6 Pin Configuration and Functions

Sense Voltage: The voltage monitored by this pin is compared to the internal voltage threshold, V_th, that is determined by an internal voltage divider for fixed variants or an external voltage divider for adjustable variants. When the SENSE pin detects a fault, RESET/RESET asserts after the sense time delay, set by CTS. When the voltage on the SENSE pin transitions back past V_th and hysteresis, V_HYS, RESET/RESET deasserts after the reset time delay, set by CTR. For noisy applications, placing a 10 nF to 100 nF ceramic capacitor close to this pin may be needed for optimum performance.

Sensing Topology: Overvoltage (OV) or Undervoltage (UV)

Output Reset Signal: See Device Comparison for output topology options. RESET/RESET asserts when SENSE crosses the voltage threshold after the sense time delay, set by CTS. RESET/RESET remains asserted for the reset time delay period after SENSE transitions out of a fault condition. For active low open-drain reset output, an external pullup resistor is required. Do not place external pullup resistors on push-pull outputs.

Output topology: Open Drain or Push Pull, Active Low or Active High

LATCH: CTS functionality is disabled in latch capable devices. When latch mode is activated, RESET/RESET will not de-assert even if the fault is cleared. To activate latch mode, the LATCH pin has to be driven low, to at least 1.4V. It is recommended to have a 10k? pull-down to ground. To deactivate latch mode, a 2.1V or greater for 3μs has to be applied to the LATCH pin while SENSE pin is not detecting a fault. RESET/RESET will de-assert with delay t_ctr starting on the rising edge of the deactivating signal.

RESET Time Delay: User-programmable reset time delay for RESET/RESET. Connect an external capacitor for adjustable time delay or leave the pin floating for the shortest delay.

Manual Reset: If this pin is driven low, the RESET/RESET output will reset and become asserted. The pin can be left floating or be connected to a capacitor. This pin should not be driven high.

NC stands for “No Connect.” The pins are to be left floating.