E-L4971 STMicroelectronics, E-L4971 Datasheet - Page 5
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E-L4971
Manufacturer Part Number
E-L4971
Description
Switching Converters, Regulators & Controllers 3.3 to 50V Step-Down
Manufacturer
STMicroelectronics
Datasheet
1.E-L4971.pdf
(13 pages)
Specifications of E-L4971
Output Voltage
3.5 V
Mounting Style
Through Hole
Package / Case
PDIP-8
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
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.
Voltage
Output
3.3V
5.1V
12V
Vi=8V to 55V
220µF
Output
63V
Ripple
C
10mV
10mV
12mV
C1=220µF/63V EKE
C2=2.7nF
C5=100nF
C6=100nF
C7=220nF/63V
C8=330µF/35V CG Sanyo
L1=126µH KoolMu 77120 - 65 Turns - 0.5mm
R1=20K
R2=9.1K
D1=STPS3L60U
1
220nF
C
7
V
CC
2.7nF
20K
R
C
Efficiency
1
2
=35V I
84 (%)
86 (%)
93 (%)
100nF
C
O
5
= 1.5A
5
3
2
22nF
C
4
7
L4971
9.1K
R
2
I
o
1
3mV (V
= 1.5A V
Line Regulation
100nF
6
C
V
6
3.3
5.1
O
12
15
18
24
D97IN749A
(V)
CC
8
4
PS3L60U
3mV
3mV
CC
=15 to 55V)
D1
ST
= 8 to 55V
L4971
R3(KΩ)
2.7
12
16
20
30
0
(77120)
126µH
L1
330µF
C
R4(KΩ)
8
4.7
4.7
4.7
4.7
4.7
V
CC
V
O
=3.3V/1.5A
Load Regulation
=35V I
R
R
3
4
6mV
6mV
4mV
O
= 0.5 to 1.5A
L4971
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