LM3488MM/NOPB National Semiconductor, LM3488MM/NOPB Datasheet - Page 13

• Manufacturer Part Number: LM3488MM/NOPB
• Description: IC CTRLR SWITCH REG N-CH 8-MSOP
• Manufacturer: National Semiconductor
• Type: Step-Up (Boost), Flyback, Sepicr

Specifications of LM3488MM/NOPB

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: Adj to 1.26V
• Current - Output: 1A
• Frequency - Switching: 100kHz ~ 1MHz
• Voltage - Input: 2.97 ~ 40 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 8-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: LM3488MM; LM3488MM; LM3488MMTR

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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