The ISL6440IAZ-TK is a high-performance, dual-output PWM controller optimized for converting wall adapter, battery or network intermediate bus DC input supplies into the system supply voltages required for a wide variety of applications. Each output is adjustable down to 0.8V. The two PWMs are synchronized 180o out of phase reducing the RMS input current and ripple voltage. The ISL6440IAZ-TK incorporates several protection features. An adjustable overcurrent protection circuit monitors the output current by sensing the voltage drop across the lower MOSFET. Hiccup mode overcurrent operation protects the DC/DC components from damage during output overload/short circuit conditions. Each PWM has an independent logic-level shutdown input (SD1 and SD2). A single PGOOD signal is issued when soft-start is complete on both PWM controllers and their outputs are within 10% of the set point. Thermal shutdown circuitry turns off the device if the junction temperature exceeds +150°C.
Feature
- Wide Input Supply Voltage Range
- 5.6V to 24V
- 4.5V to 5.6V
- Two Independently Programmable Output Voltages
- Switching Frequency 300kHz
- Out of Phase PWM Controller Operation
- Reduces Required Input Capacitance and Power Supply Induced Loads
- No External Current Sense Resistor
- Uses Lower MOSFET's rDS(ON)
- Programmable Soft-Start
- Extensive Circuit Protection Functions
- PGOOD
- UVLO
- Overcurrent
- Overtemperature
- Independent Shutdown for Both PWMs
- Excellent Dynamic Response
- Voltage Feed-Forward with Current Mode Control
- Pb-Free Plus Anneal Available (RoHS Compliant)
