说明
MIC2164/-2/-3/C是具有自适应导通时间控制功能的恒定频率同步降压控制器。MIC2164/-2/-3/C是新型Hyper-Speed Control™降压控制器系列中的首批产品。
MIC2164/-2/-3/C控制器在3V至28V的输入电源范围内工作,与IC电源电压无关。这些装置能够提供25A的输出电流。MIC2164工作频率为300kHz,MIC2164-2工作频率为600kHz,MIC2164-3工作频率为1MHz。
独特的Hyper Speed Control™架构可实现超快的瞬态响应,同时降低输出电容,还可实现高V在/低VOUT操作可能。MIC2164/-2/-3/C控制器采用了一种自适应的体系结构在波纹控制。提供UVLO特征以确保在功率暂降条件下的正确操作,从而防止外部功率MOSFET过热。提供了一种软启动特征以减少涌入电流。折返电流限制和“打嗝”模式短路保护确保FET和负载保护。
MIC2164/-2/-3/C控制器采用10引脚MSOP(MAX1954A兼容)封装,结操作范围从-40°C到+125°C。
特性
- Hyper Speed Control™ architecture enables
- High delta V operation (V HSD=28V and V OUT=0.8V)
- Smaller output capacitors than competitors
- 3V to 28V input voltage
- Any Capacitor™ stable
- Zero ESR to high ESR
- 25A output current capability
- 300kHz/600kHz/1MHz switching frequency
- Adaptive on-time mode control
- Adjustable output from 0.8V to 5.5Vwith ±1% (MIC2164/-2/-3) or ±3% (MIC2164C) feedback accuracy
- Up to 95% efficiency
- Foldback current limit and "hiccup" mode short-circuit protection
- 6ms Internal soft start
- Thermal shutdown
- Safe start-up into pre-biased loads
- -40°C to +125°C junction temperature range
- Available in 10-pin MSOP package
参数
类型 | 描述 |
Current Limit / Short Circuit Protection | 1 |
Enable Pin | 1 |
Input UVLO Typ (V) | 2.7 |
Internal Compensation | 1 |
Internal Voltage Bias | 1 |
Iq Off (µA) | 800 |
MaximumInputVoltage | 28 |
MaximumOutputVoltage | 5.5 |
MinimumInputVoltage | 3 |
MinimumOutputVoltage | 0.8 |
Operating Supply Current (mA) | 1.4 |
Package | 10/MSOP |
Soft Start | 1 |
Supported Outputs | 1 |
Supported Topologies | Sync. Buck |
Typical Tolerance (%) | ±1 |



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