HIP1013

FN4516 Rev 3.00

Page 6 of 7

August 2004

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 single

of each external N-Channel MOSFET is charged with a 10

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

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.

mode. In this mode, the external charge pump capacitor is not

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.

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

F) on the

output to eliminate unintended resets.

possibility of false over current occurrences. Ideally trace

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

TEMPERATURE (°C)

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

TEMPERATURE (°C)

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