说明
MIC28512是一款带有内部电源开关的同步降压开关稳压器,能够从4.6V至70V的宽输入电源范围提供高达2A的输出电流。输出电压可调至0.8V,保证精度为±1%。恒定的开关频率可以编程为200kHz到680kHz。Hyper Speed Control™和HyperLight Load®MIC28512的体系结构允许高V在(低VOUT)操作和超快的瞬态响应,同时减少所需的输出电容并提供非常好的轻负载效率。
MIC28512提供全套保护功能,确保在故障条件下提供保护。其中包括低电压锁定,以确保在功率暂降条件下正常运行,内部软启动,以减少涌入电流,折返电流限制,“打嗝”模式短路保护,以及热停堆。
特性
- 4.6V to 70V operating input voltage supply
- Up to 2A output current
- Integrated high-side and low-side N-channel MOSFETs
- HyperLight Load® (MIC28512-1) and Hyper Speed Control™ (MIC28512-2) architecture
- Enable input and power good (PGOOD) output
- Programmable current limit and foldback "hiccup" mode short-circuit protection
- Built-in 5V regulator for single-supply operation
- Adjustable 200kHz to 680kHz switching frequency
- Fixed 5ms soft-start
- Internal compensation and thermal shutdown
- Thermally enhanced 24-pin 3mm — 4mm FCQFN package
- Junction temperature range of -40°C to +125°C
参数
类型 | 描述 |
Max Duty Cycle (%) | 0.85 |
Input Voltage Range Max | 70 |
Input Voltage Range Min | 4.6 |
# of Outputs | 1 |
Output Current | 2000 |
Driver Type | Step Down (Buck) |
QuiescentCurrent | 0.4 |
Synchronous Rectifier | Yes |
Temp Range Max | 125 |
Temp Range Min | -40 |
VoutMax | 24 |
Vfb (V) | 0.8 |
VoutMin | 0.8 |
Vref (V) | 0 |



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