ncp3121 ON Semiconductor, ncp3121 Datasheet - Page 26

• Manufacturer Part Number: ncp3121
• Description: Dual 3.0 A, Step-down Dc/dc Switching Regulator
• Manufacturer: ON Semiconductor

channel only, the output voltage of the 2nd channel (slave)
decreases. After the overload condition ends, the slave
channel voltage remains low. If the slave channel should rise
when the OLM disappears, the configuration of the enable
and soft-start pins shown in Figure 51 must be used.
When hiccup overload mode is detected on the slave
Figure 49. Tracking Mode of Four Outputs -
Figure 47. Tracking Mode - Power-up
Power-up
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NCP3121
26
an SS1 capacitor with a value at least 10 times higher than
that of the SS2 capacitor.
For proper operation of the modified tracking mode, use
Figure 51. Augmented OLM in Tracking Mode
Figure 50. Tracking Mode of Four Outputs -
Figure 48. Tracking Mode - Power-down
EN2 pin
V
OUT1
Power-down
N-channel
transistor
4k7
N-channel
transistor
C
SS2
= 4n7
SS2 pin