XRP6141_17 Datasheet, PDF (4/14 Pages) Exar Corporation – 35A Synchronous Step Down COT Controller

XRP6141
35A Synchronous Step Down COT Controller
BLOCK DIAGRAM
VCC
TON
VIN
PGOOD
SS
FB
EN/Mode
Enable LDO
LD O
VCC UVLO
4.25 V
+
-
VCC
OT P
TJ
+
150 C
-
Switching
Enabled
FB
0.6V
Switching
Enabled
10uA
+
-
0.6 V
PGOOD comparator
+
0.555 V
-
Short-circuit detection
0.36 V
+
-
1.9 V
Enable LDO
Enable LDO
+
-
Forced CCM or DCM/CCM
+
3V
-
Zero Cross Detect
SW
+
-1 mV
-
Current
emulation & VIN
DC correction
On-Time
Feedback
comparator
+
-
Switching
Enabled
RQ
SQ
RQ
SQ
TON
Minimum
On Time
Dead
Time
Control
Enable
Hiccup
Hiccup
Mode
If 8 consecutive ZCD
Then DCM
If 1 non-ZCD
Then exit DCM
If four
consecutive OCP
50uA
OC P
comparator
VCC
VCC
BST
GH
SW
GL
PIN ASSIGNMENT
AGND ILIM
Fig. 2: XRP6141 Block Diagram
PGND
© 2015 Exar Corporation
Fig. 3: XRP6141 Pin Assignment
4/14
XRP6141_DS_112315_Rev.2.0.1