SNVSAZ0C March 2018 – October 2021 LM51501-Q1
PRODUCTION DATA
Refer to the PDF data sheet for device specific package drawings
The LM51501-Q1 runs at fixed switching frequency without any pulse skipping in SS configuration. The device turns on the LO driver every cycle with TON-MIN until it enters standby mode, which helps to prevent EMI spectrum shifts. Because the MOSFET turns on every cycle, the boost converter output may be above the regulation target if the required on-time is less than the TON-MIN when the boost supply voltage is close to the VOUT regulation target or the load current is very small. The output voltage will rise above the VOUT regulation target if the one of the inequalities listed in Equation 10 or Equation 11 is true.
In SS configuration, the LM51501-Q1 enters into the standby mode if VOUT is greater than the VOUT standby threshold—which is 24% higher than the VOUT regulation target—or if VIN is greater than the VIN standby threshold.