ADI公司的ADP5014是在6 mm × 6 mm 40引腳LFCSP封裝中集成四路高性能低噪聲降壓調(diào)節(jié)器,其所有通道均集成高端和低端功率金屬氧化物半導體場效應晶體管(MOSFET).通道1和通道2同時提供2 A或4 A的可編程輸出電流,通道3和通道4同時提供1 A和2 A的可編程輸出電流.其它特性包括可選強制脈沖寬度調(diào)制(FPWM)/省電模式(PSM),欠壓輸出(UVO),有源輸出放電和電源良好指示.安全特性包括輸入欠壓閉鎖(UVLO),過壓保護(OVP),過流保護(OCP)和熱關斷(TSD).輸入電壓2.75V-6.0V,可編輸出電壓0.5V-0.9xVINx.主要用在RF收發(fā)器,高速模數(shù)轉(zhuǎn)換器(ADC)/數(shù)模轉(zhuǎn)換器(DAC),混合信號ASIC,現(xiàn)場可編程門陣列(FPGA)和處理器應用,安防和監(jiān)控以及醫(yī)療應用.本文介紹了ADP5014主要特性,功能框圖,典型應用電路,以及評估板ADP5014-EVALZ主要特性,電路圖,材料清單和PCB設計圖.

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應用:

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

圖1. ADP5014功能框圖

圖2. ADP5014典型應用電路圖(1)

圖3. ADP5014典型應用電路圖(2):FPGA應用,1.2MHz開關頻率,順序使能模式

圖4. ADP5014典型應用電路圖(2):RF收發(fā)器應用,1.2MHz開關頻率,順序使能模式

評估板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.

評估板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

圖5.評估板ADP5014-EVALZ外形圖

圖6.評估板ADP5014-EVALZ電路圖
評估板ADP5014-EVALZ材料清單(BOM):

圖7.評估板ADP5014-EVALZ PCB設計圖(1)

圖8.評估板ADP5014-EVALZ PCB設計圖(2)

圖9.評估板ADP5014-EVALZ PCB設計圖(3)

圖10.評估板ADP5014-EVALZ PCB設計圖(4)
詳情請見:

和
ADP5014-EVALZ-UG-1137.pdf