XR76208EL-Q Datasheet, PDF (7/21 Pages) Exar Corporation – AEC-Q100 Qualified 40V PowerBloxTM 3A/5A/8A Synchronous Step Down COT Regulator

Functional Block Diagram
XR76203-Q/XR76205-Q/XR76208-Q
VCC
TON
VIN
PGOOD
SS
FB
EN/MODE
Enable LDO
LDO
VCC UVLO
4.25 V
+
-
VCC
TJ
150 C
OTP
+
-
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
+
-
CCM or CCM/DCM
+
3V
-
Zero Cross Detect
SW
+
-2 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
OCP
comparator _{+ -}
50uA
VCC
VCC
BST
PVIN
GH
SW
GL
AGND
ILIM
PGND
©2016-2017 Exar Corporation
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exar.com/XR76203-Q/XR76205-Q/XR76208-Q
Rev 1C