DESCRIPTION

The SP6128A is a fixed frequency, voltage mode, synchronous PWM controller designed to work from a single 5V or 3.3V input supply, providing excellent AC and DC regulation for high efficiency power conversion. Requiring only few external components, the SP6128A packaged in an 14-pin TSSOP, is especially suited for low voltage applications where cost, small size and high efficiency are critical. The operating frequency is internally set to 300kHz, allowing small inductor values and minimizing PC board space. The SP6128A drives two N-channel power MOSFETs for improved efficiency and includes an accurate 0.8V reference for low output voltage applications.

■ Optimized for Single Supply, 3V - 5.5V Applications

■ High Efficiency: Greater Than 95% Possible

■ Discontinuous Startup for Precharged Output

■ Accurate Fixed 300kHz Frequency Operation

■ Fast Transient Response

■ Internal Soft Start Circuit

■ Accurate 0.8V Reference Allows Low Output Voltages

■ Resistor Programmable Output Voltage

■ Resistor Programmable Overcurrent Threshold

■ Loss-less Current Limit with High Side RDS(ON) Sensing

■ Hiccup Mode Current Limit Protection

■ Dual N-Channel MOSFET Synchronous Driver

■ Quiescent Current: 500µA, 30µA in Shutdown

■ 14 pin TSSOP

APPLICATIONS

■ DSP

■ Microprocessor Core

■ I/O & Logic

■ Industrial Control

■ Distributed Power

■ Low Voltage Power