ADI ADP5034微电源管理(PMU)解决方案

ADI公司的ADP5034集成了两个高性能降压稳压器(1200mA)和两个低压降(LDO)的稳压器(300mA),输入电压2.3V-5.5V,稳压器精度±3%,可编程输出电压,工作频率3MHz,采用24引脚4 mm × 4 mm LFCSP封装,主要用在处理器,ASIC,FPGA和RF芯片组电源,手提仪器和医疗设备以及空间受限设备.本文介绍了ADP5034主要特性,方框图,典型应用电路和所采用元件,以及微电源管理单元(PMU)评估板主要特性,电路图,材料清单和元器件布局图.
The ADP5034 combines two high performance buck regulators and two low dropout (LDO) regulators in a small, 24-lead 4 mm × 4 mm LFCSP to meet demanding performance and board space requirements.
The high switching frequency of the buck regulators enables tiny multilayer external components and minimizes the board space. When the MODE pin is set to high, the buck regulators operate in forced PWM mode. When the MODE pin is set to low, the buck regulators operate in PWM mode when the load is above a pre-defined threshold. When the load current falls below a predefined threshold, the regulator operates in power save mode (PSM), improving the light load efficiency.
The two bucks operate out of phase to reduce the input capacitor requirement. The low quiescent current, low dropout voltage, and wide input voltage range of the ADP5034 LDOs extend the battery life of portable devices. The ADP5034 LDOs maintain power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.
Regulators in the ADP5034 are activated through dedicated enable pins. The default output voltages can be externally set in the adjustable version, or factory programmable to a wide range of preset values in the fixed voltage version.
ADP5034主要特性:
Main input voltage range: 2.3 V to 5.5 V
Two 1200 mA buck regulators and two 300 mA LDOs
24-lead, 4 mm × 4 mm LFCSP package
Regulator accuracy: ±3%
Factory programmable or external adjustable VOUTx
3 MHz buck operation with forced PWM and auto PWM/PSM modes
BUCK1/BUCK2: output voltage rang...