AP1534D - PWM Control 2A Step-Down Converter

AP1534D - PWM Control 2A Step-Down Converter

PWM CONTROL 2A STEP-DOWN CONVERTER

Input voltage: 4.4V to 18V
Output voltage: 0.8V to VCC
Duty ratio: 0% to 99% PWM control
Oscillation frequency: 300KHz typ.
Current limit, Enable function
Thermal Shutdown function
Built-in internal SW P-channel MOS
SOP-8L: Available in Green” Molding Compound (no Br, Sb)
Lead Free Finish/RoHS Compliant
AP1534 consists of step-down switching regulator with PWM control.
These devices include a reference voltage source, oscillation circuit, error amplifier, internal PMOS.
AP1534 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 99%.
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 50KHz. Also, an internal compensation block is built in to minimize 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 supply units for portable devices when coupled with the
SOP-8L mini-packages, providing such outstanding features as low current consumption. Since this converter can accommodate an input voltage up to 18V, it is also suitable for the operation via an AC adapter.