LR1012 datasheet(5/6 Pages) UTC

5 / 6 page

LR1012

CMOS IC

UNISONICTECHNOLOGIESCO.,LTD

5 of 6

www.unisonic.com.tw

QW-R502-495.G



TERMS

CL (Output capacitors)

Cause the UTC LR1012L series can provide stable operation without CL.So the CL are used only to improve

transient response characteristics.And when CL is used, a low ESR (Equivalent Series Resistance) capacitor like

ceramic capacitor can also be used. CL can hence be removed in applications when transient response can be

negligible.

VOUT (Output voltage)

Unless the under conditions change, the accuracy of the output voltage is ±2.0% guaranteed under the specified

conditions for input voltage, which differs depending upon the product items, output current, and temperature.

∆VOUT1, ∆VOUT2 (Line regulations 1 and 2)

After a change in the input voltage with the output current remained unchanged, these values show how much

the output voltage changes.

∆VOUT3 (Load regulation)

After a change in the output current with the input voltage remained unchanged, these values show how much

the output voltage changes.

Dropout voltage (Vdrop)

When output voltage falls to 98% of VOUT (E) by gradually decreasing the input voltage (VIN), this value shows the

difference between the input voltage (VIN1) and the output voltage. Vdrop=VIN1-[VOUT (E)×0.98]



APPLICATION CIRCUIT

VIN

CIN

GND

VIN

ON/OFF

VSS

VOUT

Tr1

UTC LR1012L

Output Current Boost Circuit

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