Datasheet

200 mV (hysterisis)
OFF
ON
up to 65V
1.5V (typical)
0.5V (disabled)
0.8V (EN
THL
)
2.0V (EN
THH
)
disabled
EN
V
GS
Status
nPGD
V
TIMER
6 PA
11 PA
Fault Latch
V
GS
V
GATE-TH
transition region
V
TMRH
GATE pin will be
discharged to GND
at 80 mA rate
V
GS
= 5V
OFF
ON
V
GS
< 5V
V
GS
> 5V
V
TMRL
Fault
LM5060
www.ti.com SNVS628F –OCTOBER 2009–REVISED APRIL 2013
Figure 24. Voltages During Startup with V
DS
Fault Condition
ENABLE
The LM5060 Enable pin (EN) allows for remote On/Off control. The Enable pin on/off thresholds are CMOS
compatible. The external N-Channel MOSFET can be remotely switched Off by forcing the EN pin below the
lower input threshold, EN
THL
(800 mV). The external N-Channel MOSFET can be remotely switched On by
forcing the EN pin above the upper input threshold, EN
THH
(2.00V). Figure 25 shows the threshold levels of the
Enable pin.
When the EN pin is less than 0.5V (typical) the LM5060 enters a low current (disabled) state. The current
consumption of the VIN pin in this condition is 9 µA (typical).
Figure 25. Enable Function Threshold Levels
UNDER-VOLTAGE LOCK-OUT (UVLO)
The Under-Voltage Lock-Out function will turn off the external N-Channel MOSFET with a 2.2 mA (typical)
current sink at the GATE pin. Figure 26 shows the threshold levels of the UVLO input. A resistor divider as
shown in Figure 21 with R10 and R11 sets the voltage at which the UVLO function engages. The UVLO pin may
also be used as a second enable pin for applications requiring a redundant, or secondary, shut-down control.
Unlike the EN pin function, the UVLO function does not switch the LM5060 to the low current (disabled) state.
If the Under-Voltage Lock-Out function is not needed, the UVLO pin should be connected to the VIN pin. The
UVLO pin should not be left floating as the internal pull-down will keep the UVLO active.
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