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, over current protection and 140oC over-temperature shutdown.

特性 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

applications

■ Mobile Phones

■ PDAs

■ DSCs

■ MP3 Players

■ USB Devices

■ Point of Use Power