ACT8310

ACT8310 / ACT8311 1.5A, PWM Step-Down DC/DCs in TDFN FEATURES Multiple Patents Pending Up to 95% High Efficiency Up to 1.5A Guaranteed Output Current (ACT8311) 1.35MHz Constant Frequency Operation Internal Synchronous Rectifier Eliminates Schottky Diode ACT8310: Up to 1.2A ACT8311: Up to 1.5A 100% Duty Cycle Low-Dropout Operation 0.1µA Shutdown Current Small TDFN33-8 Package  RoHS-Compliant Enable/Disable Control Minimal External Components APPLICATIONS Wireless Handhelds Portable Devices GPS/PND equipment SYSTEM BLOCK DIAGRAM GENERAL DESCRIPTION The patent-pending ACT8310/ACT8311 are currentmode, fixed-frequency PWM, synchronous step-down DC/DC converters that are capable of delivering 1.5A with efficiency of up to 95%. These devices operate with a fixed frequency of 1.35MHz, minimizing noise in sensitive equipment as well as optimizing both efficiency and component size and cost. These devices feature very low-resistance power MOSFET and 100% duty cycle operation, making them ideal choices for portable applications requiring a 3.0V or 3.3V rail to be generated from a Li+ battery. The ACT8311 is capable of supplying up to 1.5A of output current, while the ACT8310 is capable of supplying up to 1.2A, respectively. All three devices have adjustable output voltages that are programmable down to 1.2V. Contact Qorvo for custom fixed output voltage availability. 2.7V to 5.0V ON OFF Power-OK Output IN SW ACT8311 EN FB POK GP G VOUT Up to 1.5A...