参数资料
型号: LT3579EUFD-1#TRPBF
厂商: LINEAR TECHNOLOGY CORP
元件分类: 稳压器
英文描述: SWITCHING REGULATOR, PQCC20
封装: 4 X 5 MM, LEAD FREE, PLASTIC, MO-220, QFN-20
文件页数: 40/40页
文件大小: 503K
代理商: LT3579EUFD-1#TRPBF
LT3579/LT3579-1
9
35791f
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
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
相关PDF资料
PDF描述
LT3579IUFD-1#PBF SWITCHING REGULATOR, PQCC20
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