HIP1012 Datasheet, PDF (1/15 Pages) Intersil Corporation – Dual Power Distribution Controller

Data Sheet
HIP1012, HIP1012A
November 1999 File Number 4419.4
Dual Power Distribution Controller
The HIP1012 is a HOT SWAP dual supply power distribution
controller. Two external N-Channel MOSFETs are driven to
distribute power while providing load fault isolation.
At turn-on, the gate of each external N-Channel MOSFET is
charged with a 10µA current source. Capacitors on each
gate (see the Typical Application Diagram), create a
programmable ramp (soft turn-on) to control inrush currents.
A built in charge pump supplies the gate drive for the 12V
supply N-Channel MOSFET switch.
Over current protection is facilitated by two external current
sense resistors. When the current through either resistor
exceeds the user programmed value the controller enters the
current regulation mode. The time-out capacitor, C_TIM, starts
charging as the controller enters the time out period. Once
C_TIM charges to a 2V threshold, the N-Channel MOSFETs
are latched off. In the event of a fault at least three times the
current limit level, the N-Channel MOSFET gates are pulled
low immediately before entering time out period. The
controller is reset by a rising edge on either PWRON pin.
Choosing the voltage selection mode the HIP1012 controls
either +12V/5V or +3.3V/+5V supplies.
For those applications where voltage tolerance is a concern
the HIP1012A has a minimum nominal over current threshold
voltage of 50mV as compared to 100mV for the HIP1012.
Ordering Information
PART NUMBER
HIP1012CB
HIP1012ACB
HIP1012CB-T
HIP1012ACB-T
TEMP.
RANGE (^oC)
PACKAGE
-0 to 70 14 Ld SOIC
-0 to 70 14 Ld SOIC
Tape and Reel
PKG.
NO.
M14.15
M14.15
Features
• HOT SWAP Dual Power Distribution Control for +5V and
+12V or +5V and +3.3V
• Provides Fault Isolation
• Programmable Current Regulation Level
• Programmable Time Out
• Charge Pump Allows the Use of N-Channel MOSFETs
• Power Good and Over Current Latch Indicators
• Enhanced Over Current Sensitivity Available
• Redundant Power On Controls
• Adjustable Turn-On Ramp
• Protection During Turn-On
• Two Levels of Current Limit Detection Provide Fast
Response to Varying Fault Conditions
• Less Than 1µs Response Time to Dead Short
• 3µs Response Time to 200% Current Overshoot
Applications
• Redundant Array of Independent Disks (RAID) System
• Power Distribution Control
• Hot Plug™, Hot Swap Components
Pinout
HIP1012 (SOIC)
TOP VIEW
3/12VS 1
3/12VG 2
V_DD 3
MODE/ ₄
PWRON1
PWRON2 ⁵
5VG 6
5VS 7
14 3/12VISEN
13 R_ILIM
12 GND
11 C_PUMP
10 C_TIM
9 PGOOD
8 5VISEN
Typical Application Diagram
OPTIONAL
V_DD ^RFILTER
C_FILTER
C_PUMP
R_SENSE
12V
R_GATE
HIP1012
C_GATE
POWER ON
INPUTS
3/12VS3/12VISEN
3/12VG ^RILIM
V_DD
GND
M/PON1 ^CPUMP
PWRON2 ^CTIM
5V
R_GATE ^5VG
PGOOD
5VS
5ISEN
C_GATE
R_SENSE
R_LOAD
R_ILIM
C_TIM
5V OR 3.3V
R_LOAD
1
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
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