XRP7714_11 Datasheet, PDF (7/29 Pages) Exar Corporation – Quad Channel Digital PWM Step Down Controller

XRP7714
Quad Channel Digital PWM Step Down Controller
Name Pin Number
Description
GL1-GL4
35,30,17,22
Output pin of the low side gate driver. Connect directly to the respective gate of an external N-
channel MOSFET.
GH1-GH4
33,28,19,24
Output pin of the high side gate driver. Connect directly to the respective gate of an external N-
channel MOSFET.
LX1-LX4
Lower supply rail for the high-side gate driver (GHx). Connect this pin to the switching node at
34,29,18,23
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.
High side driver supply pin(s). Connect BST to an external boost diode and a capacitor as
BST1-BST4 32,27,20,25 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
I²C serial interface communication pins. These pins can be re-programmed to perform GPIO
functions in applications when I²C bus is not used.
VOUT14 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. This pin should be
bypassed with a minimum of 2.2uF.
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
Junction Temp
Range
Marking
XRP7714ILB- F
-40°C≤TJ≤+125°C
XRP7714ILB
YYWW X
XRP7714ILBTR-F
-40°C≤TJ≤+125°C
XRP7714ILB
YYWW X
XRP7714ILB
XRP7714ILB-0X10-F
-40°C≤TJ≤+125°C
YYWW X
0X10
XRP7714ILB
XRP7714ILBTR-0X10-F -40°C≤T_J≤+125°C
YYWW X
0X10
XRP7714ILB
XRP7714ILB-0X14-F
-40°C≤TJ≤+125°C
YYWW X
0X14
XRP7714ILB
XRP7714ILBTR-0X14-F -40°C≤T_J≤+125°C
YYWW X
0X14
XRP7714ILB
XRP7714ILB-0X18-F
-40°C≤TJ≤+125°C
YYWW X
0X18
XRP7714ILB
XRP7714ILBTR-0X18-F -40°C≤T_J≤+125°C
YYWW X
0X18
XRP7714ILB
XRP7714ILB-0X1C-F
-40°C≤TJ≤+125°C
YYWW X
0X1C
XRP7714ILB
XRP7714ILBTR-0X1C-F -40°C≤T_J≤+125°C
YYWW X
0X1C
XRP7714EVB
XRP7714 Evaluation Board
“YY” = Year – “WW” = Work Week – “X” = Lot Number
Package
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
40-pin TQFN
Packing
Quantity
Note 1
Default I²C
Address
Bulk
Halogen Free
3K/Tape & Reel Halogen Free
Bulk
Halogen Free
0X10
3K/Tape & Reel Halogen Free
0X10
Bulk
Halogen Free
0X14
3K/Tape & Reel Halogen Free
0X14
Bulk
Halogen Free
0X18
3K/Tape & Reel Halogen Free
0X18
Bulk
Halogen Free
0X1C
3K/Tape & Reel Halogen Free
0X1C
© 2011 Exar Corporation
7/29
Rev. 1.1.6