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E-L4971 Datasheet(PDF) 5 Page - STMicroelectronics

Part No. E-L4971
Description  1.5A STEP DOWN SWITCHING REGULATOR
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Maker  STMICROELECTRONICS [STMicroelectronics]
Homepage  http://www.st.com
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L4971
Table 6. Typical Performance (Using Evaluation Board) fsw = 100kHz
Figure 4. Test and valuation board circuit.
Figure 5. PCB and component layout of the figure 4.
Output
Voltage
Output
Ripple
Efficiency
VCC =35V IO = 1.5A
Line Regulation
Io = 1.5A VCC = 8 to 55V
Load Regulation
VCC =35V IO = 0.5 to 1.5A
3.3V
10mV
84 (%)
3mV
6mV
5.1V
10mV
86 (%)
3mV
6mV
12V
12mV
93 (%)
3mV (VCC =15 to 55V)
4mV
D97IN749A
5
2
8
4
1
L4971
C1
220
µF
63V
C8
330
µF
VO=3.3V/1.5A
Vi=8V to 55V
R1
20K
C2
2.7nF
R2
9.1K
C4
22nF
3
7
L1
126
µH
(77120)
6
D1
ST
PS3L60U
C5
100nF
C7
220nF
C6
100nF
R3
R4
C1=220
µF/63V EKE
C2=2.7nF
C5=100nF
C6=100nF
C7=220nF/63V
C8=330
µF/35V CG Sanyo
L1=126
µH KoolMu 77120 - 65 Turns - 0.5mm
R1=20K
R2=9.1K
D1=STPS3L60U
VO(V)
R3(K
Ω)
R4(K
Ω)
3.3
5.1
12
15
18
24
0
2.7
12
16
20
30
4.7
4.7
4.7
4.7
4.7
L4971




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