XRP7714ILB-F Exar Corporation, XRP7714ILB-F Datasheet - Page 21

• Manufacturer Part Number: XRP7714ILB-F
• Description: IC CTRLR PWM/LDO STP-DWN 40TQFN
• Manufacturer: Exar Corporation
• Type: Step-Down (Buck)r

Specifications of XRP7714ILB-F

• Number Of Outputs: 4
• Package / Case: 40-WFQFN Exposed Pad
• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Voltage - Output: 0.9 ~ 5.1 V
• Frequency - Switching: 300kHz ~ 1.5MHz
• Voltage - Input: 4.75 ~ 25 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Switching Frequency: 300 KHz
• Operating Supply Voltage: 4.75 V to 25 V
• Supply Current: 28 mA to 50 mA
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 40 C
• Mounting Style: SMD/SMT
• Output Voltage: 0.9 V to 5.1 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 1016-1350 - EVAL BAORD FOR XRP77141016-1344 - IN-SOCKET PROG BRD VIA USB/GUI
• Current - Output: -
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 1016-1351

Two XRP7714s can be synchronized together. This Master-Slave configuration is described below.
When the XRP7714 powers up as a master unit after the internal configuration memory is loaded
the unit will send CLK_OUT and SYNC_OUT signals to the slave on the preconfigured GPIO pins.
When powering in sync mode the slave unit will initially power up with its internal clock to transfer
the configuration memory. Once this transfer occurs, then the unit is set to function as a slave unit.
In turn the unit will take the external clock provided by the master to run as its main internal clock.
When an external clock is used, the user will need to setup the master to also have an external
clock in function. All of the same rules apply as in the External clock synchronization, Synchronized
operation as a Slave unit section of this document.
either the external clock going to both Master/Slave CLK_IN, or CLK_IN can go to the Master, and
the Master can synchronize SYNC_OUT and CLK_OUT to the Slave.
© 2010 Exar Corporation
Synchronized Operation as a Master and Slave Unit
External Clock Synchronization Master Slave combination
•
•
Master
Slave
as a master
Fig. 27: Master/Slave Configuration of the XRP7714
Fig. 26:XRP7714 Configured For External Clock Use
configured
XRP7714
GPIO1
GPIO2
Q
Q
u
u
a
CLK_IN
a
CLK_OUT
d
SYNC_OUT
d
C
C
h
h
a
a
GPIO1
external clock use
21/27
n
n
Configured for
n
n
XRP7714
e
e
l
l
SYNC_IN
CLK_IN
D
D
There are two ways of synchronizing this,
i
i
g
g
i
i
t
t
a
a
GPIO2
GPIO1
l
l
configured
as a slave
P
P
XRP7714
W
W
M
M
S
S
t
t
e
e
p
p
D
D
o
o
w
w
n
n
X
X
C
C
R
R
o
o
n
P
n
P
Rev. 1.1.3
t
t
7
7
r
r
o
7
o
7
l
l
1
1
l
l
e
e
4
4
r
r