With most regulators, it is difficult to generate an output voltage that is less than the reference voltage. This note describes a way to use the MAX1864 to achieve an output voltage less than its 1.236V reference. The MAX1864 includes a positive linear regulator gain block. With a few external resistors, it can achieve an output voltage below 1.236V. Figure 1 shows the schematic of the implementation. Since the voltage at the FB pin is the reference voltage, a lower output voltage, VOUT1, is obtained if a voltage (V2) higher than the reference voltage is generated. Due to the high input impedance at the FB pin, if R5 is chosen to be equal to R6, we have V2-VFB = VFB-VOUT1, This yields V2 = 2VFB-VOUT1. To generate a 1.0V output voltage with VFB=1.236V, V2 should then be 1.472V. This can be achieved by properly choosing the resistance of R8 and R9: If R8 = 10k, then R9 will be 52.4k. Therefore, a 1.0V output voltage is generated. Figure 1. Schematic of 1.0V power supply with the MAX1864. 관련 부품   APP 906: Dec 27, 2001 MAX1864 xDSL/케이블 모뎀 3채널/5채널 출력 전원 전체 데이터 시트 (PDF, 380kB) 무료 샘플 자동 업데이트 관심 분야의 애플리케이션 노트가 나올 때 자동으로 업데이트를 원하십니까? 그렇다면 EE-Mail™을 신청하십시오. We Want Your Feedback! 의견을 보내주세요! 위 내용이 도움이 되셨나요? 여러분의 의견을 기다립니다 — Maxim은 보내주신 정정이나 제안사항을 반영하고 있습니다. 이 페이지를 평가하고 의견을 보내주십시오.   다운로드, PDF 형식 (34kB)  AN906, AN 906, APP906, Appnote906, Appnote 906