3

FN6689.2

August 31, 2010

Controller and Driver Recommendation

CONTROLLER

COMMENTS

ISL6334B

When PSI# is asserted low, the operating channels send a special PWM protocol that can be recognized only by the dedicated

VR11.1 drivers ISL6622/ISL6620 for Diode Emulation (DCM) operation. The disabled channels remain in tri-state.

ISL6334C

When PSI# is asserted low, the operating channels send normal CCM PWM that can be recognized by any Intersil driver,

such as ISL6612/ISL6614, ISL6596, ISL6609, ISL6610, and even ISL6622/ISL6620. The disabled channels remain 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 ISL6334C

ISL6596, ISL6609

5V

Dual

No

No

For dropped phases or all channels with ISL6334C

ISL6614, ISL6614A

12V

Quad

No

No

For dropped phases or all channels with ISL6334C

ISL6610, ISL6610A

5V

Quad

No

No

For dropped phases or all channels with ISL6334C

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

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

ISL6334B, ISL6334C