LM26003, LM26003-Q1

SNVS576F – AUGUST 2008 – REVISED FEBRUARY 2015

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Device Functional Modes (continued)

Dwake = Iload/Isleep

where

•

Dwake is the percentage of time awake when the load current is below the sleep threshold.

(7)

Sleep mode combined with low IQ operation minimizes the input supply current. Input supply current in sleep

mode can be calculated based on the wake duty cycle, as shown below:

Iin = Iq + (IQG x Dwake) + (Io x D)

(8)

Where IQG is the gate drive current, calculated as:

IQG = (9.2 x 10

-9) x f

SW

And Io is the sum of Iload, Ibias, and current through the feedback resistors.

Because this calculation applies only to sleep mode, use the Iq_Sleep_VB and IBIAS_SLEEP values from the Electrical

Characteristics. If VBIAS is connected to ground, use the same equation with Ibias equal to zero and Iq_Sleep_VDD.

16

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