Tom Hack ® + D1 1N4148W L1 3.3µH VIN 25V TO 60V C1 10µF 63V C2 220nF R3 232k T1 XFMR EFD20 C3 2.2µF 100V R4 47k D2 1A 60V B260A 12 11 R1 (OPT) VOUT1 12V 400mA C4 10µF FB 7 VOUT2 5V 400mA 6 R2 (OPT) 10 8 1 2 C5 47µF FB 9 4 + 5 3 C6 470µF 4V POSCAP VOUT3 3.3V 3A C7 100µF Q1 Si4490 LTC3806 12 RUN SENSE C12 11 220nF ITH NC 10 3 SS FB 9 4 G1 NC 8 5 G2 VIN 6 INTVCC GND 1 R6 12.4k + 20V 2 R7 33k C13 100µF 35V TANT C9 C8 100pF 1nF C14 220nF C15 4.7µF 10V + R8 0.033Ω Q2 Si7806DN Q3 Si7806DN C10 470µF 4V POSCAP VOUT4 2.5V 2A R5 (OPT) C11 100µF FB Q4 Si7806DN 13 R10 20.5k DN344 F01 FB R9 12.4k 08/04/344 EFFICIENCY (%) 90 85 80 OUTPUT 1 OUTPUT 2 OUTPUT 3 OUTPUT 4 Synchronous Nonsynchronous 7.86% 6.31% 1.39% 9.47% 8.88% (20%-100% of IMAX) 6.42% 2.43% 10.32% (20%-100% of IMAX) OUTPUT 1 OUTPUT 2 OUTPUT 3 OUTPUT 4 Swept* 0.87% (2.02%) 0.22% (0.42%) 0.29% (0.43%) 0.31% (0.94%) Swept 0.16% (0.23%) 0.17% (0.30%) –5.49% (–8.52%) –4.88% (–8.20%) Swept –4.43% (–8.61%) –0.63% (–0.36%) –0.12% (0.13%) 0.16% (0.39%) Swept* 75 10 20 30 40 50 60 70 80 90 100 % OF MAXIMUM OUTPUT POWER DN344 F02 * dn344f 0804 5.2K • PRINTED IN THE JAPAN LINEAR TECHNOLOGY CORPORATION 2004