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LT3579 Datasheet(PDF) 9 Page - Linear Technology |
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LT3579 Datasheet(HTML) 9 Page - Linear Technology |
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9 / 42 page  LT3579/LT3579-1 9 35791fa For more information www.linear.com/LT3579 SHDN < 1.33V OR VIN < 2.3V SHDN > 1.33V AND VIN > 2.3V FAULT DETECTED • SS CHARGES UP • IGATE OFF • FAULT PULLED LOW INTERNALLY BY LT3579 • SWITCHER DISABLED • CLKOUT DISABLED SS < 50mV IF |VOUT| DROPS CAUSING: FB < 1.17V (BOOST) OR FB > 45mV (INVERTING) SS > 1.8V AND NO FAULT1 CONDITIONS STILL DETECTED SS < 50mV FAULT1 FAULT1 FAULT1 FAULT1 FAULT1 FAULT1 FAULT2 FAULT > 1.0V FAULT1 = OVER VOLTAGE PROTECTION ON VIN (VIN > 16.2V (MIN)) OVER TEMPERATURE (TJUNCTION > 165°C (TYP)) OVER CURRENT ON SW1 (ISW1 > 3.4A (MIN)) OVER VOLTAGE PROTECTION ON SW1 (VSW1 > 42V (MIN)) OVER VOLTAGE PROTECTION ON SW1 (VSW2 > 42V (MIN)) FAULT2 = FAULT PULLED LOW EXTERNALLY (FAULT < 0.75V) CHIP OFF • ALL SWITCHES DISABLED • IGATE OFF • FAULTS CLEARED INITIALIZE • SS PULLED LOW NORMAL MODE • NORMAL OPERATION • CLKOUT ENABLED WHEN SS > 1.8V SAMPLE MODE • Q1 & Q2 SWITCHES FORCED ON EVERY CYCLE FOR AT LEAST MINIMUM ON-TIME • IGATE FULLY ACTIVATED WHEN SS > 500mV SOFT START • IGATE ENABLED • SS CHARGES UP • SWITCHER ENABLED POST FAULT DELAY • SS SLOWLY DISCHARGES LOCAL FAULT OVER • INTERNAL FAULT PULLDOWN RELEASED BY LT3579 • SS CONTINUES DISCHARGING TO GND 35791 SD STATE DIAGRAM Figure 2. State Diagram |
Similar Part No. - LT3579_15 |
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Similar Description - LT3579_15 |
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