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LM22676-Q1 데이터시트(PDF) 4 Page - Texas Instruments

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부품명 LM22676-Q1
상세설명  LM22676/LM22676-Q1 42V, 3A SIMPLE SWITCHER짰 Step-Down Voltage Regulator with Features
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LM22676
LM22676-Q1
SNVS587K – SEPTEMBER 2008 – REVISED APRIL 2013
www.ti.com
Electrical Characteristics (continued)
Limits in standard type are for TJ = 25°C only; limits in boldface type apply over the junction temperature (TJ) range of -40°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 TA = TJ = 25°C, and are provided for reference purposes only. Unless otherwise specified:
VIN = 12V.
Symbol
Parameter
Conditions
Min(1)
Typ(2)
Max(1)
Units
VEN
Enable Threshold Voltage
Falling
1.3
1.6
1.9
V
VENHYST
Enable Voltage Hysteresis
0.6
V
IEN
Enable Input Current
EN Input = 0V
6
µA
TSD
Thermal Shutdown Threshold
150
°C
θJA
Thermal Resistance
TJ Package Junction to ambient
22
°C/W
thermal resistance(3)
θJA
Thermal Resistance
MR Package Junction to ambient
60
°C/W
thermal resistance(4)
(3)
The value of
θJA for the PFM (TJ) package of 22°C/W is valid if package is mounted to 1 square inch of copper. The θJA value can
range from 20 to 30°C/W depending on the amount of PCB copper dedicated to heat transfer. See application note AN-1797 (SNVA328)
for more information.
(4)
The value of
θJA for the SO PowerPAD exposed pad (MR) package of 60°C/W is valid if package is mounted to 1 square inch of copper.
The
θJA value can range from 42 to 115°C/W depending on the amount of PCB copper dedicated to heat transfer.
4
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