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LT3581 Datasheet(PDF) 9 Page - Linear Technology |
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LT3581 Datasheet(HTML) 9 Page - Linear Technology |
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9 / 36 page  LT3581 9 3581fb For more information www.linear.com/LT3581 SHDN < 1.33V (TYPICAL) or VIN < 2.3V (TYPICAL) SHDN > 1.33V (TYPICAL) AND VIN > 2.3V (TYPICAL) FAULT DETECTED • SS CHARGES UP • IGATE OFF • FAULT PIN PULLED LOW INTERNALLY BY LT3581 • SWITCHER DISABLED • CLKOUT DISABLED SS < 50mV IF |VOUT| DROPS CAUSING: FB < 1.17V (BOOST) OR FB > 45mV (INVERTING) FAULT1 FAULT1 SS > 1.8V AND NO FAULT1 CONDITIONS STILL DETECTED SS < 50mV FAULT1 FAULT1 FAULT1 FAULT1 FAULT2 FAULT PIN > 1.0V FAULT1 = OVER VOLTAGE PROTECTION ON VIN (VIN > 22V MIN) OVER TEMPERATURE (TJUNCTION > 165°C) OVER CURRENT ON SW1 (ISW1 > 1.9A MIN) OVER VOLTAGE PROTECTION ON SW1 (VSW1 > 42V MIN) OVER VOLTAGE PROTECTION ON SW2 (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 PIN PULLDOWN RELEASED BY LT3581 • SS CONTINUES DISCHARGING TO GND 3581 SD STATE DIAGRAM Figure 2. State Diagram |
Similar Part No. - LT3581_15 |
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Similar Description - LT3581_15 |
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