APE1811

Advanced Power Electronics Corp. FEATURES Input Voltage : 8V to 40V Output Voltage : 3.3V to 38V Duty Ratio : 0% to 100% PWM Control Oscillation Frequency Range is 50K~350KHz by Outside Resistance Setting Enable with Soft-Start Function Current Limit, Short Circuit Protect (SCP) and Thermal Shutdown Protection Built-in Internal SW P-channel MOS. ESOP-8 & PDIP-8 Pb-Free Package APE1811 PWM CONTROL 3A STEP-DOWN CONVERTER DESCRIPTION APE1811 consists of step-down switching regulator with PWM control. These devise include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc. APE1811 provides low-ripple power, high efficiency, and excellent transient characteristics. The PWM control circuit is able to the duty ratio linearly form 0 up to 100%. This converter is build out soft start function that prevents overshoot and inrush current at startup. An over current protect function and short circuit protect function are built inside, and when OCP or SCP happens, the operation frequency will be reduced. The operating frequency is decided by outside resistance. An external compensation is easily to system stable; the low ESR output capacitor can be used. 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 supply units for portable devices when coupled with the ESOP-8 packages, providing such outstanding features as...