ADI ADP5014 LFCSP封装中集成高性能低噪声降压调节器解决方案
ADI公司的ADP5014是在6 mm × 6 mm 40引脚LFCSP封装中集成四路高性能低噪声降压调节器,其所有通道均集成高端和低端功率金属氧化物半导体场效应晶体管(MOSFET).通道1和通道2同时提供2 A或4 A的可编程输出电流,通道3和通道4同时提供1 A和2 A的可编程输出电流.其它特性包括可选强制脉冲宽度调制(FPWM)/省电模式(PSM),欠压输出(UVO),有源输出放电和电源良好指示.安全特性包括输入欠压闭锁(UVLO),过压保护(OVP),过流保护(OCP)和热关断(TSD).输入电压2.75V-6.0V,可编输出电压0.5V-0.9xVINx.主要用在RF收发器,高速模数转换器(ADC)/数模转换器(DAC),混合信号ASIC,现场可编程门阵列(FPGA)和处理器应用,安防和监控以及医疗应用.本文介绍了ADP5014主要特性,功能框图,典型应用电路,以及评估板ADP5014-EVALZ主要特性,电路图,材料清单和PCB设计图.
The ADP5014 combines four high performance, low noise buckregulators in a 40-lead LFCSP package. Relying on its lowoutput noise (~25 μVrms when VOUT ≤ VREF), the low noisebuck regulator enables the powering up of the noise sensitivesignal chain products.
All channels in the ADP5014 integrate high-side and low-sidepower metal-oxide semiconductor field effect transistors(MOSFET). Channel 1 and Channel 2 deliver a programmableoutput current of 2 A or 4 A. Combining Channel 1 andChannel 2 in a parallel configuration provides a single outputwith up to 8 A of current.
Channel 3 and Channel 4 deliver a programmable output currentof 1 A or 2 A. Combining Channel 3 and Channel 4 in a parallelconfiguration can provide a single output with up to 4 A of current.
The ADP5014 features two enable modes. The manual modehas four individual precision enable pins to enable eachregulator manually. Alternatively, the sequence mode has one grouped precision enable signal with programmable power-upand power-down delay timers on each rail for specific railsequence requirements.
The switching frequency of the ADP5014 can be programmedor synchronized to an external clock from 500 kHz to 2.5 MHz.The ADP5014 offers other key features like selective forcedpulse width modulation (FPWM)/power saving mode (PSM),an undervoltage output (UVO), active output discharge, and apower-good flag. Other safety features include input undervoltagelockout (UVLO), overvoltage protection (OVP),overcurrent protection (OCP) and thermal shutdown (TSD).
ADP5014主要特性:
Input voltage range: 2.75 V to 6.0 V
Programmable output voltage range: 0.5 V to 0.9 × PVINx
Low output noise: ~25 μVrms when VOUT ≤ VREF±1.0% output accuracy over full temperature range500 kHz to 2.5 MHz adjustable switching frequency
Power regulation
Channel 1 and Channel 2: programmable 2 A/4 A syncbuck regulators, or single 8 A output in parallel
Channel 3 and Channel 4: programmable 1 A/2 A syncbuck regulators, or single 4 A output in parallel
Flexible parallel operation
Precision enable with 0.6 V threshold
Manual or sequence mode for power-up and power-downsequence
Selective FPWM or PSM operation mode
Precision undervoltage comparator
Frequency synchronization input or output
Active output discharge switch
Power-good flag on selective channels via factory fuse
UVLO, OVP, OCP, and TSD protection
40-lead, 6 mm × 6 mm LFCSP package
−40 ℃ to +125 ℃ junction temperature
ADP5014应用:
RF transceiver, high speed analog-to-digital converter
(ADC)/digital-to-analog converter (DAC), mixed signal ASIC
FPGA and processor applications
Security and surveillance
Medical applications
图1. ADP5014功能框图
图2. ADP5014典型应用电路图(1)
图3. ADP5014典型应用电路图(2):FPGA应用,1.2MHz开关频率,顺序使能模式
图4. ADP5014典型应用电路图(2):RF收发器应用,1.2MHz开关频率,顺序使能模式
评估板ADP5014-EVALZ
This user guide describes the evaluation of the ADP5014 and includes detailed schematics and printed circuit board (PCB) layouts.
The ADP5014-EVALZ evaluation board combines four high performance buck regulators in a 40-lead LFCSP package to meet the demanding performance and board space requirements.
Full details on the ADP5014 regulator are provided in the ADP5014 data sheet, available from Analog Devices, Inc. Consult the data sheet in conjunction with this user guide when working with this evaluation board.
评估板ADP5014-EVALZ主要特性:
Full featured evaluation board for the ADP5014
Compact solution size
4-layer high glass transition temperature (TG) PCB for superior thermal performance
Convenient connections through vertical printed circuit tail pin headers
Supply voltage
2.75 V to 6.0 V for PVINx
Mode option to select manual or sequence enable
Mode option to select PSM or FPWM operation
Programmable switching frequency from 500 kHz to 2.5 MHz
Frequency synchronization input or output
图5.评估板ADP5014-EVALZ外形图
图6.评估板ADP5014-EVALZ电路图
评估板ADP5014-EVALZ材料清单(BOM):
图7.评估板ADP5014-EVALZ PCB设计图(1)
图8.评估板ADP5014-EVALZ PCB设计图(2)
图9.评估板ADP5014-EVALZ PCB设计图(3)
图10.评估板ADP5014-EVALZ PCB设计图(4)
Analog Devices, Inc.(简称ADI)。中国注册公司名字为“亚德诺半导体技术(上海)有限公司。美国纳斯达克上市公司 (NASDAQ代码: ADI)。
将创新、业绩和卓越作为企业的文化支柱,并基此成长为该技术领域最持久高速增长的企业之一。ADI公司是业界认可的数据转换和信号处理技术全球领先的供应商,拥有遍布世界各地的60,000客户,涵盖了全部类型的电子设备制造商。作为领先业界40多年的高性能模拟集成电路(IC)制造商,ADI的产品用于模拟信号和数字信号处理领域。
公司总部设在美国马萨诸塞州诺伍德市,设计和制造基地遍布全球。ADI公司被纳入标准普尔500指数(S&P 500 Index)。
客户面临最终挑战是向市场推出具有竞争优势的产品。因此,面对的挑战是提高性能、精度、速度和集成度,降低器件尺寸、能耗和价格,与客户更有效紧密地开展合作—这一切均能进一步提高创新能力。由于ADI专注于创造更具创新、更可靠的产品,ADI不仅将持续处于技术领先地位,还将证明,ADI的产品的与众不同是为客户创造巨大价值的关键所在。AD阵容不断扩大的创新产品有:放大器和线性产品、数据转换器、音频和视频产品、宽带产品、时钟和定时IC、光纤和光通信产品、接口和隔离、MEMS和传感器、电源和散热管理、处理器和DSP、RF和IF ICs、开关和多路复用器等等。
在可穿戴电子领域,ADI拥有一系列创新产品和解决方案,例如支持多种便携式医疗保健领域的高精度、低功耗片上计量仪ADuCM350已在国内和国外的几家有代表性的大客户中都取得里程碑式的进展;
突破性的超低功耗3轴数字MEMS产品ADXL362在运动检测唤醒模式下功耗仅为300 nA,其超低功耗的特征是可穿戴运动监测设备的理想解决方案;低功耗、单导联、心率监护仪模拟前端(AFE) AD8232,专为满足新兴的健身设备、便携式/佩戴式监控设备和远程健康监护设备的ECG信号调理要求而设计;
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