Analog Devices / Maxim Integrated MAX17620 同步降压型直流-直流转换器
Maxim MAX17620同步降压型直流-直流转换器是高频、高效同步降压型直流-直流转换器。配有采用2.7V到5.5V输入电压工作的集成式MOSFET。支持最大 600mA 的负载电流和 1.5V - 100% VIN 输出电压。由于工作频率高，因此可使用小型、低成本电感器和电容器。
该器件在轻负载时具有可选PWM/跳跃工作模式，并且在PWM模式下能以4MHz固定频率工作。通过跳跃模式，可以提高高负载时的系统效率。PWM模式可以在整个负载中保持恒定的转换频率。在跳跃模式下，设备仅占用供电输入的40μA静态电流。在关断模式下，电流消耗低至0.1μA。
特性
- Minimizes external components, reducing total cost
- Synchronous operation for high efficiency and reduced cost
- Internal compensation for stable operation at any output voltage
- All-ceramic capacitor solution
- 4MHz operation
- Only five external components required
- Total solution size is 12mm2 (sum of the component's area)
- Wide 2.7V to 5.5V input voltage range
- Adjustable 1.5V to 100% VIN output voltage range
- Delivers up to 600mA load current
- 100% duty-cycle operation
- +1%/-0.75% reference voltage accuracy
- Reduces power dissipation
- Peak efficiency 91%
- Skip mode for high light-load efficiency
- Shutdown current = 0.1μA
- Operates reliably
- Peak current-limit protection
- Soft-start reduces inrush current during startup
- Built-in output-voltage monitoring (open-drain PGOOD Pin)
- -40°C to +125°C operation
- 2mm x 2mm TDFN-8 package
应用
- Battery-powered instruments
- Distributed power systems
- Point-of-Load power supplies
- Standard 5V rail supplies
框图
Typical Application Circuit
发布日期: 2016-01-26
| 更新日期: 2023-04-12