LM2788 datasheet(4/12 Pages) NSC

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Electrical Characteristics

(Notes 2, 8) Limits in standard typeface and typical values apply for T

J =25

oC.

Limits in boldface type apply over the operating junction temperature range. Unless otherwise specified: 2.6

≤ V

≤ 5.5V,

V(EN) = V

IN,C1 =C2 = 1µF, CIN =COUT = 10µF. (Note 9)

(Continued)

Note 4: Thermal shutdown circuitry protects the device from permanent damage.

Note 5: The Human body model is a 100 pF capacitor discharged through a 1.5 k

Ω resistor into each pin. The machine model is a 200pF capacitor discharged

directly into each pin.

Note 6: Maximum ambient temperature (TA-MAX) is dependent on the maximum operating junction temperature (TJ-MAX-OP = 125

oC), the maximum power

dissipation of the device in the application (PD-MAX), and the junction-to ambient thermal resistance of the part/package in the application (θJA), as given by the

following equation: TA-MAX =TJ-MAX-OP -(θJA xPD-MAX). The ambient temperature operating rating is provided merely for convenience. This part may be operated

outside the listed TA rating, so long as the junction temperature of the device does not exceed the maximum operating rating of 125

oC.

Note 7: Junction-to-ambient thermal resistance is a highly application and board-layout dependent. In applications where high maximum power dissipation exists,

special care must be paid to thermal dissipation issues. Fore more information on these topics, please refer to the Power Dissipation section of this datasheet.

Note 8: All room temperature limits are 100% tested or guaranteed through statistical analysis. All limits at temperature extremes are guaranteed by correlation

using standard Statistical Quality Control methods (SQC). All limits are used to calculate Average Outgoing Quality Level (AOQL). Typical numbers are not

guaranteed, but do represent the most likely norm.

Note 9: CFLY,CIN, and COUT : Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics

Note 10: Nominal output voltage (VOUT (nom) ) is the target output voltage of the part, as given by the output-voltage-option identifier. See Ordering Information

table for available options.

Note 11: Efficiency is measured versus VIN, with VIN being swept in small increments from 3.0V to 4.2V. The average is calculated from these measurements

results. Weighting to account for battery voltage discharge characteristics (VBAT vs. Time) is not done in computing the average.

Note 12: Turn-on time is measured from when the EN signal is pulled high until the output voltage crosses 90% of its final value.

Block Diagram

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