Intersil – ISL85009/12/14: 12V Synchronous Buck Regulators


The ISL850xx sync buck regulators support input voltages of 3.8V to 18V and wide output current range, offering designers a complete portfolio of devices with high efficiency and reliable performance. The pin compatible regulators integrate very low RDS(ON) high side and low side MOSFETs that reduce external component count and power loss to extend product life. Both FETs also provide current limit and reverse current limit to boost reliability and protect the system during an overcurrent event. The high efficiency ISL850xx devices enable lower die temperatures, allowing systems to operate without cooling fans or heatsinks. Their internal compensation eliminates additional external components, which reduce design complexity and bill of materials (BOM) cost.

• 3.8V to 18V input voltage range
• Adjustable output voltage from 0.6V
• 300kHz or 600kHz selectable switching frequency
• External sync up to 1MHz
• Integrated bootstrap diode with under-voltage detection
• Selectable overcurrent protection (OCP) schemes including hiccup and latch-off
• Up to 9A, 12A and 14A output current
• Pre-bias start-up with internal 3ms soft start
• Peak current mode control with thermally compensated current limit
• Full protection includes input/output over-voltage
• 3.5 x 3.5mm, 15-L TQFN package
• 1k MSRP: $1.50 to $2.35