LR1108-33-AF5-R datasheet(5/6 Pages) UTC

5 / 6 page

LR1108

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 6

www.unisonic.com.tw

QW-R102-031.B

ELECTRICAL CHARACTERISTICS(Cont.)

Note 1. Conditions for which the device is intended to be functional is indicated by operating ratings, but specific

performance limits isn’t be guaranteed. To make sure of specifications and test conditions, read Electrical

Characteristics. Only for the test conditions listed the guaranteed specifications can be applied. When the

device is not operated under the listed test conditions some performance characteristics may degrade.

2. Devices must be derated based on package thermal resistance at elevated temperatures.

3. The most likely parametric norm represents at 25℃.

4. The LR1108 output must be diode-clamped to ground. If used in a dual-supply system where the regulator

load is returned to a negative supply.

5. Between the VIN and VOUT terminals the output PMOS structure contains a diode. This diode is reverse

biased normally. If the voltage at the output terminal is forced to be higher than the voltage at the input

terminal this diode will get forward biased. This diode can withstand 1Amp of peak current and 200mA of DC

current typically.

6. Output voltage line regulation is the change in output voltage from the nominal value which is due to change

in the input line voltage. Which is defined as the change in output voltage from the nominal value due to

change in load current is output voltage load regulation. The load regulation and line regulation specification

include the typical number only. But, the limits for load and line regulation are included in the output voltage

tolerance specification.

7. Error Flag hysteresis and threshold are specified as regulated output voltage’s percentage.

8. At which the output drops 2% below the normal value dropout voltage is defined as the minimum input to

output differential voltage. Only to output voltages of 2.5V and above dropout voltage specification applies.

For output voltages below 2.5V, since the minimum input voltage is 2.5V, the drop-out voltage is nothing but

the input to output differential.

9. Specification has been tested at −40℃ ≤ TJ ≤ 85℃cause under shutdown conditions the temperature rise of

the device is negligible.

10. The minimum operating VIN value is equal to [VOUT(NOM) + VDROPOUT] or 2.5V, just the greater.

LR1108-33-AF5-R 데이터시트(PDF) 5 Page - Unisonic Technologies