Datasheet

5
LTC1911-1.5/LTC1911-1.8
1911f
SI PLIFIED
W
BLOCK DIAGRA
W
–
+
–
+
300k
C
IN
V
IN
50k
150k
V
REF
+
–
ADJ
OFFSET
MODE
CONTROL
STEP-DOWN
CHARGE
PUMP
1
R
A
–
+
–
+
AMP1
–
+
–
+
–
+
AMP2
SOFT-START
1.26V
V
REF
COMP1
BURST
THRESHOLD
C1
+
C1
C2
C1
–
C2
+
C2
–
R
SENSE
V
OUT
C
OUT
6
GND
1911 BD
4
3
2
5
7
–
+
COMP2
600mV
600mV
SHDN
SHORT-CIRCUIT
THRESHOLD
OVERTEMP
DETECT
1.5MHz
OSCILLATOR
60k
140k
V
REF
RAMP
+
2µA
SS/SHDN
V
IN
8
+
SHDN