XRP7665IDBTR-F Exar Corporation, XRP7665IDBTR-F Datasheet - Page 4

• Manufacturer Part Number: XRP7665IDBTR-F
• Description: Current Mode PWM Controllers 3A 18V Synchronous Step Down Regulator
• Manufacturer: Exar Corporation

Specifications of XRP7665IDBTR-F

• Duty Cycle (max): 90 %
• Output Voltage: 0.925 V to 16 V
• Output Current: 3 A
• Mounting Style: SMD/SMT
• Package / Case: SOIC-8
• Switching Frequency: 340 KHz
• Operating Supply Voltage: 4.75 V to 18 V
• Supply Current: 0.1 uA
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

PIN DESCRIPTION
ORDERING INFORMATION
“YY” = Year – “WW” = Work Week – “X” = Lot Number; when applicable.
© 2011 Exar Corporation
XRP7665IDBTR-F
XRP7665EVB
Part Number
Name
COMP
GND
SW
BS
EN
SS
FB
IN
-
Pin Number
XRP7665 Evaluation Board
-40°C≤T
Temperature
EP
1
2
3
4
5
6
7
8
Range
A
≤+85°C
Bootstrap pin.
Connect a 0.01µF or greater bootstrap capacitor between the BS pin and the SW pin.
The voltage across the bootstrap capacitor drives the internal high-side power MOSFET.
Power input pin.
A capacitor should be connected between the IN pin and GND pin to keep the input
voltage constant.
Power switch output pin.
This pin is connected to the inductor and the bootstrap capacitor.
Ground signal pin.
Feedback pin.
An external resistor divider connected to FB programs the output voltage. If the
feedback pin exceeds 1.1V the over-voltage protection will trigger. If the feedback
voltage drops below 0.3V the oscillator frequency is lowered to achieve short-circuit
protection.
Compensation pin.
This is the output of transconductance error amplifier and the input to the current
comparator. It is used to compensate the control loop. Connect an RC network form
this pin to GND.
Control input pin.
Forcing this pin above 1.5V enables the IC. Forcing this pin below 0.5V shuts down the
IC. When the IC is in shutdown mode all functions are disabled to decrease the supply
current below 1µA.
Soft-start control input pin.
Connect a capacitor from SS to GND to set the soft-start period. A 0.1µF capacitor sets
the soft start period to 15ms. To disable the soft-start feature, leave SS unconnected.
Exposed Pad
Connect to GND through PCB.
XRP7665I
Marking
YYWWF
X
3
3
A
A
SOIC-8(EP) 2.5K/Tape & Reel
Package
1
1
4/12
8
8
V
V
S
S
y
y
n
n
c
c
Quantity
Description
h
Packing
h
r
r
o
o
n
n
o
o
u
u
s
s
RoHS Compliant
Halogen Free
S
S
t
t
e
e
Note 1
p
p
-
-
D
D
o
o
w
w
n
n
X
X
C
C
R
R
o
o
Note 2
P
n
P
n
Rev. 1.0.0
v
v
7
7
e
e
6
6
r
r
6
t
6
t
e
e
5
5
r
r