AP1511

Not Recommended for New Designs AP1511 PWM CONTROL 5A STEP-DOWN CONVERTER Features Input voltage: 3.6V to 23V Output voltage: 0.8V to VCC Duty ratio: 0% to 100% PWM control Oscillation frequency: 300KHz typ. Soft-start, Current limit, Enable function Thermal Shutdown function Built-in internal SW P-channel MOS Lead-Free Package: SOP-16L Lead Free Finish/RoHS Compliant (Note 1) Applications Microprocessor core supply Networking power supply Telecom power supply LCD MNT, TV power supply General Description AP1511 consists of step-down switching regulator with PWM control. These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc. AP1511 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to vary the duty ratio linearly from 0 up to 100%. This converter also contains an error amplifier circuit as well as a soft-start circuit that prevents overshoot at startup. An enable function, an over current protect function and a short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced from 300KHz to 30KHz. Also, an internal compensation block is built in to minimum external component count. With the addition of an internal P-channel Power MOS, a coil, capacitors, and a diode connected externally, these ICs can function as step-down switching regulators. They serve as ideal power suppl...