数据手册：MAX1522, MAX1523, MAX1524 .pdf [英文Rev.1(PDF,444kB)]
{状况：生产中。}
The MAX1522/MAX1523/MAX1524 are simple, compact boost controllers designed for a wide range of DC-DC conversion topologies, including step-up, SEPIC, and flyback applications. They are for applications where extremely low cost and small size are top priorities. These devices are designed specifically to provide a simple application circuit and minimize the size and number of external components, making them ideal for PDAs, digital cameras, and other low-cost consumer electronics applications.
These devices use a unique fixed on-time, minimum off-time architecture, which provides excellent efficiency over a wide-range of input/output voltage combinations and load currents. The fixed on-time is pin selectable to either 0.5µs (50% max duty cycle) or 3µs (85% max duty cycle), permitting optimization of external component size and ease of design for a wide range of output voltages.
The MAX1522/MAX1523 operate from a +2.5V to +5.5V input voltage range and are capable of generating a wide range of outputs. The MAX1524 is intended for bootstrapped operation, permitting startup with lower input voltage. All devices have internal soft-start and short-circuit protection to prevent excessive switching current during startup and under output fault conditions. The MAX1522/MAX1524 have a latched fault mode, which shuts down the controller when a short-circuit event occurs, whereas the MAX1523 reenters soft-start mode during output fault conditions. The MAX1522/MAX1523/MAX1524 are available in a space-saving 6-pin SOT23 package.
产品关键特性
- Simple, Flexible Application Circuit
- 2-Cell NiMH or Alkaline Operation (MAX1524)
- Low Quiescent Current (25µA typ)
- Output Fault Protection and Soft-Start
- High Efficiency Over 1000:1 IOUT Range
- Pin-Selectable Maximum Duty Factor
- Micropower Shutdown Mode
- Small 6-Pin SOT23 Package
- No Current-Sense Resistor
| 应用与使用范围
- 工业+24V和+28V供电电源
- LCD偏置电源
- 低成本电池供电应用
- 低成本、大电流或高电压升压转换器
- 低成本、多输出反激式转换器
- SEPIC转换器
|
典型工作电路
芯片订购型号
| 订购型号 | 产品状态 | 封装形式 | 工作温度 | RoHS/无铅 |
| MAX1522EUT+ | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1522EUT+T | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1522EUT-T | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1523EUT+ | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1523EUT+T | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1523EUT-T | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1524EUT | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
| MAX1524EUT+ | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1524EUT+T | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：无铅材料分析 |
| MAX1524EUT-T | 生产中 | SOT；6引脚；9mm²封装信息 | -40°C至+85°C | RoHS/无铅：否材料分析 |
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