ISL85033CRSHEVAL1Z データシートの表示（PDF） - Renesas Electronics

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ISL85033CRSHEVAL1Z

Wide VIN Dual Standard Buck Regulator With 3A/3A Continuous Output Current

Renesas Electronics 

ISL85033

Pin Descriptions (Continued)

PIN NUMBER

23

24

25

26

27

22, 28

SYMBOL

SYNCOUT

SYNCIN

SGND

NC

FS

PGOOD2, PGOOD1

PD

PIN DESCRIPTION

Synchronization output. Provides a signal that is the inverse of the SYNCIN signal.

Connect to an external signal for synchronization from 300kHz to 2MHz (negative edge trigger). SYNCIN is

not allowed to be floating.

When SYNCIN = logic 0, PHASE1 and PHASE2 are running at 180° out-of-phase.

When SYNCIN = logic 1, PHASE1 and PHASE2 are running at 0° in-phase.

When SYNCIN = an external clock, PHASE1 and PHASE2 are running at 180° out-of-phase.

External SYNC frequency applied to the SYNCIN pin should be at least 2.4 x the internal switching frequency

setting.

Signal ground connections. The exposed pad must be connected to SGND and soldered to the PCB. All

voltage levels are measured with respect to this pin.

This is a no connection pin.

Frequency selection pin. Tie to VCC for 500kHz switching frequency. Connect a resistor to GND for

adjustable frequency from 300kHz to 2MHz.

Open-drain power-good output that is pulled to ground when the output voltage is below regulation limits or

during the soft-start interval. There is an internal 5MΩ internal pull-up resistor.

The exposed pad must be connected to the system GND plane with as many vias as possible for proper

electrical and thermal performance.

FN6676 Rev 8.00

February 17, 2015

Page 4 of 26

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