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LM3489MMX Datasheet(PDF) 4 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM3489MMX
Descripción Electrónicos  Hysteretic PFET Buck Controller with Enable Pin
Download  15 Pages
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM3489MMX Datasheet(HTML) 4 Page - National Semiconductor (TI)

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Electrical Characteristics (Note 5), (Note 6) Specifications in Standard type face are for T
J = 25˚C, and in
bold type face apply over the full Operating Temperature Range (T
J = −40˚C to +125˚C). Unless otherwise specified, VIN =
12V, V
ISNS =VIN − 1V, and VADJ =VIN − 1.1V. Datasheet min/max specification limits are guaranteed by design, test, or
statistical analysis. (Continued)
Note 1: Absolute maximum ratings are limits beyond which damage to the device may occur. Operating Ratings are conditions for which the device is intended to
be functional, but device parameter specifications may not be guaranteed. For guaranteed specifications and test conditions, see the Electrical Characteristics.
Note 2: The maximum allowable power dissipation is a function of the maximum junction temperature, TJ_MAX, the junction-to-ambient thermal resistance, θJA =
240˚C/W, and the ambient temperature, TA. The maximum allowable power dissipation at any ambient temperature is calculated using:
PD_MAX =(TJ_MAX -TA)/θJA. Exceeding the maximum allowable power dissipation will cause excessive die temperature.
Note 3: This pin is internally pulled high and clamped at 8V typical. The absolute maximum and operating maximum rating specifies the input level allowed for an
external voltage source applied to this pin without triggering the internal clamp with margin.
Note 4: The human body model is a 100 pF capacitor discharged through a 1.5k
Ω resistor into each pin. The machine model is a 200pF capacitor discharged
directly into each pin. MIL-STD-883 3015.7
Note 5: All limits are guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits are 100%
tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC) methods. All limits are used to calculate
Average Outgoing Quality Level (AOQL).
Note 6: Typical numbers are at 25˚C and represent the most likely norm.
Note 7: The VFB is the trip voltage at the FB pin when PGATE switches from high to low.
Note 8: VCL =ICL_ADJ *RADJ
Note 9: Bias current flows out from the FB pin.
Note 10: A 1000pF capacitor is connected between VIN and PGATE.
www.national.com
4


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