LTC3631 Datasheet, PDF (7/22 Pages) Linear Technology – High Effi ciency, High Voltage 100mA Synchronous Step-Down Converter

BLOCK DIAGRAM
I_SET
1μA
3
PEAK CURRENT
COMPARATOR
LTC3631
V_IN
2
C2
RUN
5
+
1.2V –
HYST
7
LOGIC
AND
SHOOT-
THROUGH
PREVENTION
SW
L1
1
V_OUT
C1
GND
GND
8
9
REVERSE CURRENT
COMPARATOR
FEEDBACK
COMPARATOR
VOLTAGE
REFERENCE
0.800V
PART
NUMBER
R1 R2
LTC3631
0
d
LTC3631-3.3 2.5M 800k
LTC3631-5 4.2M 800k
5μA _SS
4
R1
R2
V_OUT/V_FB
6
IMPLEMENT DIVIDER
EXTERNALLY FOR
ADJUSTABLE VERSION
3631 BD
3631fb
7