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UMC33167L-TB5-T Datasheet(PDF) 6 Page - Unisonic Technologies |
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UMC33167L-TB5-T Datasheet(HTML) 6 Page - Unisonic Technologies |
6 / 8 page UMC33167 Advance LINEAR INTEGRATED CIRCUIT UNISONICTECHNOLOGIESCO.,LTD 6 of 8 www.unisonic.com.tw QW-R103-070.c TYPICAL APPLICATION CURRENT CIN 330μF VIN 12V + - + VO 5.05V/5.0A EA + - + - - + S Q R Oscillator + UVLO 4 2 1 5 3 PWM ILIMIT 100μA 120 5.50V Reference Thermal Shutdown D1 1N5825 L 190uH + + CF RF 0.1uF 68K R1 + R2 6.8K CO 4700uF + PWM Latch GND COMP FB SW VCC The Step-Down Converter application is shown in Figure 3. The output switch transistor Q1 interrupts the input voltage, generating a squarewave at the LCO filter input. The filter averages the squarewaves, producing a dc output voltage that can be set to any level between VIN and VREF by controlling the percent conduction time of Q1 to that of the total oscillator cycle time. If the converter design requires an output voltage greater than 5.05V, resistor R1 must be added to form a divider network at the feedback input. |
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