HIP1011B is the third product in the HIP1011 family and is an electronic circuit breaker that monitors, reports and protects circuits from excessive load currents. As a pin-for-pin drop-in alternative offering similar functionality to the widely used HIP1011, the HIP1011B is compatible with CompactPCI peripheral boards and PCI Hot Plug systems where voltage “health” monitoring and reporting are centralized by the system controller IC. The HIP1011B does not monitor nor respond to under voltage conditions thus making control of a wide range of voltages possible. The HIP1011B creates a small and simple yet complete power control solution to control the four independent supplies (+5V, +3.3V, +12V, and -12V) found in PCI and CompactPCI systems. For the +12V and -12V supplies, overcurrent protection is provided internally with integrated current sensing FET switches. For the +5V and +3.3V supplies, overcurrent protection is provided by sensing the voltage across the external current-sense resistors. The PWRON input controls the state of both internal and external switches. During an overcurrent condition on any output, all MOSFETs are latched-off and a LOW (0V) is asserted on the FLTN output. The FLTN latch is cleared when the PWRON input is toggled 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 is held in the Reset state until the VCC input is greater than VCCREF.
The HIP1011B is a drop‑in replacement for the HIP1011, providing centralized voltage monitoring and fault reporting for CompactPCI and PCI Hot‑Plug systems. It controls four independent supplies (+5 V, +3.3 V, +12 V, –12 V) and offers internal MOSFET switches for the ±12 V rails while the +5 V and +3.3 V rails use external current‑sense resistors.
Key features include adjustable delay to fault notification, programmable over‑current thresholds via the OCSET pin, a fault output (FLTN) that latches off all switches, and a PWRON input that globally enables or disables the four power switches. The device is RoHS‑compliant and available in Pb‑free packages.
| Supply Voltage Range (VCC) | +10.8 V to +13.2 V |
|---|---|
| Operating Temperature Range (Ta) | 0 °C to 70 °C |
| Overcurrent Fault Response Time | 500 ns to 960 ns |
| PWRON Threshold Voltage | typical 1.6 V |
A resistor connected from the OCSET pin to ground programs the over‑current trip point for all four switches.
The PWRON pin controls all four switches; a high level turns them on, while a low level turns them off.
FLTN is a fault output that goes low when a fault occurs, latching off all power switches until reset.