Datasheet

LM2611
SNOS965I –JUNE 2001–REVISED APRIL 2013 www.ti.com
Hysteretic Mode
As the output current decreases, there will come a point when the energy stored in the Cuk capacitor is more
than the energy required by the load. The excess energy is absorbed by the output capacitor, causing the output
voltage to increase out of regulation. The LM2611 detects when this happens and enters a pulse skipping, or
hysteretic mode. In hysteretic mode, the output voltage ripple will increase, as illustrated in Figure 19 and
Figure 20.
Figure 19. The LM2611 in PWM mode has very low Figure 20. At low loads, the LM2611 enters a
ripple
pulse-skipping mode. The output ripple
slightly increases in this mode.
Thermal Shutdown
If the junction temperature of the LM2611 exceeds 163°C, it will enter thermal shutdown. In thermal shutdown,
the part deactivates the driver and the switch turns off. The switch remains off until the junction temperature
drops to 155°C, at which point the part begins switching again. It will typically take 10ms for the junction
temperature to drop from 163°C to 155°C with the switch off.
10 Submit Documentation Feedback Copyright © 2001–2013, Texas Instruments Incorporated
Product Folder Links: LM2611