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XRP7713 Datasheet(PDF) 6 Page - Exar Corporation

Part # XRP7713
Description  Three Channel Digital PWM Step Down Controller
Download  29 Pages
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Manufacturer  EXAR [Exar Corporation]
Direct Link  http://www.exar.com
Logo EXAR - Exar Corporation

XRP7713 Datasheet(HTML) 6 Page - Exar Corporation

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XR
RP
P7
77
71
13
3
T
Th
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Ch
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Diig
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Stteep
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© 2010 Exar Corporation
6/29
Rev. 1.1.1
PIN ASSIGNMENT
24
23
21
22
19
18
17
1
2
3
4
5
6
7
8
20
DVDD
GPIO1
GPIO2
GPIO3
GPIO4
GPIO5
ENABLE
GL2
LX2
GH2
BST2
VCCD
BST3
BST1
PGND2
DGND
Exposed Pad: AGND
XRP7713
TQFN
5mm x 5mm
Fig. 3: XRP7713 Pin Assignment
PIN DESCRIPTION
Name
Pin Number
Description
VIN
30
Power source for the internal linear regulators to generate VCCA, VDD and the Standby LDO
(LDOOUT). Place a decoupling capacitor close to the controller IC. Also used in UVLO1 fault
generation – if VIN falls below the user programmed limit, all channels are shut down. The
VCCA
29
Output of the internal 5V LDO. This voltage is internally used to power analog blocks. This pin
should be bypassed with a minimum of 4.7uF to AGND
VCCD
18
Gate Drive input voltage. This is not an output voltage. This pin can be connected to VCCA to
provide power for the Gate Drive. VCCD should be connected to VCCA with the shortest
possible trace and decouple with a minimum 1µF capacitor. Alternatively, VCCD could be
connected to an external supply (not greater than 5V).
PGND13
28, 23,13
Power Ground. Ground connection for the low side gate driver. Connect at low side FET source.
AVDD
32
Output of the internal 1.8V LDO. This pin should be bypassed with a minimum of 2.2uF to
DGND
DVDD
1
Input for powering the internal digital logic. This pin should be connected to AVDD.
DGND
8
Digital Ground. Connect this pin to the ground plane at the exposed pad with a separate trace.
AGND
9
Analog Ground. Connect this pin to the ground plane at the exposed pad with a separate trace


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