SP6128A

® SP6128A Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters Low Voltage, Synchronous Step Down PWM Controller ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ ■ Optimized for Single Supply, 3V - 5.5V Applications GL 1 14 BST High Efficiency: Greater Than 95% Possible PVCC 2 13 GH VCC 3 Discontinuous Startup for Precharged Output 12 SWN SP6128A PGND 4 Accurate Fixed 300kHz Frequency Operation 11 ISET 14 pin TSSOP GND 5 10 VFB Fast Transient Response COMP 6 NC 9 Internal Soft Start Circuit NC 7 NC 8 Accurate 0.8V Reference Allows Low Output Voltages Now Available in Lead Free Packaging Resistor Programmable Output Voltage Resistor Programmable Overcurrent Threshold APPLICATIONS Loss-less Current Limit with High Side RDS(ON) ■ DSP Sensing ■ Microprocessor Core Hiccup Mode Current Limit Protection ■ I/O & Logic Dual N-Channel MOSFET Synchronous Driver ■ Industrial Control Quiescent Current: 500µA, 30µA in Shutdown ■ Distributed Power 14 pin TSSOP ■ Low Voltage Power 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 SP61...