LMZ14203HTZ Datasheet, PDF (1/20 Pages) National Semiconductor (TI) – 3A SIMPLE SWITCHER Power Module for High Output

LMZ14203H
January 21, 2011
3A SIMPLE SWITCHER^® Power Module for High Output
Voltage
Easy to use 7 pin package
Performance Benefits
■ ^{High efficiency reduces system heat generation}
■ ^{Low radiated EMI (EN 55022 Class B compliant)(Note 5)}
■ ^{No compensation required}
■ ^{Low package thermal resistance}
System Performance
TO-PMOD 7 Pin Package
30135686
10.16 x 13.77 x 4.57 mm (0.4 x 0.542 x 0.18 in)
θ_JA = 16°C/W, θ_JC = 1.9°C/W
RoHS Compliant
Electrical Specifications
■ ^{Up to 3A output current}
■ ^{Input voltage range 6V to 42V}
■ ^{Output voltage as low as 5V}
■ ^{Efficiency up to 97%}
Key Features
■ ^{Integrated shielded inductor}
■ ^{Simple PCB layout}
■ ^{Flexible startup sequencing using external soft-start and}
precision enable
■ ^{Protection against inrush currents}
■ ^{Input UVLO and output short circuit protection}
■ ^{– 40°C to 125°C junction temperature range}
■ ^{Single exposed pad and standard pinout for easy}
mounting and manufacturing
■ ^{Low output voltage ripple}
■ ^{Pin-to-pin compatible family:}
LMZ14203H/2H/1H (42V max 3A, 2A, 1A)
LMZ14203/2/1 (42V max 3A, 2A, 1A)
LMZ12003/2/1 (20V max 3A, 2A, 1A)
■ ^{Fully enabled for Webench® Power Designer}
Applications
■ ^{Intermediate bus conversions to 12V and 24V rail}
■ ^{Time critical projects}
■ ^{Space constrained / high thermal requirement applications}
■ ^{Negative output voltage applications}
Efficiency V_OUT = 12V
100
95
90
85
80
VIN = 15V
75
VIN = 24V
VIN = 30V
VIN = 36V
VIN = 42V
70
0.0 0.5 1.0 1.5 2.0 2.5 3.0
OUTPUT CURRENT (A)
301356100
Thermal Derating V_OUT = 12V, θ_JA = 16°C/W
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-20
VIN = 15V
VIN = 24V
VIN = 42V
0 20 40 60
80 100 120 140
AMBIENT TEMPERATURE (°C)
30135678
Radiated Emissions (EN 55022 Class B)
80
Emissions (Evaluation Board)
70
EN 55022 Limit (Class B)
60
50
40
30
20
10
0
0 200 400 600 800 1,000
FREQUENCY (MHz)
30135691
SIMPLE SWITCHER^® is a registered trademark of National Semiconductor Corporation
© 2011 National Semiconductor Corporation 301356
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