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LM34919B Datasheet(PDF) 5 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor. Click here to check the latest version.
No. de Pieza. LM34919B
Descripción  Ultra Small 40V, 600 mA Constant On-Time Buck Switching Regulator
Descarga  20 Pages
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Fabricante  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
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LM34919B Datasheet(HTML) 5 Page - National Semiconductor (TI)

 
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Symbol
Parameter
Conditions
Min
Typ
Max
Units
Threshold hysteresis
Voltage at RON/SD
40
mV
Off Timer
t
OFF
Minimum Off-time
V
IN = 6V, ICC = 3mA
60
88
120
ns
V
IN = 8V, ICC = 3mA
58
82
118
Regulation and Over-Voltage Comparators (FB Pin)
V
REF
FB regulation threshold
SS pin = steady state
2.440
2.5
2.550
V
FB over-voltage threshold
2.9
V
FB bias current
FB = 3V
1
nA
Thermal Shutdown
T
SD
Thermal shutdown temperature
175
°C
Thermal shutdown hysteresis
20
°C
Thermal Resistance
θ
JA
Junction to Ambient
0 LFPM Air Flow
61
°C/W
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 1.5k
Ω resistor into each pin.
Note 3: V
CC provides self bias for the internal gate drive and control circuits. Device thermal limitations limit external loading
Note 4: Typical specifications represent the most likely parametric norm at 25°C operation.
5
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