Figure 9-12. 5V Switch I-V Curve
9.3.3.3 PP_5V0 Current Sense
The current from PP_5V0 to VBUS is sensed through the switch and is available to be read digitally through the
ADC.
9.3.3.4 PP_5V0 Current Limit
The current through PP_5V0 to VBUS is limited to ILIMPP5V and is controlled automatically by the digital
core. When the current exceeds ILIMPP5V, the current-limit circuit activates. Depending on the severity of the
over-current condition, the transient response will react in one of two ways: Figure 9-13 and Figure 9-14 show
the approximate response time and clamping characteristics of the circuit for a hard short while Figure 9-15
shows the shows the approximate response time and clamping characteristics for a soft short with a load of 2 Ω.
Time (5 Ps/div)
Current (A)
Voltage (V)
-2 -1
0 0
2 1
4 2
6 3
8 4
10 5
12 6
D004
I VBUS
VBUS
Figure 9-13. PP_5V0 Current Limit with a Hard Short
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TPS65982
SLVSD02E – MARCH 2015 – REVISED AUGUST 2021
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