LM20146MHEVAL National Semiconductor, LM20146MHEVAL Datasheet - Page 2

• Manufacturer Part Number: LM20146MHEVAL
• Description: BOARD EVALUATION FOR LM20146MH
• Manufacturer: National Semiconductor
• Series: PowerWise®r

Specifications of LM20146MHEVAL

• Design Resources: LM20146 Design Spreadsheet
• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 1.2V
• Current - Output: 6A
• Voltage - Input: 2.95 ~ 5.5V
• Regulator Topology: Buck
• Board Type: Fully Populated
• Utilized Ic / Part: LM20146
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Frequency - Switching: -

www.national.com
Bill of Materials
Connection Descriptions
EN, PGOOD,
P1,P2,P3,P4
Designator
SW, SS/RK
VOUT TP
C
R
R
R
C
C
R
C
C
C
R
C
U1
R
C
R
VCC
L
FB1
FB2
O1
O2
PG
SS
EN
C1
C1
C2
IN
F
F
T
PCB Silkscreen
VOUT TP
SS/TRK
PGOOD
VOUT
GND
VIN
SW
EN
Synchronous Buck Regulator
0.68µH, 5.39 mΩ, 14A Isat
100µF, 1210, X5R, 6.3V
100µF, 1210, X5R, 6.3V
33.0nF, 0603, X7R, 25V
1.0µF, 0603, X5R, 6.3V
1.0µF, 0603, X5R, 6.3V
1.2nF, 0603, COG, 50V
8.25 kΩ, 0603
10.0kΩ, 0603
4.99kΩ, 0603
10.0kΩ, 0603
10.0kΩ, 0603
48.7kΩ, 0603
Description
POWER I/O
Test Points
1.0Ω, 0603
Test Point
OPEN
OPEN
This terminal is the input voltage to the device. The device will operate 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 10kΩ 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.
This point allows a scope probe to be connected to observe the switch node voltage.
This terminal provides an oscilloscope probe connection directly to VOUT to probe the
transient response and output voltage ripple.
IN
or driven externally. If driven externally, a voltage typically greater than 1.18V will enable
GRM1885C1H122JA01
GRM188R60J105KA01
GRM188R60J105KA01
SPM6530T-R68M140
CRCW06031002F-e3
CRCW06038252F-e3
CRCW06034991F-e3
CRCW06031002F-e3
CRCW06031002F-e3
CRCW06034872F-e3
CRCW06031R0J-e3
C3225X5R0J107M
C3225X5R0J107M
160-1026-02-01-00
VJ0603Y333KXXA
Part Number
LM20146MH
131503100
2
52F7279
N/A
N/A
Description
Qty
1
1
1
0
1
1
1
1
1
1
1
0
1
1
1
1
1
1
4
4
National Semiconductor
Vishay-Vitramon
Manufacturer
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Vishay-Dale
Tektronix
Keystone
Cambion
Murata
Murata
Murata
TDK
TDK
TDK
N/A
N/A