Datasheet LT3580 (Analog Devices) - 18

LT3580
APPLICATIONS INFORMATION
V –(V CESAT IN + ⏐VOUT⏐) C2 L1 L2 SW SWX V –V IN OUT Q1 D1 + C1 + C3 RLOAD 3580 F12
Figure 12. Switch-On Phase of an Inverting Converter. L1 and L2 Have Positive dI/dt
VIN + |VOUT|+ VD VD C2 L1 L2 SW SWX V –V IN OUT Q1 D1 + C1 + C3 RLOAD 3580 F13
Figure 13. Switch-Off Phase of an Inverting Converter. L1 and L2 Currents Have Negative dI/dt
L1 4.2μH D1 VOUT VIN 12V 5V C2 550mA VIN SW 10μF SHDN GND 130k LT3580 RT FB VC SYNC SS 10k C1 75k 0.1μF 2.2μF 1nF 3580 F14 C1: 2.2μF, 25V, X5R, 1206 C2: 10μF, 25V, X5R, 1206 D1: MICROSEMI UPS120 L1: SUMIDA CDR6D23MN-4R2
Figure 14. 1.2MHz, 5V to 12V Boost Converter
3580fg 18