LT1946A
5
sn1946a 1946afs
–
+
A1
90pF
120k
4µA
SS V
C
COMP
+
–
–
+
A2
–
+
A3
÷ 3
0.5V
FB
SHDN
SHUTDOWN
1946A F02
1 78
0.01Ω
GND
SW
5
4
EXPOSED
PAD
23
V
IN
6
1.25V
REFERENCE
2.7MHz
OSCILLATOR
S
RQ
RAMP
GENERATOR
Σ
Q1
DRIVER
COMPARATOR
R2 (EXTERNAL)
R1 (EXTERNAL)
FB
V
OUT
Figure 2. Block Diagram
BLOCK DIAGRA
W
