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LMZ14202EXTTZ bảng dữ liệu(PDF) 5 Page - Texas Instruments

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Giải thích chi tiết về linh kiện  LMZ14202EXT 2A SIMPLE SWITCHER짰 Power Module with 42V Maximum Input Voltage for Military and Rugged Applications
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LMZ14202EXT
www.ti.com
SNVS665E – JUNE 2010 – REVISED APRIL 2013
Electrical Characteristics
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -55°C
to +125°C. Minimum and Maximum limits are ensured through test, design or statistical correlation. Typical values represent
the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. Unless otherwise stated the
following conditions apply: VIN = 24V, Vout = 3.3V
Min
Typ
Max
Symbol
Parameter
Conditions
Units
(1)
(2)
(1)
SYSTEM PARAMETERS
Enable Control(3)
VEN
EN threshold trip point
VEN rising
1.10
1.18
1.26
V
VEN-HYS
EN threshold hysteresis
VEN falling
90
mV
Soft-Start
ISS
SS source current
VSS = 0V
4.9
8
11
µA
ISS-DIS
SS discharge current
-200
µA
Current Limit
ICL
Current limit threshold
d.c. average
2.3
2.6
3.65
A
ON/OFF Timer
tON-MIN
ON timer minimum pulse width
150
ns
tOFF
OFF timer pulse width
260
ns
Regulation and Over-Voltage Comparator
VFB
In-regulation feedback voltage
VSS >+ 0.8V
0.775
0.795
0.815
V
TJ = -55°C to 125°C
IO = 2A
VSS >+ 0.8V
0.786
0.802
0.818
V
TJ = 25°C
IO = 10 mA
VFB-OV
Feedback over-voltage protection
0.92
V
threshold
IFB
Feedback input bias current
5
nA
IQ
Non Switching Input Current
VFB= 0.86V
1
mA
ISD
Shut Down Quiescent Current
VEN= 0V
25
μA
Thermal Characteristics
TSD
Thermal Shutdown
Rising
165
°C
TSD-HYST
Thermal shutdown hysteresis
Falling
15
°C
θJA
Junction to Ambient(4)
4 layer JEDEC Printed Circuit Board,
19.3
°C/W
100 vias, No air flow
2 layer JEDEC Printed Circuit Board, No
21.5
°C/W
air flow
θJC
Junction to Case
No air flow
1.9
°C/W
PERFORMANCE PARAMETERS
ΔVO
Output Voltage Ripple
8
mV PP
ΔVO/ΔVIN
Line Regulation
VIN = 12V to 42V, IO= 2A
.01
%
ΔVO/IOUT
Load Regulation
VIN = 24V
1.5
mV/A
η
Efficiency
VIN = 24V VO = 3.3V IO = 1A
86
%
η
Efficiency
VIN = 24V VO = 3.3V IO = 2A
85
%
(1)
Min and Max limits are 100% production tested at 25°C. Limits over the operating temperature range are ensured through correlation
using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2)
Typical numbers are at 25°C and represent the most likely parametric norm.
(3)
EN 55022:2006, +A1:2007, FCC Part 15 Subpart B: 2007. See AN-2024 SNVA422 and layout for information on device under test.
(4)
θJA 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
Copyright © 2010–2013, Texas Instruments Incorporated
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