LM20145EVAL National Semiconductor, LM20145EVAL Datasheet - Page 2

• 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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Bill of Materials
Connection Descriptions
Designator
Test Points
C
C
C
R
R
R
R
C
C
C
C
U1
R
C
R
OUT
Terminal Silkscreen
BYP
EXT
L
FB1
FB2
PG
SS
C1
C1
C2
IN
F
F
T
SS/TRACK
PGOOD
VOUT
GND
VIN
EN
Synchronous Buck Regulator
100 µF, 1210, X5R, 6.3V
100 µF, 1210, X5R, 6.3V
100 nF, 0603, X7R, 16V
2.2 nF, 0603, X7R, 25V
33 nF, 0603, X7R, 25V
1 µF, 0603, X5R, 6.3V
1 µF, 0603, X5R, 6.3V
5.23 kΩ, 0603
4.99 kΩ, 0603
100 kΩ, 0603
Description
10 kΩ, 0603
10 kΩ, 0603
1 µH, 6 mΩ
Test Points
1Ω, 0603
OPEN
This terminal is the input voltage to the device. The device will operation over the input voltage
range of 2.95V to 5.5V. The absolute maximum voltage rating for this pin is 6V.
This terminal is the ground connection to the device. There are two different GND connections
on the PCB. One should be used for the input supply and the other for the load.
This terminal connects to the output voltage of the power supply and should be connected to
the load.
This terminal connects to the enable pin of the device. This terminal should be connected to
V
the device. The operating voltage for this pin should not exceed 5.5V. The absolute maximum
voltage rating on this pin is 6V.
This terminal provides access to the SS/TRK pin of the device. Connections to this terminal
are not needed for most applications. The feedback pin of the device will track the voltage on
the SS/TRK pin if it is driven with an external voltage source that is below the 0.8V reference.
The voltage on this pin should not exceed 5.5V during normal operation. The absolute
maximum voltage rating on this pin is 6V.
This terminal connects to the power good output of the device. There is a 10 kΩ pull-up resistor
from this pin to the input voltage. The voltage on this pin should not exceed 5.5V during normal
operation and has an absolute maximum voltage rating of 6V.
IN
or driven externally. If driven externally, a voltage typically greater than 1.18V will enable
GRM32ER60J107ME20
GRM32ER60J107ME20
GRM188R71C104KA01
GRM188R60J105KA01
GRM188R60J105KA01
CRCW06031002F-e3
CRCW06035231F-e3
CRCW06031003F-e3
CRCW06034991F-e3
CRCW06031002F-e3
CRCW06031R0J-e3
160-1026-02-01-00
VJ0603Y222KXXA
VJ0603Y333KXXA
MSS1038-102NL
Part Number
LM20145MH
2
OPEN
Description
Qty
1
1
1
1
1
1
1
1
1
1
1
0
1
1
1
1
7
National Semiconductor
Vishay-Vitramon
Vishay-Vitramon
Manufacturer
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Cambion
Coilcraft
Murata
Murata
Murata
Murata
Murata
N/A