说明
MIC2125和MIC2126是具有独特自适应开启时间控制架构的恒定频率同步降压控制器。MIC2125/6在4.5V至28V的输入电压范围内工作,可用于提供高达25A的负载电流。输出电压可调至0.6V,保证精度为±1%。该装置的可编程开关频率为200kHz至650kHz。
超轻负载®体系结构提供了与超高速控制相同的高效和超快瞬态响应®中到重载下的体系结构。它还通过转换到可变频率、不连续导通模式操作,在轻负载条件下保持高效率。
MIC2125/6提供全套保护功能,确保在故障条件下对IC进行保护。其中包括确保在功率暂降条件下正常运行的欠压锁定、减少涌入电流的内部软启动、“打嗝”模式短路保护和热停堆。
特性
- Hyper Speed Control® architecture enables:
- High delta-V operation (VIN = 28V and VOUT = 0.6V)
- Any Capacitor™ stable
- 4.5V to 28V input voltage
- Adjustable output voltage from 0.6V to 24V
- 200kHz to 650kHz programmable switching frequency
- HyperLight Load® (MIC2125)
- Hyper Speed Control® (MIC2126)
- Enable input and power good output
- Built-in 5V regulator for single-supply operation
- Programmable current limit and "hiccup" mode short-circuit protection
- 7ms internal soft-start, internal compensation, and thermal shutdown
- Supports safe start-up into a pre-biased output
- -40°C to +125°C junction temperature range
- Available in 16-pin 3mm x 3mm QFN package
参数
类型 | 描述 |
Current Limit / Short Circuit Protection | 1 |
Max Duty Cycle (%) | 85 |
Enable Pin | 1 |
External Clock Sync | 0 |
Input UVLO Typ (V) | 4.2 |
Internal Compensation | 1 |
Internal Voltage Bias | 1 |
Iq Off (µA) | 0.1 |
MaximumInputVoltage | 28 |
MaximumOutputVoltage | 28 |
MinimumInputVoltage | 4.5 |
MinimumOutputVoltage | 0.6 |
Operating Supply Current (mA) | 1.1 |
PFM, Discontinuous, Hyperlight load, or Skip Mode | 0 |
Package | 3mm X 3mm |
Power Good Signal | 1 |
Soft Start | 1 |
Supported Outputs | 1 |
Supported Topologies | COT |
Typical Tolerance (%) | 1 |



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