LM20143EVAL National Semiconductor, LM20143EVAL Datasheet - Page 18

• Manufacturer Part Number: LM20143EVAL
• Description: BOARD EVAL 3A POWERWISE LM20143
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM20143EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.2V
• Current - Output: 3A
• Voltage - Input: 2.95 ~ 5.5V
• Regulator Topology: Buck
• Frequency - Switching: 1.5MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM20143
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Power - Output: -

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Typical Application Circuits
This section provides several application solutions with a bill
of materials. All bill of materials reference the below figure.
Bill of Materials (V
Bill of Materials (V
Designator
Designator
C
C
C
C
R
R
R
R
R
C
C
R
C
C
C
C
U1
U1
R
C
R
R
C
R
OUT
VCC
OUT
VCC
L
FB1
FB2
L
FB1
FB2
C1
C1
SS
C1
C1
SS
IN
IN
F
F
T
F
F
T
Synchronous Buck Regulator
Synchronous Buck Regulator
100 µF, 1210, X5R, 6.3V
100 µF, 1210, X5R, 6.3V
100 nF, 0603, X7R, 16V
100 nF, 0603, X7R, 16V
47 µF, 1210, X5R, 6.3V
3.3 nF, 0603, X7R, 25V
47 µF, 1210, X5R, 6.3V
4.7 nF, 0603, X7R, 25V
33 nF, 0603, X7R, 25V
33 nF, 0603, X7R, 25V
1 µF, 0603, X5R, 6.3V
1 µF, 0603, X5R, 6.3V
1.5 µH, 8.1mΩ
31.6 kΩ, 0603
10.2 kΩ, 0603
4.99 kΩ, 0603
1.2 µH, 17mΩ
150 kΩ, 0603
150 kΩ, 0603
Description
10 kΩ, 0603
Description
10 kΩ, 0603
2 kΩ, 0603
1Ω, 0603
1Ω, 0603
IN
IN
= 5V, V
= 3.3V to 5V, V
OUT
= 3.3V, F
GRM32ER60J476ME20
GRM32ER60J107ME20
GRM32ER60J476ME20
GRM32ER60J107ME20
GRM188R71C104KA01
GRM188R71C104KA01
GRM188R60J105KA01
GRM188R60J105KA01
CRCW06031002F-e3
CRCW06031503F-e3
CRCW06033162F-e3
CRCW06031022F-e3
CRCW06032001F-e3
CRCW06031503F-e3
CRCW06034991F-e3
CRCW06031002F-e3
CRCW06031R0J-e3
CRCW06031R0J-e3
VJ0603Y332KXXA
VJ0603Y333KXXA
VJ0603Y472KXXA
VJ0603Y333KXXA
DO1813H-122ML
FIGURE 11.
MSS1038-152NL
OUT
Part Number
Part Number
LM20143
LM20143
18
= 1.2V, F
SW
The compensation for these solutions were optimized to work
over a wide range of input and output voltages; if a faster
transient response is needed reduce the value of C
calculate the new value for R
= 750kHz, I
SW
= 750kHz, I
National Semiconductor
National Semiconductor
OUTMAX
Vishay-Vitramon
Vishay-Vitramon
Vishay-Vitramon
Vishay-Vitramon
Manufacturer
Manufacturer
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
30030501
Coilcraft
Coilcraft
Murata
Murata
Murata
Murata
Murata
Murata
Murata
Murata
C1
as outline in the design guide.
= 3A)
OUTMAX
= 3A)
Qty
Qty
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
C1
and