LM20145EVAL National Semiconductor, LM20145EVAL Datasheet - Page 18

• Manufacturer Part Number: LM20145EVAL
• Description: BOARD EVAL 5A POWERWISE LM20145
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM20145EVAL

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.2V
• Current - Output: 5A
• Voltage - Input: 2.95 ~ 5.5V
• Regulator Topology: Buck
• Frequency - Switching: 500kHz
• Board Type: Fully Populated
• Utilized Ic / Part: LM20145
• 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
C
C
C
R
C
C
C
C
C
U1
U1
R
C
R
R
C
R
OUT
VCC
OUT
VCC
L
FB1
FB2
L
C1
C1
C2
SS
C1
C1
C2
SS
IN
IN
F
F
T
F
F
T
Synchronous Buck Regulator
Synchronous Buck Regulator
100 pF, 0603, COG, 50V
330 pF, 0603, COG, 50V
100 µF, 1210, X5R, 6.3V
100 µF, 1210, X5R, 6.3V
100 nF, 0603, X7R, 16V
100 nF, 0603, X7R, 16V
2.2 nF, 0603, X7R, 25V
3.3 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
2.2 µH, 8.2 mΩ
2.2 µH, 8.2 mΩ
49.9 kΩ, 0603
31.6 kΩ, 0603
10.2 kΩ, 0603
205 kΩ, 0603
205 kΩ, 0603
330 µF, 6.3V
330 µF, 6.3V
Description
Description
20 kΩ, 0603
1Ω, 0603
1Ω, 0603
IN
IN
= 5V, V
= 3.3V to 5V, V
OUT
= 3.3V, F
IHLP4040DZER2R2M01
IHLP4040DZER2R2M01
GRM32ER60J107ME20
GRM32ER60J107ME20
GRM188R71C104KA01
GRM188R71C104KA01
GRM188R60J105KA01
GRM188R60J105KA01
CRCW06034992F-e3
CRCW06032053F-e3
CRCW06033162F-e3
CRCW06031022F-e3
CRCW06032002F-e3
CRCW06032053F-e3
CRCW06031R0J-e3
CRCW06031R0J-e3
VJ0603A331AKXAA
VJ0603Y222KXXA
VJ0603A101KXAA
VJ0603Y333KXXA
VJ0603Y332KXXA
VJ0603Y333KXXA
FIGURE 11.
OUT
Part Number
Part Number
6TPE330ML
6TPE330ML
LM20145
LM20145
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
= 300kHz, I
SW
= 300kHz, 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
30030760
Murata
Murata
Murata
Murata
Murata
Murata
Vishay
Vishay
Sanyo
Sanyo
C1
as outline in the design guide.
= 5A)
OUTMAX
= 5A)
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