优势供应 AX3122 AXElite代理 DC/DC降压IC

AX3122 5A Synchronous buck Converter

性能描述：

     AX3122 consists of step-down switching regulator with synchronous PWM converter.These devise include a reference voltage source, oscillation circuit, error amplifier, internalPMOS and external NMOS etc.

       AX3122 provides 5A high current, low-ripple power, high efficiency, and excellenttransient characteristics. The PWM control circuit is able to the duty ratio linearly form 0 upto 100%. 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 externalcompensation is easily to system stable.

       With the addition of internal PMOS, external NMOS, a coil and capacitors externally,these ICs can function as step-down switching regulators. The device serve 5A high powersupply system, the external NMOS can reduce IC temperature and promote systemefficiency for heavy load. Since this converter can accommodate an input voltage up to23V.

特点：

· Input voltage：4.5V to 23V

· Output voltage：VFBto VCC

· Duty ratio：0% to 100% PWM control

·Oscillation frequency：250KHz t*.

·Current Limit (CL).

·Thermal Shutdown function.

·Short Circuit Protect (SCP).

·Built-in internal P-channel MOS and drive external N-channel MOS.

·SOP-8L with Exposed Pad Pb-Free package.

典型应用电路图：

引脚图：

The package of AX3122 is SOP-8L-EP; the pin *ignment is given by: