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HIP1012A
Electrical Specifications
V DD = 12V, C VG = 0.01 μ F, C TIM = 0.1 μ F, R SENSE = 0.1 ? , C BULK = 220 μ F, ESR = 0.5 ? ,
T A = T J = 0°C to 70°C, Unless Otherwise Specified (Continued)
PARAMETER
Gate Turn-On Current
3X Gate Discharge Current
5V Undervoltage Threshold
3.3V Undervoltage Threshold
3.3/5VG High Voltage
SYMBOL
I ON5V
3XdisI
5V VUV
3.3V VUV
3/5VG
TEST CONDITIONS
C VG = 0.01 μ F
C VG = 0.01 μ F, PWRON = Low
MIN
8
0.5
4.35
2.65
11.2
TYP
10
0.75
4.5
2.8
11.9
MAX
12
-
4.65
2.95
-
UNITS
μ A
A
V
V
V
SUPPLY CURRENT AND IO SPECIFICATIONS
V DD Supply Current
V DD POR Rising Threshold
V DD POR Falling Threshold
I VDD
4
9.5
9.3
8
10.0
9.8
10
10.7
10.3
mA
V
V
Current Limit Time-Out
PWRON Pull-up Voltage
PWRON Rising Threshold
PWRON Hysteresis
PWRON Pull-Up Current
Current Limit Time-Out Threshold (C TIM )
C TIM Charging Current
C TIM Discharge Current
C TIM Pull-Up Current
R ILIM Pin Current Source Output
Charge Pump Output Current
Charge Pump Output Voltage
Charge Pump Output Voltage - Loaded
Charge Pump POR Rising Threshold
Charge Pump POR Falling Threshold
T ILIM
PWRN_V
PWR_Vth
PWR_hys
PWRN_I
C TIM _Vth
C TIM _I
C TIM _disI
C TIM _disI
R ILIM _Io
Qpmp_Io
Qpmp_Vo
Qpmp_VIo
Qpmp+Vth
Qpmp-Vth
C TIM = 0.1 μ F
PWRON pin open
V CTIM = 8V
C PUMP = 0.1 μ F, C PUMP = 16V
No load
Load current = 100 μ A
16
1.8
1.1
0.1
60
1.8
8
1.7
3.5
90
320
17.2
16.2
15.6
15.2
20
2.4
1.5
0.2
80
2
10
2.6
5
100
560
17.4
16.7
16
15.7
24
3.2
2
0.3
100
2.2
12
3.5
6.5
110
800
-
-
16.5
16.2
ms
V
V
V
μ A
V
μ A
mA
mA
μ A
μ A
V
V
V
V
HIP1012A Description and Operation
The HIP1012A is a multifeatured dual power supply
distribution controller, including programmable current
limiting regulation and time to latch off. Additionally the
HIP1012A operates both as a +3.3V and 5V or a +5V and
+12V power supply controller with each mode having
appropriate UnderVoltage (UV) fault notification levels.
Upon initial power up HIP1012A 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 HIP1012A turns on in a soft start mode
protecting the supply rail from sudden current loading. If
either PWRON pin is pulled low the HIP1012A will be in
true hot swap mode. Both PWRON pins must be high to
turn off the HIP1012A thus isolating the power supply from
the load through the external FETs.
At 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). A
charge pump supplies the gate drive for the 12V supply
switch driving that gate to 17V.
The load currents pass through two external current sense
resistors. When the voltage across either resistor exceeds
the user programmed Overcurrent (OC) voltage threshold
value, (see Table 1) the controller enters current regulation.
At this time the time-out capacitor, C TIM , starts charging with
a 10 μ A current source and the controller enters the time out
period. The length of the time out period is set by the single
external capacitor (see Table 2) placed from the C TIM pin
(pin 10) to ground and is characterized by a lowered gate
drive voltage to the appropriate external N-Channel
MOSFET. Once C TIM charges to 2V, an internal comparator
is tripped resulting in both N-Channel MOSFETs being
latched off.
5
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