HIP1013(1999) データシートの表示（PDF） - Intersil
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HIP1013 Datasheet PDF : 7 Pages
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HIP1013
Pin Description
PIN NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
SYMBOL
12VS
12VG
VDD
MODE/
PWRON1
PWRON2
5VG
5VS
5VISEN
PGOOD
CPUMP
GND
RILIM
12VISEN
FUNCTION
DESCRIPTION
12V Source
Connect to source of associated external N-Channel MOSFET switch to sense output
voltage.
12V Gate
Connect to the gate of associated N-Channel MOSFET switch. A capacitor from this
node to ground sets the turn-on ramp. At turn-on this capacitor will be charged to ≈17.4V
by a 10µA current source when in 5V/12V mode of operation, otherwise capacitor will be
charged to ≈11.4V.
Chip Supply
Connect to 12V supply. This can be either connected directly to the +12V rail supplying
the load voltage or to a dedicated VDD +12V supply.
Power ON/ Reset invokes
3.3V operation when
shorted to VDD, Pin 3.
Power ON/Reset
PWRON1 and PWRON2 are used to turn-on and reset the chip. Both outputs turn-on
when either pin is driven low. After an over current limit fault, the chip is reset by the rising
edge of a reset signal applied to either PWRON pin. Each input has 100µA pull up
capability which is compatible with 3V and 5V open drain and standard logic. PWRON1
is also used to invoke 3.3V control operation in preference to +12V control. By tying pin
4 to pin 3 the charge pump is disabled and the UV threshold also shifts to ≈2.8V.
5V Gate
Connect to the gate of the external 5V N-Channel MOSFET. A capacitor from this node
to ground sets the turn-on ramp. At turn-on this capacitor will be charged to ≈11.4V by a
10µA current source.
5V Source
Connect to the source side of 5V external N-Channel MOSFET switch to sense output
voltage.
5V Current Sense
Connect to the load side of the 5V sense resistor to measure the voltage drop across this
resistor between 5VS and 5VISEN pins.
Power Good Indicator
PGOOD is driven by an open drain N-Channel MOSFET. It is pulled low when either
output voltage is not within specification or and OC condition exists.
No Connection.
Charge Pump Capacitor
Chip Ground
Connect a 0.1µF capacitor between this pin and VDD (Pin 3).
Current Limit Set Resistor
A resistor connected between this pin and ground determines the current level at which
current limit is activated. This current is determined by the ratio of the RILIM resistor to
the sense resistor (RSENSE). The current at current limit onset is equal to
10µA x (RILIM/RSENSE).
12V Current Sense
Connect to the load side of sense resistor to measure the voltage drop across this
resistor.
2-408
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