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

簡介

MIC2826屬于集成電路（IC）的電源管理-專用。由制造生產(chǎn)的MIC2826電源管理 - 專用專用型電源管理集成電路 (PMIC) 用于電源的控制或操作，適合特定或小范圍的目標(biāo)應(yīng)用，例如汽車氣囊管理、電容器組平衡、AC 公共電力監(jiān)控、存儲器總線端接、接地故障檢測、能量收集、小型引擎管理、處理器或芯片集專用電壓調(diào)節(jié)、負(fù)載突降保護(hù)、觸覺驅(qū)動器、熱電制冷器控制等。