L5973D
APPLICATION CIRCUIT
In figure 6 is shown the demo board application circuit, where the input supply voltage, V , can range from 4.4V
cc
to 25V due to the rated voltage of the input capacitor and the output voltage is adjustable from 1.235V to V .
cc
Figure 6. Demo board Application Circuit
VREF
L1 15µH
3.3V
VOUT=3.3V
6
OUT
FB
1
5
VIN = 4.4V to 25V
VCC
D1
8
2
R1
5.6K
L5973D
STPS2L25U
SYNC.
COMP
C2
330µF
6.3V
3
7
C1
10µF
25V
4
C4
22nF
INH
GND
R2
CERAMIC
3.3K
C3
220pF
R3
4.7K
D03IN1440
Table 1. Component List
Reference
Part Number
Description
10µF, 25V
Manufacturer
TOKIN
C1
C2
C3
C4
R1
R2
R3
D1
L1
POSCAP 6TPB330M
C1206C221J5GAC
C1206C223K5RAC
330µF, 6.3V
Sanyo
220pF, 5%, 50V
22nF, 10%, 50V
KEMET
KEMET
Neohm
Neohm
Neohm
ST
5.6K, 1%, 0.1W 0603
3.3K, 1%, 0.1W 0603
4.7K, 1%, 0.1W 0603
2A, 25V
STPS2L25U
DO3316P-153
15µH, 3A
COILCRAFT
5/10
STMICROELECTRONICS [ ST ]
