SP6652

Solved by SP6652 TM 1A, High Efficiency, Fixed 1.4 MHz Current Mode PWM Buck Regulator Features ■ 1A Output Current ■ 1.4MHz Constant Frequency Operation ■ 97% Efficiency Possible ■ 0.5µA (Max.) Shutdown Current ■ Adjustable Output Voltage ■ No External FETs or Schottky Diode Required ■ Uses Small Value Inductors and Ceramic Output Capacitors ■ Low Dropout Operation: 100% Duty Cycle ■ Soft Start and thermal Shutdown Protection ■ Easy Frequency Synchonization ■ Lead Free, RoHS Compliant package: l Small (3mm X 3mm) 10 Pin DFN or MSOP P GND SGND FB COMP SD 1 2 3 4 5 10 LX SP6652 9 PVIN 10 Pin DFN 8S VIN 7 SYNC 6 MODE applications ■ Mobile Phones ■ PDAs ■ DSCs ■ MP3 Players ■ USB Devices ■ Point of Use Power DESCRIPTION The SP6652 is a high efficiency, synchronous buck regulator ideal for portable applications using one Li-Ion cell, with up to 1A of output current. The 1.4MHz switching frequency and PWM control loop are optimized for a small value inductor and ceramic output capacitor, for space constrained portable designs. In addition, the input voltage range of 2.7V to 5.5V; excellent transient response, output accuracy, and ability to transition into 100% duty cycle operation -- further extending useful battery life -- make the SP6652 a superior choice for a wide range of portable power applications. A logic level shutdown control, external clock synchronization, and forced-PWM or automatic control inputs are provided. Other features include soft-start,...