AP3409A

A Product Line of Diodes Incorporated AP3409/A 3A, 4MHz HIGH EFFICIENCY SYNCHRONOUS BUCK CONVERTER Description Pin Assignments The AP3409/A is a current mode, PWM synchronous buck DC/DC converter, capable of driving a 3A load with high efficiency, excellent line and load regulation. It operates in continuous PWM mode. The AP3409/A integrates synchronous P-channel and N-channel power MOSFET switches with low on-resistance. It is ideal for portable applications powered from a single Li-ion battery. 100% duty cycle and low on-resistance P-channel internal power MOSFET can maximize the battery life. The switching frequency of AP3409/A can be programmable from 300kHz to 4MHz, which allows small-sized components, such as capacitors and inductors. A standard series of inductors from several different manufacturers are available. This feature greatly simplifies the design of switch-mode power supplies. The AP3409/A is available in U-DFN3030-10 package. Features  Input Voltage Range: 2.6V to 5.5V  Adjustable Output from 0.8V to 5V  0.8V Reference Voltage with ±2% Precision  Output Current: 3A  High Efficiency up to 95%  Low RDSON Internal Switches  Programmable Frequency: 300kHz to 4MHz  Current Mode Control  Forced Continuous-mode Operation  100% Duty Cycle  Built-in Soft-start  Built-in Short Circuit Protection  Built-in Thermal Shutdown Protection  Built-in Current Limit Function  PGOOD Output Voltage Monitoring (For AP3409A)  U-DFN3030-10 package  Totally Lead-...