SC486 Ver la hoja de datos (PDF) - Semtech Corporation

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Fabricante

SC486

Complete DDR1/2/3 Memory Power Supply

Semtech Corporation 

SC486

POWER MANAGEMENT

Pin Descriptions (Cont)

14,15

VTT

Output of the linear regulator. Decouple with two (minimum) 10µF ceramic capacitors to PGND2,

locating them directly across pins 14, 15, 16, and 17.

16,17 PGND2 Power ground for VTT output. Connect to thermal pad and ground plane.

18

PGND1 Power ground for VDDQ output. Connect to thermal pad and ground plane.

19

DL

Gate drive output for the low side MOSFET switch.

20

VDDP +5V supply voltage input for the VDDQ gate drivers.

21

ILIM

Current limit input pin. Connect to drain of low-side MOSFET for RDS(on) sensing or the source

for resistor sensing through a threshold sensing resistor.

22

LX

Phase node - the junction between the top and bottom FETs and the output inductor.

23

DH

Gate drive output for the high side MOSFET switch.

24

BST Boost capacitor connection for the high side gate drive.

- THERMAL Pad for heatsinking purposes. Connect to ground plane using multiple vias. Not connected

PAD internally.

Marking Information

Top View

Part Number

yyww = Date Code (Example: 0012)

xxxxx = Semtech Lot No. (Example: E9010

xxx

1-1)

 2006 Semtech Corp.

7

www.semtech.com

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