LM3488QMM National Semiconductor, LM3488QMM Datasheet - Page 13

• Manufacturer Part Number: LM3488QMM
• Description: LM3488/LM3488Q High Efficiency Low-Side N-Channel Controller for Switching Regulators; Package: MINI SOIC; No of Pins: 8; Container: Reel
• Manufacturer: National Semiconductor

SHORT-CIRCUIT PROTECTION
When the voltage across the sense resistor (measured on
I
SEN
Pin) exceeds 350mV, short-circuit current limit gets acti-
FIGURE 8. Shutdown Operation in Frequency Adjust Mode
FIGURE 9. Shutdown Operation in Synchronization Mode
FIGURE 7. Frequency Synchronization
13
vated. A comparator inside LM3488 reduces the switching
frequency by a factor of 5 and maintains this condition till the
short is removed.
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