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April 2011 Rev. 1.0.0
Exar Corporation www.exar.com
48720 Kato Road, Fremont CA 94538, USA Tel. +1 510 668-7000 – Fax. +1 510 668-7001
GENERAL DESCRIPTION
The XRP7714EVB-DEMO-1, XRP7714EVB-
DEMO-2, and the XRP7714-DEMO-2P Demo
boards are complete, working, four channel,
power systems measuring either 2” x 2”, or 2”
by 2.5” capable of producing over 35 watts.
They provide 3.3V, 2.5V 1.8V and 1V at a
maximum of 4 amps per channel. The 2.5V,
1.8V and 1V supplies can be adjusted in 50mV
increments, and the 3.3V supply is adjustable
in 100mV increments. The order and ramp
rates for each supply can be programmed to
accommodate any sequencing requirement. All
power supply operations can be controlled
over an I
2
C interface. Faults, output voltages
and currents can also be monitored. Four
GPIO signals are available and can be
programmed to provide status of power good
signals enables and faults. Unused GPIO pins
can be programmed as I/O expansion for a
microcontroller. The board is supported by
PowerArchitect
TM
and plugs directly onto the
Exar Communications Module (XRP77xxEVB-
XCM).
E
EV
VA
AL
LU
UA
AT
TI
IO
ON
N
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AN
NU
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AL
L
XRP7714EVB-DEMO-1 XRP7714EVB-DEMO-2/2P
FEATURES
XRP7714 Programmable Controller
4 Channel Power System
Wide Input Voltage Range: 4.5V-25V
Over 35W Capable
Small Form Factor: 2.0” x 2.0”
I
2
C Interface
Programming
Monitoring
Control
EVALUATION BOARD
Fig. 1: XRP7713EVB-DEMO-1 Schematic
AVDD
1
DVDD
2
GPIO0
3
GPIO1
4
GPIO2
5
GPIO3
6
GPIO4
7
GPIO5
8
ENABLE
9
DGND
10
AGND
11
VOUT1
12
VOUT2
13
VOUT3
14
VOUT4
15
PGND3
16
GL3 17
LX3 18
GH3 19
BST3 20
PGND4 21
GL 4 22
LX4 23
GH4 24
BST4 25
VCC D 26
BST2 27
GH2 28
LX2 29
GL 2 30
PGND2
31
BST1
32
GH1
33
LX1
34
GL1
35
PGND1
36
VCCA
37
VIN2
38
VIN1
39
LDO
40
U1
XRP7714
VIN
VIN
C16
.1uF 50V
C3
2.2uF 10V
LDO
C1
10uF 35V
VCCA
VCC D
C17
2.2uF 10V
C18
2.2uF 10V
VCCA VCCD
C13
.1uF 50V
1
2
3
4
5
6
7
8
9
10
CON5
CON5
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4_ SDA
GPIO5_SCL
ENABLE
GPIO4_ SDA
GPIO5_ SCL
R15
100K
C28
.01uF 50V
FB_VOUT1
VOUT2_1.8V
VOUT3_2.5V
VOUT4_1V
C41
1000pF 50V
C40
1000pF 50V
C29
1000pF 50V
C39
1000pF 50V
C6
10uF 35V
L1
4.9uH
C12
.1uF 50V
C11
47uF 10V
C10
47uF 16V
PGND1
GL1
LX1
GH1
BST1
PGND2
PGND3
GL3
LX3
GH3
BS T3
PGND4
GL 4
LX4
GH4
BST4
BST2
GH2
LX2
GL 2
R3
4.99
R4
4.99
VIN1
LX1
GH1
GL 1
VOUT1_3.3V
R5
4.99
C9
1000pF 50V
C8
.01uF 50V
SD101AWS
PGND1
R6
0.00
R7
DNP
FB_VOUT 1
C20
10uF 35V
Q2B
FDS898 4
Q2A
FDS8984
L2
3.3uH
C27
.1uF 50V
C26
150uF 10V
C25
47uF 16V
R10
4.99
R11
4.99
VIN1
LX2
GH2
GL 2
VOUT2_1.8V
R12
4.99
C24
1000pF 50V
C23
.01uF 50V
D2
SD101AWS
BST2 VCC D
PGND2
C31
10uF 35V
Q3B
FDS898 4
Q3A
FDS8984
L3
4.9uH
C38
.1uF 50V
C37
47uF 10V
C36
47uF 16V
R18
4.99
R19
4.99
VIN1
LX3
GH3
GL 3
VOUT3_2.5V
R20
4.99
C35
1000pF 50V
C33
.01uF 50V
D3
SD101AWS
BST3 VCC D
PGND3
C43
10uF 35V
Q4B
FDS898 4
Q4A
FDS8984
L4
2.0uH
C47
.1uF 50V
C45
330uF 4V
C46
47uF 16V
R23
4.99
R24
4.99
VIN1
LX4
GH4
GL 4
VOUT 4 _1V
R25
4.99
C44
1000pF 50V
C34
.01uF 50V
D4
SD101AWS
BST4 VCC D
PGND4
LDO
CON11
MT G HOL E
CON12
MT G H OL E
CON1 0
MT G HOL E
CON9
MT G HOL E
R28
0.00
VIN
VCC A
1
2
3
CON4
CON4
GPIO4_ SDA
GPIO5_SCL
GND
CSD1
CSD1
VIN1
CSD1
TIP4
CSD1
VIN1
R2
0
C2
470uF 35V
TIP5
CSD1
TIP6
CSD1
VOUT 1
CSD1
TIP8
CSD1
VOUT 2
CSD1
TIP10
CSD1
TIP11
CSD1
TIP14
CSD1
VOUT 4
CSD1
TIP13
CSD1
VOUT1_3.3V
VOUT2_1.8V
VOUT3_2.5V
VOUT4_1V
VIN1
R1
4.99
ENABLE
GPIO0
CSD1
GPIO1
CSD1
GPIO2
CSD1
GPIO3
CSD1
R13
0
2
3
1
CON3
Q1A
FDS898 4
Q1B
FDS8984
GPIO0
GPIO1
GPIO2
GPIO3
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© 2011 Exar Corporation 2/16 Rev. 1.0.0
PIN ASSIGNMENT
Fig. 2: XRP7714 Pin Assignment
Pin Description
Name Pin Number Description
VIN1 39
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 VIN1 falls below the user programmed limit, all channels are
shut down. The VIN1 pin needs to be tied to VIN2 on the board with a short trace.
VIN2 38 If the Vin2 pin voltage falls below the user programmed UVLO VIN2 level all channels are
shut down. The VIN2 pin needs to be tied to VIN1 on the board with a short trace.
VCCA 37 Output of the internal 5V LDO. This voltage is internally used to power analog blocks. Note
that a compensation capacitor should be used on this pin (see application note).
VCCD 26
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).
PGND14 36,31,16,21 Power Ground. Ground connection for the low side gate driver. Connect at low side FET
source.
AVDD 1 Output of the internal 1.8V LDO. A decoupling capacitor should be placed between AVDD
and AGND close to the chip (with short traces).
DVDD 2 Input for powering the internal digital logic. This pin should be connected to AVDD.
DGND 10 Digital Ground. Connect this pin to the ground plane at the exposed pad with a separate
trace.
AGND 11 Analog Ground. Connect this pin to the ground plane at the exposed pad with a separate
trace
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.
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© 2011 Exar Corporation 3/16 Rev. 1.0.0
Name Pin Number Description
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 34,29,18,23
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 I2C serial interface communication pins. These pins can be re-programmed to perform
GPIO functions in applications when I2C bus is not used.
VOUT14 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
Refer to XRP7714’s datasheet and/or www.exar.com for exact and up to date ordering information.
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© 2011 Exar Corporation 4/16 Rev. 1.0.0
USING THE EVALUATION BOARD
INPUT VOLTAGE CONFIGURATION
The XRP7714EVB-DEMO-1 Board has several
different input voltage options. The Input
voltage components are rated at 35V. The
power components have been optimized for a
12V input rail. When running the board at an
input voltage other than 12V, use
PowerArchitect
TM
to evaluate the system
performance.
Single Wide Range, Input Voltage Rail
Both the XRP7714EVB-DEMO-1 and the
XRP7714EVB-DEMO-2P ship from the factory
configured for a single wide range input. The
Input voltage range is from 5.5V to 25V.
Single 5V Voltage Rail
Installing a zero ohm resistor into position R28
connects VIN to VCCA. This allows operation
down to 4.5V, but restricts the maximum input
voltage to 5.5V.
Dual Voltage Rail Operation
The XRP7714EVB-DEMO-x boards can be
configured to operate from two separate rails.
The following modifications must be made:
Remove 0 ohm resistors R2 and R13
Connect power for the XRP7714 between
pins VIN and GND
Connect channel power between pins VIN1
and GND
I
2
C INTERFACE
The XRP77XX family of controllers employs a
standard I2C interface. Pull-ups for the I2C
signals are not included on the demo board. If
using the demo board with something other
than the XRP77xxEVB-XCM, verify that the
SDA and SCL lines are pulled up.
Channel Design and Limitations
Channel 1 is designed to provide an output
voltage from 3.3V to 5.0V. The default voltage
is 3.3V.
Channel 2 is designed to provide an output
voltage from 1.8V to 2.5V. The default voltage
is 2.5V.
Channel 3 is designed to provide an output
voltage from 1.5V to 1.8V. The default
voltage is 1.8V.
Channel 4 is designed to provide an output
voltage from .9 to 1.2V. The default voltage is
1.0V. The Tantalum output capacitor is has a
4V rating. If modifying the channel 3 design,
do not exceed four volts unless the C45 is
replaced.
ENABLE PIN
The ENABLE pin connects to an RC network
This delays turn on of the device. It is pulled
up to AVDD with a 100K resistor and to
ground through a .01uFd capacitor. It appears
on pin 9 of connector CON5. This pin can be
used to turn on or turn off the device.
BOARD DIFFERENCES
The XRP7714EVB-DEMO-1 board is 2” x 2” and
does not have the facility for a power
connector.
The XRP7714EVB-DEMO-2 board is 2” x 2.5”
and comes from the factory with wired for
Single 5V operation. The Power Jack has been
removed from the board. Supplying more than
5V to the board will damage the XRP7714.
The XRP7714EVB-DEMO-2P board is 2” x 2.5”
and comes from the factory wired for a single
wide range input. The P denotes that a power
connector is installed for connection to a
power supply of the customers choosing. The
Center lead of the input connector is positive.
Operating the Evaluation Board
Note: The XRP7714EVB-DEMO-2, is designed
to be powered from the USB voltage that is
supplied to from the host PC. No additional
power connections are required to
demonstrate basic board functionality. If
connecting the board to an external power
source, Caution, Do not exceed 5.5V on the
chip, or it will be damaged.
Make sure that the board is configured for the
power supply(s) that you are using. Refer to
the Input Voltage Configuration section if you
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© 2011 Exar Corporation 5/16 Rev. 1.0.0
require specific board modifications for your
application.
Apply Power to the board: Please refer to the
appropriate board connection diagram for your
specific evaluation board.
If using a single supply, Connect the input
supply between the VIN pin and the GND pin.
If using a dual supply, Connect the chip power
between VIN/VINP pin and GND, and connect
Power Vin between the VIN1 pin and GND.
Plug the PowerXR evaluation board on to the
XCM as shown below.
Insert the USB cable into the computer and
the XCM board.
Turn on the Power supply
Load the PowerArchitect
TM
software.
Select the XRP7714EVB configuration and
select create configuration..
You will be prompted for a filename by a
Create New File Dialog box. Navigate to a
location to save the configuration, enter a
filename and select Save.
Refer to the Exar PowerArchitectTM Quick
Start Guide for information on how to run the
software.
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© 2011 Exar Corporation 6/16 Rev. 1.0.0
EVALUATION BOARD CONNECTIONS: DEMO-2P
Figure 3:XRP7714EVB-DEMO-2P Board Connections
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© 2011 Exar Corporation 7/16 Rev. 1.0.0
EVALUATION BOARD CONNECTIONS: DEMO-2
Figure 4:XRP7714EVB-DEMO-2 Board Connections
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© 2011 Exar Corporation 8/16 Rev. 1.0.0
EVALUATION BOARD CONNECTIONS: DEMO-1
Figure 5:XRP7714EVB-DEMO-1 Board Connections
GND
Channel 2 Out
Channel 1 Out
GND
GND
GND
Channel 4 Out
Channel 3 Out
LDO OUT
GND
GND
CHIP VIN (VIN) POWER VIN (VINP) PGND
1
1
2
2
3
3
4
4
5
5
6
6
D D
C C
B B
A A
Title
Number RevisionSize
B
Date: 4/20/2011 Sheet of
File: C:\Users\..\XRP7714..Sch Drawn By:
AVDD
1
DVDD
2
GPIO0
3
GPIO1
4
GPIO2
5
GPIO3
6
GPIO4
7
GPIO5
8
ENABLE
9
DGND
10
AGND
11
VOUT1
12
VOUT2
13
VOUT3
14
VOUT4
15
PGND3
16
GL3
17
LX3
18
GH3
19
BST3
20
PGND4 21
GL4 22
LX4 23
GH4 24
BST4 25
VCCD 26
BST2 27
GH2 28
LX2 29
GL2 30
PGND2 31
BST1 32
GH1 33
LX1 34
GL1 35
PGND1 36
VCCA 37
VIN2 38
VIN1 39
LDO 40
U1
XRP7714
VIN
VIN
C16
.1uF 50V
C3
2.2uF 10V
LDO
C1
10uF 35V
VCCA
VCCD
C17
2.2uF 10V
C18
2.2uF 10V
VCCA VCCD
C13
.1uF 50V
1
2
3
4
5
6
7
8
9
10
CON5
CON5
GPIO0
GPIO1
GPIO2
GPIO3
GPIO4_SDA
GPIO5_SCL
ENABLE
GPIO4_SDA
GPIO5_SCL
R15
100K
C28
.01uF 50V
FB_VOUT1
VOUT2_1.8V
VOUT3_2.5V
VOUT4_1V
C41
1000pF 50V
C40
1000pF 50V
C29
1000pF 50V
C39
1000pF 50V
C6
10uF 35V
L1
4.9uH
C12
.1uF 50V
C11
47uF 10V
C10
47uF 16V
PGND1
GL1
LX1
GH1
BST1
PGND2
PGND3
GL3
LX3
GH3
BST3
PGND4
GL4
LX4
GH4
BST4
BST2
GH2
LX2
GL2
R3
4.99
R4
4.99
VIN1
LX1
GH1
GL1
VOUT1_3.3V
R5
4.99
C9
1000pF 50V
C8
.01uF 50V
D1
SD101AWS
BST1 VCCD
PGND1
R6
0.00
R7
DNP
FB_VOUT1
C20
10uF 35V
Q2B
FDS8984
Q2A
FDS8984
L2
3.3uH
C27
.1uF 50V
C26
150uF 10V
C25
47uF 16V
R10
4.99
R11
4.99
VIN1
LX2
GH2
GL2
VOUT2_1.8V
R12
4.99
C24
1000pF 50V
C23
.01uF 50V
D2
SD101AWS
BST2 VCCD
PGND2
C31
10uF 35V
Q3B
FDS8984
Q3A
FDS8984
L3
4.9uH
C38
.1uF 50V
C37
47uF 10V
C36
47uF 16V
R18
4.99
R19
4.99
VIN1
LX3
GH3
GL3
VOUT3_2.5V
R20
4.99
C35
1000pF 50V
C33
.01uF 50V
D3
SD101AWS
BST3 VCCD
PGND3
C43
10uF 35V
Q4B
FDS8984
Q4A
FDS8984
L4
2.0uH
C47
.1uF 50V
C45
330uF 4V
C46
47uF 16V
R23
4.99
R24
4.99
VIN1
LX4
GH4
GL4
VOUT4_1V
R25
4.99
C44
1000pF 50V
C34
.01uF 50V
D4
SD101AWS
BST4 VCCD
PGND4
LDO
CON11
MTG HOLE
CON12
MTG HOLE
CON10
MTG HOLE
CON9
MTG HOLE
R28
0.00
VIN
VCCA
1
2
3
CON4
CON4
GPIO4_SDA
GPIO5_SCL
GND
CSD1
VIN
CSD1
VIN1
CSD1
TIP4
CSD1
VIN1
R2
0
C2
470uF 35V
TIP5
CSD1
TIP6
CSD1
VOUT1
CSD1
TIP8
CSD1
VOUT2
CSD1
TIP10
CSD1
TIP11
CSD1
TIP14
CSD1
VOUT4
CSD1
TIP13
CSD1
VOUT1_3.3V
VOUT2_1.8V
VOUT3_2.5V
VOUT4_1V
VIN1
R1
4.99
ENABLE
GPIO0
CSD1
GPIO1
CSD1
GPIO2
CSD1
GPIO3
CSD1
R13
0
2
3
1
CON3
Q1A
FDS8984
Q1B
FDS8984
GPIO0
GPIO1
GPIO2
GPIO3
XRP7714EVB-DEMO-XX
1.0
11
X
XR
RP
P7
77
71
14
4E
EV
VB
B-
-D
DE
EM
MO
O-
-
X
X
F
Fo
ou
ur
r
C
Ch
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an
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ne
el
l
D
Di
ig
gi
it
ta
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P
PW
WM
M
D
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mo
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Bo
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© 2011 Exar Corporation 10/16 Rev. 1.0.0
BILL OF MATERIAL
Ref. Qty
Manufacturer
Part Number Size Description
C1, C6, C20, C31, C43 5 Murata GRM32ER6YA106KA12L C1210
Cap, Ceramic 10uF 35V
X7R 1210
C2 1 United Chemi-
Con EKZE350ELL471MJ20S RB2/4
Cap, Aluminum, 470uF
35V LOW ESR
C3, C17, C18 3 Murata GRM21BR71A225KA01L C0805
Cap, Ceramic 2.2uF 10V
X7R 0805
C8, C23, C28, C33, C34 5 Murata GRM188R71H103KA01D C0603
Cap, Ceramic .01uF 50V
X7R 0603
C9, C24, C29, C35,
C39, C40, C41, C44 8 Murata GRM188R71H102KA01D C0603
Cap, Ceramic 1000pF 50V
X7R 0603
C10, C25, C36, C46 4 Murata GRM32ER71A476KE15L C1210
Cap, Ceramic 47uF 16V
X7R 1210
C11, C37 2 AVX TCJB476M010R0070 C1210
Cap, Tantalum 47uF 10V
LOW_ESR, CASE A
C12, C13, C16, C27,
C38, C47 6 Murata GRM21BR71H104KA01L C0603
Cap, Ceramic .1uF 50V
X7R 0603
C26 1 AVX T520B157M006ATE070 C1210
Cap, Tantalum 150uF 10V
LOW_ESR, CASE A
C45 1 AVX T520B337M2R5ATE045 C1210
Cap, Tantalum 330uF 4V
LOW_ESR, CASE A
CON3 1 Switchcraft RAPC722X JACK-
RAPC722X
CONN POWERJACK MINI
.08" R/A T/H
CON4 1 Wurth
Electronik 61304011121 SIP3 CONNECTOR .1 CTR 3 pin
CON5 1 Wurth
Electronik 613 010 218 21 HDR2X5F-
TOP
CONN Header 5x2, 0.1
inch
D1, D2, D3, D4 4 Diodes Inc SD101CWS-7-F SOD-323
Diode, Schottky, 40V
400mW SOD-323
GND, TIP4, TIP5, TIP6,
TIP8, TIP10, TIP11,
TIP13, TIP14, VIN,
VIN1, VOUT1, VOUT2,
VOUT4
14 Keystone 1562-2 PAD-HOLE Test Points
GPIO0, GPIO1, GPIO2,
GPIO3 4 Keystone 1528-2 SIP1
L1, L3 2 Wurth 744314490 744310X
Inductor, Shielded 4.9uH
6.5A 17mOhm
L2 1 Wurth 744311330 744310X
Inductor, Shielded 3.3uH
6.5A 17.2mOhm
L4 1 Wurth 744310200 744310X
Inductor, Shielded, 2.0uH
6.5A 14.2mOhm
Q1, Q2, Q3, Q4 4 Fairchild FDS8984 SO-MOS-8B FDS8984
R1, R3, R4, R10, R11,
R18, R19, R23, R24 9 Vishay/Dale CRCW06034R99FKEA 0603 Resistor, 4.99 .1W 0603
R2, R13 2 Vishay/Dale CRCW12060000Z0EA 1206 Resistor 0.00 .25W 1206
R5, R12, R20, R25 4 Vishay/Dale CRCW08054R99FKEA 0805 Resistor, 4.99 .1W 0805
R6 1 Vishay/Dale CRCW02010000Z0ED 0603 Resistor, 0.00 .1W 0603
R15 1 Vishay/Dale CRCW0603100KFKEA 0603
Resistor, .100K 1W 0603
U1 1 Exar Corporation XRP7714ILB-F QFN40
4 Channel 25 V PWM Step
Down DC-DC Controller
QFN-40
X
XR
RP
P7
77
71
14
4E
EV
VB
B-
-D
DE
EM
MO
O-
-
X
X
F
Fo
ou
ur
r
C
Ch
ha
an
nn
ne
el
l
D
Di
ig
gi
it
ta
al
l
P
PW
WM
M
D
De
em
mo
o
B
Bo
oa
ar
rd
d
s
s
© 2011 Exar Corporation 11/16 Rev. 1.0.0
EVALUATION BOARD LAYOUT
Fig. 3: Component Placement – Top Side
Fig. 4: Component Placement – Bottom Side
X
XR
RP
P7
77
71
14
4E
EV
VB
B-
-D
DE
EM
MO
O-
-
X
X
F
Fo
ou
ur
r
C
Ch
ha
an
nn
ne
el
l
D
Di
ig
gi
it
ta
al
l
P
PW
WM
M
D
De
em
mo
o
B
Bo
oa
ar
rd
d
s
s
© 2011 Exar Corporation 12/16 Rev. 1.0.0
Fig. 5: Layout – Top Side
Fig. 6: Layout – Bottom
X
XR
RP
P7
77
71
14
4E
EV
VB
B-
-D
DE
EM
MO
O-
-
X
X
F
Fo
ou
ur
r
C
Ch
ha
an
nn
ne
el
l
D
Di
ig
gi
it
ta
al
l
P
PW
WM
M
D
De
em
mo
o
B
Bo
oa
ar
rd
d
s
s
© 2011 Exar Corporation 13/16 Rev. 1.0.0
Fig. 7: Layout – Internal Plane
Fig. 8: Layout – Internal Plane
X
XR
RP
P7
77
71
14
4E
EV
VB
B-
-D
DE
EM
MO
O-
-
X
X
F
Fo
ou
ur
r
C
Ch
ha
an
nn
ne
el
l
D
Di
ig
gi
it
ta
al
l
P
PW
WM
M
D
De
em
mo
o
B
Bo
oa
ar
rd
d
s
s
© 2011 Exar Corporation 14/16 Rev. 1.0.0
EVALUATION BOARD EFFICIENCY PERFORMANCE
Fig. 9: All Channels Efficiency
Fig. 10: 3.3V Efficiency
Fig. 11: 2.5V Efficiency
Fig. 12: 1.8V Efficiency
Fig.13: 1V Efficiency
Fig. 14: Layout – Internal Plane
X
XR
RP
P7
77
71
14
4E
EV
VB
B-
-D
DE
EM
MO
O-
-
X
X
F
Fo
ou
ur
r
C
Ch
ha
an
nn
ne
el
l
D
Di
ig
gi
it
ta
al
l
P
PW
WM
M
D
De
em
mo
o
B
Bo
oa
ar
rd
d
s
s
© 2011 Exar Corporation 15/16 Rev. 1.0.0
EVALUATION BOARD LINE LOAD REGULATION PERFORMANCE
Fig. 14: Line Load Regulation 3.3V
Fig. 15: Line Load Regulation 2.5V
Fig. 16: Line Load Regulation 1.8V
Fig. 17: Line Load Regulation 1.0V
Fig.18: 1V Efficiency
Fig. 14: Layout – Internal Plane
X
XR
RP
P7
77
71
14
4E
EV
VB
B-
-D
DE
EM
MO
O-
-
X
X
F
Fo
ou
ur
r
C
Ch
ha
an
nn
ne
el
l
D
Di
ig
gi
it
ta
al
l
P
PW
WM
M
D
De
em
mo
o
B
Bo
oa
ar
rd
d
s
s
© 2011 Exar Corporation 16/16 Rev. 1.0.0
Document Revision History
Revision Date Description
1.0.0 04/15/2011 Initial release of document
BOARD REVISION HISTORY
Board Revision
Date Description
REV2.0 01/03/2011 Initial release of evaluation boards 2 and 2P.
REV2.0 12/23/2010 Initial release of evaluation board 1. Note: Limited to a production of 150 units.
FOR FURTHER ASSISTANCE
Email: customersupport@exar.com
Exar Technical Documentation: http://www.exar.com/TechDoc/default.aspx?
E
XAR CORPORATION
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www.exar.com
NOTICE
EXAR Corporation reserves the right to make changes to the products contained in this publication in order to improve
design, performance or reliability. EXAR Corporation assumes no responsibility for the use of any circuits described herein,
conveys no license under any patent or other right, and makes no representation that the circuits are free of patent
infringement. Charts and schedules contained here in are only for illustration purposes and may vary depending upon a
user’s specific application. While the information in this publication has been carefully checked; no responsibility, however,
is assumed for inaccuracies.
EXAR Corporation does not recommend the use of any of its products in life support applications where the failure or
malfunction of the product can reasonably be expected to cause failure of the life support system or to significantly affect its
safety or effectiveness. Products are not authorized for use in such applications unless EXAR Corporation receives, in
writing, assurances to its satisfaction that: (a) the risk of injury or damage has been minimized; (b) the user assumes all
such risks; (c) potential liability of EXAR Corporation is adequately protected under the circumstances.
Reproduction, in part or whole, without the prior written consent of EXAR Corporation is prohibited.
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