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L7983 Datasheet(PDF) 28 Page - STMicroelectronics

Part # L7983
Description  60 V, 300 mA synchronous step-down switching regulator with 10 μA quiescent current
PDF  43 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L7983 Datasheet(HTML) 28 Page - STMicroelectronics

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6.2
L7983PUR - Evaluation board
In this section the L7983PUR (adjustable VOUT) evaluation board is described.
The board schematic is shown in Figure 22 and the PCB layout is depicted in Figure 23 and Figure 24.
The main features are:
•
Programmed VOUT = 12 V
•
Max. IOUT = 300 mA
•
Selected FSW = 1 MHz
•
VBIAS = VOUT (switch-over enabled)
Table 9. L7983PUR evaluation board component list (BOM)
Reference
Part
Package
Details
Manufacturer P/N
C1
1 μF
1206
X7R/100V/10%
TDK C3216X7R2A105K
C2
1 μF
1206
X7R/100V/10%
TDK C3216X7R2A105K
C3
470 nF
0603
X7R/16V/10%
C4, C5, C10
N.M.
C6
100 nF
0603
X7R/16V/10%
L1
68 μH
4x4 mm
0.46 A sat/ 950 mΩ
COILCRAFT LPS4018-683M
R1
510 kΩ
0603
1% tolerance
R2
39 kΩ
0603
1% tolerance
R3, R7
N.M.
R4, R9, R10
0
0603
R5, R6, R8
100 kΩ
0603
1% tolerance
U1
L7983
DFN10_3x3
STM L7983PUR
Figure 25. 12 V efficiency (LCM)
0
10
20
30
40
50
60
70
80
90
100
0.0001
0.01
0.1
Output current [A]
18V
24V
36V
48V
60V
0.001
Figure 26. 12 V load regulation (LCM)
11.85
11.9
11.95
12
12.05
12.1
0
0.05
0.1
0.15
0.2
0.25
0.3
Output current [A]
18V
24V
36V
48V
60V
L7983
L7983PUR - Evaluation board
DS13354 - Rev 1
page 28/43



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