XRP7659EVB Exar, XRP7659EVB Datasheet - Page 2

• Manufacturer Part Number: XRP7659EVB
• Description: Power Management IC Development Tools EVAL XRP7659
• Manufacturer: Exar
• Type: DC/DC Converters, Regulators & Controllersr

Specifications of XRP7659EVB

• Rohs: yes
• Product: Evaluation Boards
• Tool Is For Evaluation Of: XRP7659
• Input Voltage: 4.5 V to 18 V
• Output Voltage: 3.3 V
• Output Current: 1.5 A

PIN ASSIGNMENT
PIN DESCRIPTION
ORDERING INFORMATION
Refer to XRP7659’s datasheet and/or
USING THE EVALUATION BOARD
S
The evaluation board is configured to operate
under
parameters:
 Input voltage range:
 Output voltage range:
 Output current/load range:
I
Set the input supply to 12V and connect it to
VIN and GND connectors on the left side of the
evaluation board. Connect the load to the
VOUT and GND connectors on the right side of
the board. Check to make sure that jumper J1
© 2012 Exar Corporation
NITIAL
TANDARD
Name
GND
SW
BS
EN
FB
IN
S
the
ETUP
C
ONFIGURATION
Pin Number
following
1
2
3
4
5
6
1
1
.
.
5
5
A
A
Bootstrap pin.
Connect a 10nF bootstrap capacitor between BS and SW pins. The voltage across the
bootstrap capacitor drives the internal high-side MOSFET.
Ground pin.
Feedback pin.
Connect to a resistor divider to program the output voltage. If V
OVP is triggered. If V
Enable Input Pin.
Forcing this pin above 1.5V enables the IC. Forcing the pin below 0.4V shuts down the
IC. For automatic enable connect a 100kΩ resistor between EN and IN.
Power Input Pin.
Must be closely decoupled to GND pin with a 10µF/25V or greater ceramic capacitor.
Power switch output pin.
Connect to inductor and bootstrap capacitor.
conditions
1
1
8
8
4.5V - 18V
3.3V
0 – 1.5A
V
V
1
1
Fig. 2: XRP7659 Pin Assignment
www.exar.com
.
.
4
4
M
M
H
H
and
z
z
FB
n
n
drops below 0.25V the short circuit protection is activated.
2/5
o
o
n
n
-
-
is set to the left side (position marked
EN=VIN). The board will
regulate the output at 3.3V upon turning on
the input supply. The XRP7659 will operate
with a load current of up to 1.5A and should
provide nominal efficiency equal to figure 4 of
the datasheet.
J
Jumper J1 can be used to either connect EN to
VIN or allow an independent logic-level control
signal to be applied to EN. The board is
supplied from EXAR with jumper J1 set at left-
side (position marked EN=VIN). This allows for
automatic startup of the XRP7659 regulator
when VIN is applied.
S
S
for exact and up to date ordering information.
UMPER
y
y
n
n
c
c
Description
h
h
r
r
J1 F
o
o
n
n
o
o
UNCTION
u
u
s
s
S
S
t
t
e
e
p
p
-
-
D
D
FB
o
o
w
w
exceeds 0.972V the
power up and
n
n
X
X
C
C
R
R
o
o
P
P
n
n
Rev. 1.0.0
v
7
v
7
e
e
6
6
r
r
5
5
t
t
e
e
9
9
r
r