LM3485MMX datasheet(4/15 Pages) NSC

4 / 15 page

Electrical Characteristics (Continued)

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, VISNS =VIN − 1V, and VADJ =VIN − 1.1V. Datasheet

min/max specification limits are guaranteed by design, test, or statistical analysis.

Symbol

Parameter

Conditions

Min

(Note 4)

Typ

(Note 5)

Max

(Note 4)

Unit

ONMIN_CL

Minimum on time in

current limit

ISNS =VADJ+0.1V

FB = 1.0V Cload on

OUT = 1000pF

(Note 9)

175

FB/∆VIN

Feedback Voltage

Line Regulation

4.5

≤ V

IN ≤ 35V

0.010

%/V

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: The human body model is a 100 pF capacitor discharged through a 1.5k

Ω resistor into each pin.

Note 4: 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 5: Typical numbers are at 25˚C and represent the most likely norm.

Note 6: The VFB is the trip voltage at the FB pin when PGATE switches from high to low.

Note 7: VCL =ICL_ADJ * RADJ

Note 8: Bias current flows out from the FB pin.

Note 9: A 1000pF capacitor is connected between VIN and PGATE.

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