Independent control for each regulator and programmable output voltages; independent enable/shutdown
- Fixed Switching Frequency: 300kHz (ISL9440, ISL9441); 600kHz (ISL9440A)
- Adaptive shoot through protection on all synchronous buck controllers
- Independently programmable voltage outputs
- Out-of-phase switching to reduce input capacitance (0°/180°/0°)
- No external current sense resistor