LX1681/1682
V O LTA G E - M O D E P W M C O N T R O L L E R S
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DESCRIPTION
The LX1681/1682 are monolithic, pulsewidth modulator controller ICs.
They are designed to implement a flexible, low cost buck (step-down)
regulator supply with minimal external components.
The LX1681 is a non-synchronous controller; the LX1682 has a synchronous driver for higher efficiency.
The output voltage is adjustable by means of a resistor divider to set the voltage between 1.
25V and 4.
5V.
Short-circuit current limiting can be implemented without expensive current sense resistors.
Current is sensed using the...