2-411

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

HIP1013 features Over Current (OC) programing with a

capacitor of each external N-Channel MOSFET is charged

with a 10

µA 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

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 control either +12V/5V or +3.3V/+5V supplies.

voltage mode. In this mode, the external charge pump

condition the PGOOD fault indicating signal will pull low

when tied high through a resistor to the logic supply.

HIP1013 Application Considerations

There is no unique and specific HIP1013 application

evaluation board. Since the HIP1013 is pin compatible with

the HIP1012 device, you can substitute a HIP1013 for the

existing HIP1012 in either of the HIP1012EVAl1 or EVAL2

boards. Otherwise contact your Intersil Corporation sales

office and an already modified board will be provided.

Although pin compatible to the HIP1012, the HIP1013 is a

less featured dual power supply distribution controller and

does not include programmable current limiting regulation

and delay time to latch off.

Random resets can also occur if the HIP1013 (PINS 8 and

14) sense pins are pulled below ground when turning off a

highly inductive load. Place a large load capacitor (10-50

µF)

on the output to eliminate unintended resets.

the possibility of false over current occurrences. Ideally

VS and VISEN pins are direct and as short as possible with

zero current in the sense lines.

FIGURE 8. POWER ON RESET VOLTAGE THRESHOLD

20

40

60

80

-40

0

-20

12 OC VTth

5 OC Vth

102.5

102.0

101.5

101.0

100.5

-40

-20

0

20

40

60

80

-30

-10

10

30

50

70

10.2

10.0

9.8

9.6

TABLE 1.

NOMINAL OC VTH

15K

150mv

10K

100mV

7.5K

75mV

4.99K

50mV

CORRECT

INCORRECT

TO HIP1013

VS AND VISEN

TO HIP1013

VS AND VISEN

CURRENT

SENSE RESISTOR

HIP1013