说明
MIC24055是一款具有独特自适应导通时间控制架构的恒定频率同步降压调节器。MIC24055在4.5V至19V的输入电源范围内工作,并提供高达12A的输出电流的调节输出。输出电压可调至0.8V,保证精度为±1%,设备的开关频率为600kHz。
Hyper Speed Control™架构可实现超快速瞬态响应,同时降低输出电容,还可实现(高VIN)/(低VOUT)操作。这种自适应tON纹波控制架构在单个设备中结合了固定频率操作和快速瞬态响应的优点。
MIC24055提供全套保护功能,确保在故障条件下对IC进行保护。其中包括低电压锁定以确保在功率暂降条件下正确运行,内部软启动以减少涌入电流,折返电流限制,“打嗝模式”短路保护和热关闭。提供了一个开漏电源良好(PG)引脚。另请参阅12A超轻负载®部分,MIC24056。
特性
- Hyper Speed Control™ architecture enables
- High delta V operation (VIN = 19V and VOUT = 0.8V)
- Small output capacitance
- Input voltage range: 4.5V to 19V
- Output current up to 12A
- Up to 95% efficiency
- Adjustable output voltage from 0.8V to 5.5V
- ±1% feedback accuracy
- Any Capacitor™ stable - zero-to-high ESR
- 600kHz switching frequency
- Power Good (PG) output
- Foldback current-limit and "hiccup" mode short-circuit protection
- Safe start-up into pre-biased loads
- -40°C to +125°C junction temperature range
- Available in 28-pin 5mm — 6mm QFN package
参数
类型 | 描述 |
Regulator Type | Step Down (Buck) |
Supported Output | 999999 |
Minimum Input Voltage (V) | 4 |
Maximum Input Voltage (V) | 19 |
Output Current (mA) Max | 12000 |
Maximum Frequency (kHz) | 999999 |
Vref (V) | 999999 |
Duty Cycle Min (%) | 999999 |
Duty Cycle Max (%) | 0.82 |
Switching Frequency (kHz) | 600 |
Input Voltage Range Min | 4.5 |
Input Voltage Range Max | 19 |
Output Current | 12000 |
Temp Range Min | -40 |
Temp Range Max | 125 |
Vout Min (V) | 0.8 |
Vout Max (V) | 5.5 |
Quiescent Current (mA) typ | 0.73 |
Light Load Efficiency Mode | No |
Switch current (A) typ | 999999 |
Automotive Rated | No |
Automotive Qualified | Yes |
SHUTDOWN Current (µA) (Typ) | 5 |
# of Outputs | 1 |
Vfb (V) | 0.8 |
Synchronous Rectifier | Yes |



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