MIC2826中文资料Single 500mA Step-Down and Triple 150mA LDOs with I2C Voltage Control & Sequencing数据手册Microchip规格书

描述 Description

The MIC2826 is a four output, programmable Power Management IC, optimized for high efficiency power support in Mobile Application Processors, Co-Processors, DSPs, GPS and Media Player chipsets. The device integrates a single 500mA PWM/PFM synchronous buck (step-down) regulator with three Low Dropout Regulators and a 400kHz I²C interface that provides programmable Dynamic Voltage Scaling (DVS), Power Sequencing, and individual output Enable/Disable controls allowing the user to optimally control all four outputs. The 4MHz synchronous buck regulator features a patented HyperLight Load® (HLL) architecture which minimizes switching losses and provides low quiescent current operation for high efficiency at light loads. Additional benefits of this proprietary architecture are low output ripple voltage and fast transient response throughout the entire load range with the use of small output capacitors, reducing the overall system size.Three high performance LDOs are integrated into the MIC2826 to provide additional system voltages for I/O, memory and other analog functions. Each LDO is capable of sourcing 150mA output current with high PSRR and low output noise. A 2% output voltage accuracy, low dropout voltage (150mV @ 150mA), and low ground current of 116µA (all three LDOs operating) makes this device ideally suited for mobile applications.

特性 Features

• Fast-mode I2C control interface
• Default start-up voltage states and sequencing
• Fault indication processor flag - IRQb
• -40°C to 125°C junction temperature range
• Thermal shutdown and current-limit protection
• Power On After Fault (POAF) function
DC-DC Synchronous Buck
• 2.7V to 5.5V input voltage range
• 500mA continuous output current
• HyperLight Load® mode
• 25µA quiescent current
• 90% peak efficiency; 85% at 1mA
• Ultra-fast transient response
• Dynamic Voltage Scaling (DVS) range: 0.8V to 1.8V
• 0.8V to 1.2V in 25mV steps
• 1.2V to 1.8V in 50mV steps
• ±2% initial accuracy
• Low output voltage ripple: 20mVpp in HyperLight Load®mode, 3mV in full PWM mode
LDOs
• 1.8V to VDVIN input voltage range
• 150mA output current (each LDO)
• Dynamic Voltage Scaling (each LDO)
• DVS range: 0.8V to 3.3V in 50mV steps
• ±2% initial accuracy
• Low quiescent current: 50µA (each LDO)
• Low dropout voltage: 50mV @ 50mA
• Low output noise: 45µVrms
• Stable with ceramic output capacitors
• 65dB PSRR at 1kHz

简介

MIC2826属于集成电路（IC）的电源管理-专用。由制造生产的MIC2826电源管理 - 专用专用型电源管理集成电路 (PMIC) 用于电源的控制或操作，适合特定或小范围的目标应用，例如汽车气囊管理、电容器组平衡、AC 公共电力监控、存储器总线端接、接地故障检测、能量收集、小型引擎管理、处理器或芯片集专用电压调节、负载突降保护、触觉驱动器、热电制冷器控制等。