Features

• Order Custom Programmed Parts
• Supervises 6 Power Supplies
• I²C Adjustable UV and OV Trip Points
• Guaranteed Threshold Accuracy: ±1%
• I²C/SMBus Interface
• Internal EEPROM
• 256 Programmable Thresholds per Channel
• Up to Three Range Settings per Channel
• Two General Purpose Inputs
• Three General Purpose Inputs/Outputs
• Programmable Output Delays
• Supply Voltage Range, 3.4V to 13.9V
• Supply Voltage Power Sharing from V1 to V4
• 16-Lead 5mm × 4mm DFN and SSOP Packages
• LTpowerPlay Configuration and Development Tool

Typical Application

Description

The LTC®2933 is an EEPROM configurable voltage supervisor which can simultaneously monitor up to six power supply voltage inputs. Each voltage detector offers programmable over/undervoltage thresholds in various ranges and increments.

Two general purpose inputs (GPI) can be configured as programmable manual reset (MR), UV disable (UVDIS), margin (MARG) or auxiliary comparator (AUXC) inputs. Three general purpose pins (GPIO) can be configured for input or output operation. When configured as an input, a GPIO pin can be mapped to any other GPIO configured as output. The GPIO pins can also be configured as ALERT or fault outputs. Faults can be configured with programmable delay-on-release times. Output type and polarity are also configurable.

Status and history registers log faults and can be polled via the I²C interface. A fault log snapshot is also backed up in internal EEPROM. All parameters are programmable via the I²C interface. Configuration EEPROM supports autonomous operation without additional software.