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LR1012 Datasheet(PDF) 6 Page - E-Tech Electronics LTD |
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LR1012 Datasheet(HTML) 6 Page - E-Tech Electronics LTD |
6 / 7 page LR1012 Preliminary CMOS IC UNISONICTECHNOLOGIESCO.,LTD 6 of 7 www.unisonic.com.tw QW-R502-495.a 1000 ÷ • Δ Δ × = Δ Δ ] ℃ / ppm [ V T V ] V )[ S ( V ] ℃ / mV [ T V OUT A OUT OUT A OUT 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. ΔVOUT1, ΔVOUT2 (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. ΔVOUT3 (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 R1 CIN GND VIN ON/OFF VSS VOUT VOUT Tr1 UTC LR1012L CL Output Current Boost Circuit CIN GND RL Load VIN VIN UTC LR1012L VSS ON/OFF VOUT VOUT IO Constant Current Circuit |
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