SP6122

® SP6122 Low Voltage, Micro 8, PFET, Buck Controller Ideal for 1A to 5A, Small Footprint, DC-DC Power Converters ■ Optimized for Single Supply, 3V-5.5V Applications ■ High Efficiency, Greater than 90% Possible ■ 20ns/1nF PFET Output Driver ■ Fast Transient Response ■ Open Drain Fault Output Pin VCC 1 FFLAG 2 VOUT 3 SP6122 8 Pin MSOP 8 PDRV 7 GND 6 ISET ■ Internal Soft Start Circuit ■ Accurate 1.5% Reference ENABLE 4 5 ISENSE ■ Programmable Output Voltage or Fixed 1.5V Output ■ Loss-less Adjustable Current Limit with High side Now Available in Lead Free Packaging RDS(ON) Sensing ■ Hiccup or Lock-up Fault Modes ■ Low 5µA Sleep Mode Quiescent Current ■ Low 300µA Protected Mode Quiescent Current ■ Ultra Low, 150µA Unprotected Mode Quiescent Current ■ High Light Load Efficiency ■ Offered in Tiny 8 pin MSOP Package APPLICATIONS ■ Video Cards ■ High Power Portable ■ Microcontrollers ■ I/O & Logic ■ Industrial Control ■ Distributed Power ■ Low Voltage Power DESCRIPTION The SP6122 is a PWM/PFM minimum on-time controller designed to work from a single 3V5.5V input supply. It is engineered specifically for size and minimum component count, simplifying the transition from a linear regulator to a switcher solution. However, unlike other “micro” parts, the SP6122 has an array of value added features such as optional hiccup mode, over current protection, TTL enable, “jitter and frequency stabilization” and a fault flag pull-down pin. Combined with reference and driver spe...