X

4

Q

© 2010 Exar Corporation

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Rev. 1.1.3

Name

Pin Number

Description

AGND

11

Analog Ground. This pin should be connected to the ground plane at the exposed pad

with a separate trace

GL1-GL4

17,22,30,35

Output pin of the low side gate driver. Connect directly to the respective gate of an

external N-channel MOSFET.

GH1-GH4

19,24,28,33

Output pin of the high side gate driver. Connect directly to the respective gate of an

external N-channel MOSFET.

LX1-LX4

34,29,23,18

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-BST4

32,27,20,25

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.

GPIO0-GPIO3

3,4,5,6

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

7,8

VOUT1-VOUT4

12,13,14,15

Voltage sense.

Connect to the output of the corresponding power stage.

LDOOUT

40

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

compensation capacitor should be used on this pin [see Application Note].

ENABLE

9

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

etc.). If pulled low for longer than 100us, the XRP7714 is placed into shutdown.

AGND

Exposed Pad

Analog Ground.

Connect to analog ground (as noted above for pin 11).

ORDERING INFORMATION

Part Number

Temperature Range

Marking

Package

Packing Quantity

Note 1

Note 2

XRP7714ILB- F

XRP7714ILB

YYWW X

40-pin TQFN

Bulk

Halogen Free

XRP7714ILBTR-F

XRP7714ILB

YYWW X

40-pin TQFN

3K/Tape & Reel

Halogen Free

XRP7714EVB

XRP7714 Evaluation Board

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