The ISL6534 is a versatile triple regulator that has two independent synchronous-rectified buck controllers with integrated 12V gate drivers (OUT1 and OUT2) and a linear controller (OUT3) to offer precision regulation of up to three voltage rails. An optional shunt regulator allows 12V only operation, when a 5V supply is not available.

Features

• Two Synchronous-Rectified Buck Controllers

- Voltage Mode control

- VIN range up to 12V

- VOUT range from 0.6V to 6V

- 12V LGATE drivers; up to 12V Boot Strap for UGATE

• Switcher References

- 0.6V Reference for OUT1 (0.8 Accurate)

- 3.3V Reference Output for OUT2 (0.8 Accurate)

- External Reference Input for OUT2

- Buffered VTT Reference Output

• Switcher clocking

- Phase options for Optimal Clock Relationship

- Resistor-Selectable Switching Frequency (300kHz default; Resistor to Ground for 300kHz to 1MHz range)

- Synchronization-Capable Switching Frequency (Connect FS_SYNC to Separate Regulator)

• Single Linear Controller

- Drives N-Channel MOSFET

- 0.6V Reference (0.8 Accurate)

- VIN range up to 12V

- VOUT range from 0.6V to 6V

• 12V and 5V supplies required (but optional shunt regulator can generate VCC = 5.8V from 12V)

• Three Independent Soft-Start/Enable Pins

- Gang Together or Control Independently

• PGOOD Output Indicates All Outputs Available

• Thermally Enhanced QFN or TSSOP Package

• QFN Package:

- Compliant to JEDEC PUB95 MO-220 QFN

- Quad Flat No Leads - Package Outline

- Near Chip Scale Package footprint, which improves PCB efficiency and has a thinner profile

• Pb-Free Available (RoHS Compliant)