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HIP1013
Typical Performance Curves
102.5
(Continued)
10.2
V DD LOW TO HIGH
102.0
12 OC VTth
10.0
101.5
101.0
5 OC Vth
9.8
V DD HIGH TO LOW
100.5
-40
-20
0
20
40
60
80
9.6
-40
-30 -20 -10
0
10
20
30
40
50
60
70
80
TEMPERATURE (°C)
FIGURE 7. OC VOLTAGE THRESHOLD WITH = R ILIM 10k ?
HIP1013 Description and Operation
The HIP1013 offers the designer a cost efficient 5V and 12V
true hot plug controller. This device drives two external
N-Channel MOSFET switches and uses a charge pump to
provide ≈ 17V to drive the gate of the 12V supply switch. The
HIP1013 features Over Current (OC) programing with a
single external resistor, R ILIM and during turn-on, the gate
capacitor of each external N-Channel MOSFET is charged
with a 10 μ A current source. These capacitors create a
programmable ramp (soft turn-on).
Upon initial power up, the HIP1013 can either isolate the
voltage supply from the load by holding the external
N-Channel MOSFET switches off or apply the supply rail
voltage directly to the load for true hot swap capability. In
either case the HIP1013 turns on in a soft start mode
protecting the supply rail from sudden current loading.
The load currents pass through two external current sense
resistors. When the voltage across either resistor exceeds
the user programmed Over Current (OC) voltage threshold
value, (see Table 1) the HIP1013 controller turns both
N-Channel MOSFETs off in ≈ 2 μ s.
TABLE 1.
TEMPERATURE (°C)
FIGURE 8. POWER ON RESET VOLTAGE THRESHOLD
directly to V DD . Upon any OC or Under Voltage (UV)
condition the PGOOD fault indicating signal will pull low
when tied high through a resistor to the logic supply.
R ILIM RESISTOR
15K
10K
7.5K
4.99K
NOMINAL OC VTH
150mv
100mV
75mV
50mV
NOTE: Nominal OC Vth = R ILIM x 10 μ A
The HIP1013 is reset by a rising edge on either PWRON pin
and is turned on by either PWRON pin being driven low. The
HIP1013 can contro l either +12V/5V or +3.3V/+5V supplies.
Tying the PWRON1 pin to V DD , invokes the +3.3V/+5V
voltage mode. In this mode, the external charge pump
capacitor is not needed and C PUMP , pin 11 is also tied
6
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