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3

T

© 2010 Exar Corporation

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Rev. 1.1.1

Name

Pin Number

Description

GL1-GL3

27, 22, 14 Output pin of the low side gate driver. Connect directly to the respective gate of an external N-

channel MOSFET.

GH1-GH3

25, 20, 16 Output pin of the high side gate driver. Connect directly to the respective gate of an external N-

channel MOSFET.

LX1-LX3

26, 21, 15

Lower supply rail for the high-side gate driver (GHx). Connect this pin to the switching node at

the junction between the two external power MOSFETs and the inductor. These pins are also

used to measure voltage drop across bottom MOSFETs in order to provide output current

information to the control engine.

BST1-BST3

24, 19, 17

High side driver supply pin(s). Connect BST to an external boost diode and a capacitor as

shown in the front page diagram. The high side driver is connected between the BST pin and LX

pin.

GPIO1-

GPIO3

2,3,4

These pins can be configured as inputs or outputs to implement custom flags, power good

signals and enable/disable controls. A GPIO pin can also be programmed as an input clock

synchronizing IC to external clock. Refer to the “GPIO Pins” Section and the “External Clock

Synchronization” Section for more information.

GPIO4_SDA,

GPIO5_SCL

5,6

VOUT14

10, 11, 12 Voltage sense. Connect to the output of the corresponding power stage.

LDOOUT

31

Output of the Standby LDO. It can be configured as a 5V or 3.3V output. This pin should be

bypassed with a minimum of 2.2uF.

ENABLE

7

If ENABLE is pulled high, the chip powers up (logic reset, registers configuration loaded, etc.).

If pulled low for longer than 100us, the XRP7713 is placed into shutdown.

AGND

Exposed Pad Analog Ground. Connect to analog ground (as noted above for pin 11).

ORDERING INFORMATION

Part Number

Junction Temp

Range

Marking

Package

Packing

Quantity

Note 1

Address

XRP7713ILB-F

YYWW X

32-pin TQFN

Bulk

Halogen Free

0x00

XRP7713ILBTR-F

YYWW X

32-pin TQFN

3K/Tape & Reel Halogen Free

0x00

XRP7713EVB

XRP7713 Evaluation Board

“YY” = Year – “WW” = Work Week – “X” = Lot Number