XRP6670 Datasheet, PDF (4/13 Pages) Exar Corporation – 3A 300kHz-2.5MHz Synchronous Step Down Regulator

XRP6670
3A 300kHz-2.5MHz Synchronous Step Down Regulator
PIN DESCRIPTION
Name
SHDN/RT
GND
SW
PGND
PVDD
VDD
PGOOD
FB
COMP
Exp. Pad
Pin Number
1
2
3, 4
5
6
7
8
9
10
Exp. Pad
Description
Shutdown and Oscillator resistor input.
Connect a resistor to GND from this pin to set the switching frequency. Forcing this pin
to VDD shuts down the device.
Signal ground.
All small-signal ground, such as the compensation components and exposed pad should
be connected to this, which in turn connects to PGND at one point.
Power switch output pin.
This pin is connected to the inductor.
Power Ground Signal.
Connect this signal as close as possible to the input and output capacitors CIN and COUT.
Power Input Supply Pin.
Decouple this pin to PGND (pin 5) with a capacitor.
Signal Input Supply Pin.
Decouple this pin to GND (pin 2) with a capacitor. Typically, VDD and PVDD are
connected together.
Power Good Flag.
This is an open drain output and is pulled to ground if the output voltage is out of
regulation.
Feedback pin.
An external resistor divider connected to FB programs the output voltage.
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.
Connect to GND signal (pin 2).
ORDERING INFORMATION
Part Number
XRP6670EHTR-F
XRP6670EVB
Junction
Temperature
Range
Marking
6670
-40°C≤TJ≤+125°C
YYWW
XXX
XRP6670 Evaluation Board
Package
Packing
Quantity
Note 1
DFN10
3K/Tape & Reel Halogen Free
“YY” = Year – “WW” = Work Week – “X” = Lot Number; when applicable.
Note 2
© 2013 Exar Corporation
4/13
Rev. 1.0.1