LT1938EDD#PBF (LINEAR TECHNOLOGY)

The LT1938EDD#PBF is an adjustable frequency monolithic buck Switching Regulator accepts input voltage up to 25V. A high efficiency 0.18R switch is included on the die along with a boost Schottky diode and the necessary oscillator, control and logic circuitry. Current-mode topology is used for fast transient response and good loop stability. The LT1938's high operating frequency allows the use of small, inductors and ceramic capacitors resulting in low output ripple while keeping total solution size to a minimum. The low current shutdown mode reduces input supply current to less than 1µA while a resistor and capacitor on the RUN/SS pin provide a controlled output voltage ramp (soft-start). A power good flag signals when VOUT reaches 90% of the programmed output voltage.