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LA5774 - Separately-Excited Step-Down Switching Regulator

Description

1.

Calculation equation to set the output voltage This IC controls the switching output so that the VOS pin voltage becomes 1.26V (typ).

The VOS pin has the inrush current of 1µA (typ).

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Ordering number : ENA0742 Monolithic Linear IC LA5774 www.DataSheet4U.com Separately-excited Step-down Switching Regulator (Variable Type) Overview The LA5774 is a Separately-excited step-down switching regulator (variable type). Functions • Low-ESR capacitor with increased reliability applicable as the output smoothing capacitor. • High efficiency. • Four external parts. • Time-base generator (160kHz) incorporated. • Current limiter incorporated. • Thermal shutdown circuit incorporated. • Soft start circuit incorporated. Specifications Parameter Maximum Input voltage Absolute Maximum Ratings at Ta = 25°C Symbol VIN max IO max VSW Pd max1 Pd max2 Operating temperature Storage temperature Topr Tstg No heat sink Infinite heat sink Conditions Ratings 30 3 -1 1.75 7.
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