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LMZ14203 데이터시트 PDF




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부품번호 LMZ14203 기능
기능 Power Module
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LMZ14203 데이터시트, 핀배열, 회로
LMZ14203
February 1, 2010
3A SIMPLE SWITCHER® Power Module with 42V Maximum
Input Voltage
Easy to use 7 pin package
Performance Benefits
Operates at high ambient temperature with no thermal
derating
High efficiency reduces system heat generation
Low radiated emissions (EMI) complies with EN55022
class B standard
Passes 10V/m radiated immunity EMI test standard
EN61000 4-3
TO-PMOD 7 Pin Package
30107086
10.16 x 13.77 x 4.57 mm (0.4 x 0.542 x 0.18 in)
θJA = 20°C/W, θJC = 1.9°C/W
RoHS Compliant
System Performance
Efficiency VIN = 24V VOUT = 5.0V
Electrical Specifications
18W maximum total output power
Up to 3A output current
Input voltage range 6V to 42V
Output voltage range 0.8V to 6V
Efficiency up to 90%
Key Features
Integrated shielded inductor
Simple PCB layout
Flexible startup sequencing using external soft-start and
precision enable
Protection against inrush currents and faults such as input
UVLO and output short circuit
www.DataSh4e0e°tC4Ut.oco1m25°C junction temperature range
Single exposed pad and standard pinout for easy
mounting and manufacturing
Fast transient response for powering FPGAs and ASICs
Low output voltage ripple
Pin-to-pin compatible family:
LMZ14203/2/1 (42V max 3A, 2A, 1A)
LMZ12003/2/1 (20V max 3A, 2A, 1A)
Fully enabled for Webench® Power Designer
Applications
Point of load conversions from 12V and 24V input rail
Time critical projects
Space constrained / high thermal requirement applications
Negative output voltage applications
30107036
Thermal derating curve
VIN = 24V, VOUT = 5.0V,
30107037
Radiated Emissions (EN 55022 Class B)
from Evaluation Board
© 2010 National Semiconductor Corporation 301070
30107038
www.national.com




LMZ14203 pdf, 반도체, 판매, 대치품
Symbol
η
η
Parameter
Efficiency
Efficiency
Conditions
VIN = 24V VO = 3.3V IO = 1A
VIN = 24V VO = 3.3V IO = 3A
Min
(Note 3)
Typ
(Note 4)
92
85
Max
(Note 3)
Units
%
%
Note 1: Absolute Maximum Ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions under which operation of the
device is intended to be functional. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The human body model is a 100pF capacitor discharged through a 1.5 kresistor into each pin. Test method is per JESD-22-114.
Note 3: Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are guaranteed through correlation using Statistical
Quality Control (SQC) methods. Limits are used to calculate National’s Average Outgoing Quality Level (AOQL).
Note 4: Typical numbers are at 25°C and represent the most likely parametric norm.
Note 5: EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See AN-2024 and layout for information on device under test.
Note 6: Theta JA measured on a 1.705” x 3.0” four layer board, with one ounce copper, thirty five 12 mil thermal vias, no air flow, and 1W power dissipation.
Refer to PCB layout diagrams
Typical Performance Characteristics
Unless otherwise specified, the following conditions apply: VIN = 24V; Cin = 10uF X7R Ceramic; CO = 100uF X7R Ceramic; Tam-
bient = 25 C for efficiency curves and waveforms.
Efficiency 6V Input @ 25°C
Dissipation 6V Input @ 25°C
www.DataSheet4U.com
30107031
Efficiency 12V Input @ 25°C
30107032
Dissipation 12V Input @ 25°C
www.national.com
30107003
4
30107004

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LMZ14203 전자부품, 판매, 대치품
Efficiency 36V input @ 85°C
Dissipation 36V input @ 85°C
30107046
Line and Load Regulation @ 25°C
30107047
Output Ripple
24VIN 3.3VO 3A, BW = 200 MHz
30107048
Transient Response
www.DataSheet4U.c2o4mVIN 3.3VO 0.6A to 3A Step
30107005
Thermal Derating VOUT = 3.3V
30107006
7
30107051
www.national.com

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