RT6228A/B/C
Functional Block Diagram
RT6228A
VIN
BOOT
LX
Input UVLO
4.2V
ILMT
EN
-
+
PWM
Control
&
Protect
Logic
Current Sense
Internal
SST
R
DIS
Thermal
PGND
Protection
PGOOD
AGND
+
0.6V
FB
-
EN
5V
LDO
VIN
VCC
4.7V
+
-
BYP
RT6228B
VIN
BOOT
LX
Input UVLO
4.2V
ILMT
EN
-
+
PWM
Control
&
Internal
SST
Current Sense
R
DIS
Protect
Logic
Thermal
Protection
PGND
PGOOD
0.6V
+
-
VOUT
EN
AGND
5V
LDO
VIN
VCC
4.7V
+
-
BYP
RT6228C
VIN
BOOT
LX
Input UVLO
5.2V
-
+
EN
Internal
SST
Current Sense
PWM
Control
&
Protect
Logic
R
DIS
Thermal
Protection
CLK
PGND
300kHz
PGOOD
VOUT
5V
LDO
VIN
VCC
LDO
0.6V
+
-
3.3V
LDO
AGND
4.7V
+
-
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4
DS6228A/B/C-02 September 2018