微桥提供AX5201*A+PT1102*OP升压降压IC

AX5201-Step-up PWM DC/DC ConverterDataSheet

GENERAL D*CRIPTION
The AX5201 is high efficient step-up DC/DC converter. Large output current is possible having a built in internal N channel MOSFET, and using an external coil and diode.
The AX5201 can be operated at switching frequencies of 500 kHz allowing for easy filtering and low noise, the size of the external components can be reduced.
Output voltage is programmable with 1.0V of standard voltage supply internal, and using externally connected components, output voltage (FB) can be set up at will. The soft-start time can be programmed by outside capacitor; the function prevents overshoot at startup. Build inside Current limit, Thermal Shutdown and enable functions.

FEATUR*
- Input voltage：3V to 20V
- Output voltage：3.3V to 32V
- Duty ratio：0% to 85% PWM control
- Oscillation frequency：500KHz.
- Enable and Thermal Shutdown function.
- Internal Current limit.
- Built-in N-channel MOSFET
- SOP-8L with Exposed pad Pb-Free package.

PT1102-Step Down DC/DC Converter

PT1102是一款集*MOSFET的PWM降压DC/DC转换器。它能*1A连续输出电流而且能在一个很宽的输入电压范围内工作并保持优良的负载和线调整率。PT1102包含一个误差放大器、相位补偿电路，PWM比较器、软启动电路,故障保护电路和功率MOS管。其中故障保护电路包括电流限制和热保护电路,两者配合使电路不至于烧毁。此外,当输入电压小于或等于内置UVLO的阈值时,欠压锁定功能被触发,使IC处于待机状态,并避免不稳定的操作。*要几个外部元件,该IC很容易构成一个输出电压可调的低纹波*率的降压型DC/DC转换器。
特点Features: ﹡工作电压2.5V~18V ﹡内置高功率MOS管，达1A持续输出电流 ﹡内置软启动功能 ﹡*大占空比100% ﹡*输出电压: ?% ﹡输出电压低温度系数：典型为?00ppm/℃ ﹡*关断电流：0.1μA ﹡低静态电流：典型为100uA ﹡*率: 典型值90% ﹡固定开关频率: 500KHz ﹡内部限流和过热关断 ﹡封装形式: SOP-8	应用Applications: ﹡手持通讯设备,VCR,摄象机等视频设备,电池供电设备和家用电器设备等
	>>>PT1102 中文简介:
	>>>PT1102 Data Sheet:

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