说明
MIC21LV32是一款先进的恒定导通时间双相同步降压控制器,具有独特的自适应导通时间控制架构,最多可堆叠8相。MIC21LV32在4.5V至36V的输入电源范围内工作,可用于需要高达50A输出电流的应用。输出电压可调至0.6V,在整个操作过程中保证精度为±1%,在-40至105摄氏度的温度范围内保证精度为?.5%。该装置的可编程开关频率为每相100 kHz至1MHz。Hyper-Speed Control®体系结构支持在中到重负载下的超快瞬态响应。软启动也可通过电容器进行外部编程,从而实现在重负载下的安全启动。MIC21LV32具有用于精确输出电压控制的远程感测放大器。MIC21LV32提供全套保护功能,确保在各种故障条件下对IC进行保护。其中包括欠压锁定(UVLO),以确保在功率暂降条件下正常运行,打嗝模式短路保护和热关机。MIC21LV32有32引脚5mm x 5mm VQFN封装,结工作温度范围为-40°C至+125°C
特性
- Input Voltage Range: 4.5V to 36V
- Adjustable Output Voltage from 0.6V to 28V
- 0.6V Internal Reference with ±1% Accuracy
- ±0.5% Reference Accuracy for -40°C to 105°C
- Operates in CCM, Stackable for Multiphase Operation up to 8 Phases
- Accurate 180° Phasing of Outputs
- Remote Sense Amplifier for Tight Output Regulation
- Droop Feature to Support Adaptive Voltage Positioning (AVP) for Improved Load Transient Response
- Programmable Current Limit and Hiccup Mode Short-Circuit Protection
- –40°C to +125°C Junction Temperature Range
- External Programmable Soft Start to Reduce Inrush Current
- Programmable Current Limit and Hiccup Mode Short-Circuit Protection
- Thermal Shutdown with Hysteresis
- Compact Size 5 mm x 5 mm 32-Pin VQFN Package
参数
类型 | 描述 |
Configuration | Dual Phase |
Current Limit / Short Circuit Protection | 1 |
Max Duty Cycle (%) | 80 |
Enable Pin | 1 |
External Clock Sync | 0 |
Input UVLO Typ (V) | 4.3 |
Internal Compensation | 0 |
Internal Voltage Bias | 1 |
Iq Off (µA) | 25 |
MaximumInputVoltage | 36 |
MaximumOutputVoltage | 36 |
MinimumInputVoltage | 4.5 |
MinimumOutputVoltage | 0.6 |
Operating Supply Current (mA) | 5 |
PFM, Discontinuous, Hyperlight load, or Skip Mode | 1 |
Package | 32/VQFN |
Power Good Signal | 1 |
Driver Type | Analog Controller |
Soft Start | 1 |
Supported Outputs | 1 |
Supported Topologies | Buck |
Typical Tolerance (%) | 0.5 |
Operating Temp Range (°C) | -40°C to 105°C |
Max Continuous Current per Output | 0 |
Max Driver Output Voltage (V) | 5.4 |
Minimum Driver Output Voltage (V) | 4.5 |



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