SMDMAX3108EWA (3.9mm Width) SOIC-08

PWM Control 3A Step-Down Converter

GENERAL DESCRIPTION
AX3108 consists of step-down switching regulator with PWM control. These devise
include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and
etc.
AX3108 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
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 short circuit protect
function are built inside, and when OCP or SCP happens, the operation frequency will be
reduced. 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 supply units for portable devices when coupled with the SOP-8L
package, providing such outstanding features as low current consumption. Since this
converter can accommodate an input voltage up to 20V, it is also suitable for the operation
via an AC adapter.
? FEATURES
- Input voltage:3.6V to 20V
- Output voltage:0.8V to VCC
- Duty ratio:0% to 100% PWM control
- Oscillation frequency:330KHz typ.
- Soft-start(SS), Current Limit(CL), Enable function.
- Thermal Shutdown function.
- Short Circuit Protect (SCP).
- Built-in internal SW P-channel MOS.
- Low ESR output capacitor (Multi-layer chip capacitor (MLCC)) application.
- SOP-8L Pb-Free package.

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