LMZ14203DEMO/NOPB National Semiconductor, LMZ14203DEMO/NOPB Datasheet - Page 4

• Manufacturer Part Number: LMZ14203DEMO/NOPB
• Description: BOARD DEV PWR MODULE LMZ14203
• Manufacturer: National Semiconductor
• Series: SIMPLE SWITCHER®r

Specifications of LMZ14203DEMO/NOPB

• Main Purpose: DC/DC, Step Down
• Outputs And Type: 1, Non-Isolated
• Voltage - Output: 3.3V
• Current - Output: 3A
• Voltage - Input: 6 ~ 42 V
• Regulator Topology: Buck
• Frequency - Switching: Up to 1MHz
• Board Type: Fully Populated
• Utilized Ic / Part: LMZ14203
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -
• Other names: LMZ14203DEMO

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load current. Refer to the table above when modifying the
board for a different output voltage. Resistor values shown
will minimize error in output voltage setting.
RON Resistor: The primary function of the RON resistor is to
set the On-Time interval of the internal control section switch-
ing cycle. The secondary function of the RON resistor is to
create a nearly constant operating frequency over the input
operating voltage range. If the output voltage of the regulator
is changed by adjusting the feedback divider then it is gener-
ally required that the RON resistor value also be changed in
order to maintain the same operating frequency.
Performance Characteristics
Line and Load Regulation @ 25°C
Efficiency 24V Input@ 25°C
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Cout A parallel connection of a 1uF 50V and a 100uF 6.3V
multilayer ceramic are used for the output capacitor. Loca-
tions are provided on the PCB assembly for experimenting
with additional output capacitors. Some recommended values
are shown on the schematic as “DNS” and labeled in the PCB
silkscreen as “OPT”.
CinA 10 uF 50V multilayer ceramic is connected as the input
filter. Locations are provided on the PCB assembly for exper-
imenting with additional input capacitors. Some recommend-
ed values are shown on the schematic as “DNS” and labeled
in the PCB silkscreen as “OPT”.
Dissipation, 24V Input@ 25°C
24V
Transient Response
IN
3.3V
o
0.6A to 3A Step
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