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AX3130  2A  PWM 控制降压型转换器

性能描述

      AX3130 consists of step-down switching regulator with PWM control. These devise include a reference voltage source, oscillation circuit, error amplifier, internal PMOS and etc.

      AX3130 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%. The converter frequency can be set by outside resistance. The wide range is from 200K to 1.3MHz. AX3130 is build out soft start function that prevent inrush current and overshooting. A shutdown switch, over current protect and short circuit protect functions are built inside, and when SCP happens, the operation frequency will be reduced to 150K. Also, an

external compensation block is built in to good stable system.

      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 and SOP-8L with exposed pad packages, providing such outstanding as low current consumption. Since this converter can accommodate an input voltage up to 23V, it is also suitable for the operation via an AC adapter.

特点

u  输入电压：4.5V to 23V

u  输出电压：VFB to VCC

u  占空系数：0% to 100% PWM control

u  固定频率：200K~1.3MHz (Outside resistance setting)

u  过流保护和短路保护

u  外部软启动功能和关机功能

u  过热关断保护

u  内置开关 P 沟道MOS

u  SOP-8L 裸焊盘无铅封装