LT6119IMS-2#PBF

Overview

The LT6119IMS-2#PBF is a high-side current sense amplifier featuring an integrated precision voltage reference and two latching comparators with power-on reset. It operates within a supply voltage range of 2.7V to 60V, drawing a typical supply current of 475µA at 2.7V. The device incorporates a current sense amplifier with a maximum input offset voltage of 200µV and a signal bandwidth of 1MHz. Comparator trip points are set by the internal 400mV reference or external resistors, offering a total threshold error of ±1.25%. The component is specified for operation from –40°C to 85°C and is housed in a 10-lead MSOP package.

Feature Summary

• Integrates a precision current sense amplifier, a 400mV reference, and two latching comparators with power-on reset capability.
• Features fast fault protection with a typical propagation delay of 1.4µs and a step response time of 500ns.
• Provides independent comparator inputs and outputs that function separately from the current sense amplifier.
• Supports wide supply ranges up to 60V with low offset voltage and gain error for accurate monitoring.

Applications

• Overcurrent, undercurrent, and fault detection
• Current shunt measurement
• Battery monitoring
• Motor control
• Automotive monitoring and control

Procurement Notes

Verify the specific suffix #PBF indicates lead-free finish and tube packaging when sourcing. Confirm the IMS designation corresponds to the industrial temperature grade of –40°C to 85°C rather than the extended automotive grade. Ensure compatibility with the 10-lead MSOP footprint during PCB layout. Cross-reference datasheet revision numbers to guarantee electrical characteristics match design requirements.

Selection Notes

Select the LT6119-2 variant specifically when both comparators require the same polarity configuration, such as dual overcurrent flags. Evaluate the required gain setting via external resistors RIN and ROUT to balance output swing against speed. Consider the 1MHz bandwidth for applications requiring rapid error detection in critical systems like motor control. Verify that the 400mV internal reference meets threshold accuracy needs without external components.

Part Context

This component belongs to the LT6119 family of complete high-side current sense devices. It shares architectural similarities with the LT6119-1 but differs in comparator polarity configuration. The device integrates functions typically found in separate amplifiers and logic circuits, simplifying system design for industrial and automotive environments requiring precise current monitoring.

Replacement Considerations

LT6119IMS-1#PBF: Identical package and temperature grade but features comparators with opposing polarity instead of the same polarity.

FAQ

How does the LT6119-2 differ from the LT6119-1 regarding comparator configuration?

The LT6119-2 has both comparators connected in the same polarity, whereas the LT6119-1 connects them in opposing polarity.

What is the function of the LE pin on the LT6119?

The LE (Latch Enable) pin controls the comparator latch functionality; when high, the latch is enabled, and when low, it is disabled.