说明
MIC2877是一款紧凑高效的2MHz同步升压调节器,配有6.5A(典型)开关。它具有双向真负载断开功能,当设备被禁用(EN=GND)时,可以防止输入和输出之间的任何泄漏电流,保护输入电源并提高启动性能。
MIC2877的输入电压范围在2.5V和5.5V之间,并提供2A输出连续电流在=3V和VOUT=5V。提供固定输出和可调节输出版本。
当输入电压高于或等于目标输出电压时,MIC2877自动运行在旁路模式下。在轻负载下,升压转换器进入脉冲频率调制(PFM)模式以提高效率。在停机模式下,调节器通常消耗不到2µA。
MIC2877还具有集成的防振铃开关,可最大限度地减少EMI、过电压和过电流保护、UVLO和热关机。MIC2877采用8引脚FTQFN 2mm x 2mm封装。
特性
- Typical 6.5A Input Peak Current Limit
- Up to 95% Efficiency
- Fully Integrated, High Efficiency, 2MHz Switching Frequency
- Bidirectional True Load Disconnect, Overvoltage Protection (OVP) and Undervoltage Lockout (UVLO)
- Controlled Pre-Charge Current Limit at Start-Up
- Ultra-Fast Transient Response
- Input Voltage Range from 2.5V to 5.5V
- 1.5A, VIN = 2.5V and VOUT = 5V
- 2A, VIN = 3V and VOUT = 5V
- Adjustable
- Fixed Versions: 4.75V, 5V, 5.25V, 5.5V
- Integrated Anti-Ringing Switch for EMI Reduction
- Typically Less than 2µA Shutdown Current
- Internal Compensation
- Bypass Mode for VIN ≥ VOUT
- Power Good (PG) Output
- Overcurrent Protection and Thermal Shutdown
- Available Package: 8-pin FTQFN 2mm x 2mm
参数
类型 | 描述 |
Max Duty Cycle (%) | 93.6 |
Input Voltage Range Max | 5.5 |
Input Voltage Range Min | 2.5 |
# of Outputs | 0 |
Output Current | 0 |
Driver Type | Step Up (Boost) |
QuiescentCurrent | 0.125 |
Synchronous Rectifier | Yes |
Temp Range Max | 85 |
Temp Range Min | -40 |
VoutMax | 5.5 |
Vfb (V) | 0.9 |



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