LM26400YMH NSC [National Semiconductor], LM26400YMH Datasheet - Page 5

• Manufacturer Part Number: LM26400YMH
• Description: Dual 2A, 500kHz Wide Input Range Buck Regulator
• Manufacturer: NSC [National Semiconductor]

ΔI
V
FB_F
SS
Thermal Characteristics
Note 1: Absolute maximum ratings indicate limits beyond which damage to the device may occur. Operating Ratings are conditions under which the device is
intended to be functional, but specific performance is not guaranteed. For guaranteed performance limits and associated test conditions, see Electrical
Characteristics table.
Note 2: EN1 and EN2 pins should never be higher than V
Note 3: The human body model is a 100pF capacitor discharged through a 1.5 kΩ resistor into each pin. Test method is per JESD-22-A114.
Note 4: Value is highly board-dependent. For comparison of package thermal performance only. Not recommended for prediction of junction temperature in real
applications. See THERMAL CONSIDERATIONS for more information.
Note 5: A standard board refers to a four-layer PCB with the size 4.5”x3”x0.063”. Top and bottom copper is 2 oz. Internal plane copper is 1 oz. For details refer
to JESD51-7 standard.
Symbol
Symbol
T
SD_HYS
T
θ
θ
JC
SD
JA
Difference Between SS1 and
SS2 Currents
FB1 and FB2 Frequency Fold-
back Threshold
Junction-to-Ambient Thermal
Resistance (Note 4)
Junction-to-Case-Bottom
Thermal Resistance
Thermal Shutdown
Threshold
Thermal Shutdown
Hysteresis
Description
Parameter
Mount package on a standard board (Note 5) and
test per JESD51-7 standard.
Junction temperature rises.
Junction temperature falls from above T
IN
+ 0.3V.
Conditions
Conditions
5
SD
.
Min
TSSOP
0.35
Typical Value
Typ
28
3
165
15
Max
LLP
2.8
26
3
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Units
°C/W
Unit
µA
°C
V