
LTC1871EMS – WIDE INPUT RANGE, F
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The LTC1871EMS is a current mode boost, flyback, or SEPIC controller operating over a wide input voltage range, typically 2.5V to 36V, as suggested by the “WIDE INPUT RANGE” designation. It employs a constant frequency architecture, enabling predictable EMI performance. The “F” suffix likely denotes a specific frequency variant, although the precise switching frequency requires further datasheet verification. The EMS package indicates a thermally enhanced MSOP (Mini Small Outline Package), providing improved power dissipation capabilities compared to standard MSOP packages. External compensation allows for optimization of loop stability and transient response based on specific application requirements. The device incorporates undervoltage lockout (UVLO) and overvoltage protection (OVP) features to safeguard the circuit. Precise current sensing is achieved via an external sense resistor, facilitating accurate current limiting and control.