LND34063A Datasheet, PDF (6/7 Pages) Linear Dimensions Semiconductor – DC-to-DC Converter Control Circuits

LND34063A
8
7
Rsc 0.33
6
VIN_O
25 V
+
100
5
R1 1.2k
1
2
3
S
CR
I
pk
Oscillator
CT
+
-
R2
3.6k
1
Q
Q2
100
1.25 V
Reference
Q1
2
3
CT
470pf
4
L ^220µH
V
OUT
O 5.0V/500mA
+
470
Co
1.0 µH
100
O
V
OUT
+
Fig 5 : VOLTAGE INVERTING CONVERTER
Optional Filter
8
7
Rsc
6
V
IN
O
5
O
1
2
3
S
CR
I
pk
C
Oscillator ^T
+
-
1
Q
Q2
100
1.25 V
Reference
Q1
2
3
O
4
O
6a: External NPN Switch
O VOUT
8
7
Rsc
6
VIN _O
5
O
1
2
3
S
CR
I
pk
Oscillator
CT
+
-
1
Q
Q2
100
1.25 V
Reference
Q1
2
3
O
4
O
6b: External NPN Saturated Switch
O
V
OUT
Fig6 : External Boost Connections
for Ic Peak Greater than 1.5A
• Linear Dimensions, Inc. • 445 East Ohio Street, Chicago IL 60611 USA • tel [phone] • fax [phone] • www.lineardimensions.com •