3

FN6482.0

February 26, 2008

Controller and Driver Recommendation

CONTROLLER

COMMENTS

ISL6334

When PSI# is asserted low, the remained channel transmits a special PWM protocol that can be recognized only by the dedicated

VR11.1 drivers ISL6622/ISL6620 for Diode Emulation (DCM) operation. The dropped channel remains in tri-state.

ISL6334A

When PSI# is asserted low, the remained channel transmits normal CCM PWM that can be recognized by any Intersil driver such

as ISL6612/ISL6614, ISL6596, ISL6610, and even ISL6622/ISL6620. The dropped channel remains in tri-state.

DRIVER

GATE

DRIVE

VOLTAGE

# OF

GATE

DRIVES

DIODE

EMULATION

(DE)

GATE DRIVE

DROP

(GVOT)

COMMENTS

ISL6622

12V

Dual

Yes

Yes

For PSI# channel and its coupled channel in coupled inductor

applications or all channels

ISL6622A,

ISL6622B

12V

Dual

Yes

No

For PSI# channel and its coupled channel in coupled inductor

applications or all channels.

ISL6620, ISL6620A

5V

Dual

Yes

No

For PSI# channel and its coupled channel in coupled inductor

applications or all channels

ISL6612, ISL6612A

12V

Dual

No

No

For dropped phases or all channels with ISL6634A

ISL6596

5V

Dual

No

No

For dropped phases or all channels with ISL6634A

ISL6614, ISL6614A

12V

Quad

No

No

For dropped phases or all channels with ISL6634A

ISL6610, ISL6610A

5V

Quad

No

No

For dropped phases or all channels with ISL6634A

NOTE: Note: Intersil 5V and 12V drivers are mostly pin-to-pin compatible and allow dual footprint layout to optimize MOSFET selection and efficiency.

Dual = One Synchronous Channel; Quad = Two Synchronous Channels.

ISL6334, ISL6334A