XRP6141 Datasheet, PDF (5/14 Pages) Exar Corporation – 35A Synchronous Step Down COT Controller

XRP6141
35A Synchronous Step Down COT Controller
PIN DESCRIPTION
Name
GL
NC
SW
GH
BST
ILIM
EN/MODE
TON
SS
PGOOD
FB
AGND
VIN
VCC
PGND
Exposed Pad
Pin Number
1
2
3
4
5
6
7
8
9
10
11
12, 13
14
15
16
Description
Driver output for Low-side N-channel synchronous MOSFET.
Internally not connected. Leave this pin floating.
Lower supply rail for high-side gate driver GH. Connect this pin to the junction between
the two external N-channel MOSFETs.
Driver output for high-side N-channel switching MOSFET.
High-side driver supply pin. Connect a 0.1uF bootstrap capacitor between BST and SW.
Over-current protection programming. Connect with a resistor to the Drain of the low-
side MOSFET.
Precision enable pin. Pulling this pin above 1.9V will turn the IC on and it will operate in
Forced CCM. If the voltage is raised above 3.0V then the IC will operate in DCM or CCM
depending on load.
Constant on-time programming pin. Connect with a resistor to AGND.
Soft-Start pin. Connect an external capacitor between SS and AGND to program the
soft-start rate based on the 10uA internal source current.
Power-good output. This open-drain output is pulled low when VOUT is outside the
regulation.
Feedback input to feedback comparator. Connect with a set of resistors to VOUT and
GND in order to program VOUT.
Analog ground. Control circuitry of the IC is referenced to this pin.
IC supply input. Provides power to internal LDO.
The output of LDO. For operation using a 5V rail, VCC should be shorted to VIN.
Low side driver ground
Thermal pad for heat dissipation. Connect to AGND with a short trace.
ORDERING INFORMATION
Part Number
Temperature
Range
Marking
XRP6141EL-F
XRP6141ELMTR-F
XRP6141ELTR-F
XRP6141EVB
-40°C≤TJ≤+125°C
6141
-40°C≤TJ≤+125°C
YWW
-40°C≤TJ≤+125°C
XXXX
XRP6141 Evaluation Board
Package
3x3mm
QFN16
Packing
Quantity
Note 1
Tray
250/Tape & Reel
Lead Free and/or
Halogen Free
3k/Tape & Reel
“Y” = Year – “WW” = Work Week – “X” = Lot Number; when applicable.
© 2015 Exar Corporation
5/14
Rev. 2.0.0