RT8253B RICHTEK [Richtek Technology Corporation], RT8253B Datasheet - Page 3

• Manufacturer Part Number: RT8253B
• Description: 3A, 23V, 1.2MHz Synchronous Step-Down Converter
• Manufacturer: RICHTEK [Richtek Technology Corporation]

DS8253B-02 March 2011
Function Block Diagram
VIN
EN
SS
5k
Comparator
3V
Shutdown
1.2V
2.7V
6µA
Comparator
Lockout
+
-
V
VA V
CC
Regulator
-
+
Internal
CC
FB
0.4V
0.8V
Comparator
Foldback
Control
UV
+
-
+
-
+
EA
Oscillator
COMP
Comparator
Slope Comp
Current
+
-
S
R
Current Sense
Amplifier
Q
Q
+
-
85mΩ
85mΩ
RT8253B
VA
www.richtek.com
BOOT
SW
GND
3