LND34063A
8
1
1
2
3
Q
S
R
Q2
Q1
C
7
6
5
100
I
2
3
pk
Oscillator
R
0.33
C
sc
T
V
O
IN
25 V
C
T
+
-
1.25 V
Reference
220 H
µ
L
+
470pf
100
4
1.0 H
µ
V
R
OUT
5.0V/500mA
2
V
O
O
OUT
3.6k
+
+
C
o
100
470
R
1.2k
1
Optional Filter
Fig 3 : STEP DOWN CONVERTER
8
8
1
1
1
2
1
2
V
3
Q
O
3
Q
S
S
R
Q2
OUT
Q2
Q1
R
Q1
C
C
7
7
6
5
100
100
I
pk
I
2
2
3
pk
R
C
T
R
C
T
sc
sc
Oscillator
Oscillator
6
5
3
O
V
V
O
V
OUT
O
IN
O
O
IN
+
-
1.25 V
Reference
+
-
1.25 V
Reference
4
O
4
O
O
O
4b: External NPN Saturated Switch
4a: External NPN Switch
Fig4 : External Boost Connections
for Ic Peak Greater than 1.5A
• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel 312.321.1810 • fax 312.321.1830 • www.lineardimensions.com •
LINEAR_DIMENSIONS [ Linear Dimensions ]
