SMB119N View Datasheet(PDF) - Summit Microelectronics
Part Name
Description
MFG CO.
'SMB119N' PDF : 34 Pages View PDF
VOLTAGE AND CURRENT WAVEFORMS (CONTINUED)
SMB119
Figure 7: Pulse skipping on LSDRV pin while in
PFM mode of operation. Switching frequency is
proportional to load.
Time/Horizontal division = 1ms
Ch 1(2V/Div) = LSDRV output (Yellow trace)
Ch 4 (50mA/Div) = 150mA load step (Green trace)
Figure 8: Pulse skipping on LSDRV pin while in
PFM mode of operation. Switching frequency is
proportional to load.
Time/Horizontal division = 200µs
Ch 1(2V/Div) = LSDRV output (Yellow trace)
Ch 4 (50mA/Div) = 150mA load step (Green trace)
Figure 9: Pulse skipping on LSDRV for light load
PFM operation
Time/Horizontal division = 4µs
Ch 1(2V/Div) = LSDRV output (Yellow trace)
Figure 10: Forced PWM operation.
Time/Horizontal division = 4µs
Ch 1(2V/Div) = LSDRV output (Yellow trace)
Summit Microelectronics, Inc
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