RENESAS HIP1011ACBZA

The HIP1011A is the second PCI hot-plug voltage bus control IC introduced by Intersil. It is a direct replacement for the widely used HIP1011, offering the same footprint, fit, and function, but with the added features of adjustable turn-off time and fault reporting for MOSFET switching. Like the HIP1011, the HIP1011A works together with discrete power MOSFETs and a few passive components to form a compact, simple, and complete power control solution. It controls four independent power rails: +5V, +3.3V, +12V, and -12V. The +12V and -12V switches are integrated. For the +5V and +3.3V rails, overcurrent (OC) protection is provided by sensing the voltage across an external current sense resistor; for the +12V and -12V rails, OC protection is provided internally. In addition, an on-chip reference voltage is used to monitor undervoltage (UV) conditions on the +5V, +3.3V, and +12V outputs. The PWRON input controls the switch states. When an OC condition occurs on any output, or a UV condition occurs on the +5V, +3.3V, or +12V outputs, the FLTN output is pulled low (0V) and all MOSFETs are latched off. The time between the FLTN signal going low and the MOSFETs being latched off is determined by a single capacitor from the FLTN pin to ground. This new feature allows the system OS to complete housekeeping activities in preparation for an unexpected shutdown of the affected card. The FLTN latch is cleared when the PWRON input is de-asserted low again. During initial power-up of the main VCC supply (+12V), the PWRON input is inhibited from turning on the switches, and the latch remains in the reset state until the VCC input exceeds 10V. The OC threshold, fault reporting response time, latch-off response time, and turn-on slew rate are all user-programmable. A resistor connected to the OCSET pin programs the OC threshold. A capacitor may be added to the FLTN pin to adjust the fault reporting delay time and the power latch-off time following an OC or UV event. A capacitor connected to the gate pin sets the turn-on rate. In addition, the HIP1011A has been enhanced to withstand stray system noise.

• Adjustable delay time for shutdown and fault reporting
• Controls all PCI supplies: +5V, +3.3V, +12V, -12V
• Internal MOSFET switches for +12V and -12V outputs
• Microprocessor interface for switching control and fault reporting
• Adjustable overcurrent protection for all supplies
• Fault isolation
• Adjustable turn-on slew rate
• Minimum component count solution
• No charge pump
• Lead-free package available (RoHS compliant)

• PCI Hot Plug
• CompactPCI