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| XR76201 Datasheet, PDF (10/16 Pages) Exar Corporation – 40V PowerBloxTM 1.5A Synchronous Step-Down COT Regulator | |||
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XR76201
Functional Block Diagram
VCC
TON
BST
PVIN
Enable LDO
VCC UVLO
4.25V
Switching
Enabled
VIN
LDO
VCC
OTP
VCC
TJ
FB 0.6V
150 C
PGOOD
Current
10µA
Emulation &
DC Correction
VIN
On Time
SS
Switching
Feedback
Enabled
0.6V
Comparator
R Q tON
GH
FB
PGOOD Comparator
SQ
Dead
SW
0.555V
Minimum
On Time
Time
Control
VCC
Short-Circuit Detection
0.36V
Switching
Enabled
RQ
SQ
GL
Enable
Hiccup
Hiccup
Enable LDO
Mode
EN/MODE
Enable LDO
1.9V
CCM or CCM/DCM
If 4
consecutive OCP
3V
Zero Cross Detect
SW
If 8 consecutive
ZCD then DCM
if 1 non-ZCD
then exit DCM
OCP
Comparator
50µA
XR76201
-2mV
AGND
ILIM
PGND
Figure 21. Functional Block Diagram
REV1A
10/16
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