Linear公司的LTM8054是36VIN降压-升压微模块(μModule)调整器,包括有开关控制器,功率开关,电感器和支持元件.输入电压5V-36V,输出电压1.2V到36V可调,输出电流从1.8A到5.4A,效率高达94%,主要用在大功率以电池为能源的设备,工业控制,太阳能电压稳压器和电池充电器.本文介绍了LTM8054主要特性,框图和多种应用电路,以及LTM8054演示板DC2016A主要特性,电路图,材料清单和PCB元件布局图.

The LTM?8054 is a 36VIN, buck-boost μModule?(micromodule) regulator. Included in the package are theswitching controller, power switches, inductor and supportcomponents. A resistor to set the switching frequency, aresistor divider to set the output voltage, and input andoutput capacitors are all that are needed to complete thedesign. Other features such as input and output averagecurrent regulation may be implemented with just a fewcomponents. The LTM8054 operates over an input voltagerange of 5V to 36V, and can regulate output voltagesbetween 1.2V and 36V. The SYNC input and CLKOUToutput allow easy synchronization.

The LTM8054 is housed in a compact overmolded ballgrid array (BGA) package suitable for automated assemblyby standard surface mount equipment. The LTM8054 isRoHS compliant.

LTM8054主要特性:

nnComplete Buck-Boost Switch Mode Power Supply
nnWide Input Voltage Range: 5V to 36V
nnWide Output Voltage Range: 1.2V to 36V
nnVIN May Be Greater than, Equal to or Less than VOUT
nn12V/1.8A Output from 6VIN
nn12V/3.4A Output from 12VIN
nn12V/5.4A Output from 24VIN
nnUp to 94% Efficient
nnAdjustable Input and Output Average Current Limits
nnInput and Output Current Monitors
nnParallelable for Increased Output Current
nnSelectable Switching Frequency: 100kHz to 800kHz
nnSynchronization from 200kHz to 700kHz
nn11.25mm ??15mm ??3.42mm BGA Package

LTM8054应用:

nnHigh Power Battery-Operated Devices
nnIndustrial Control
nnSolar Powered Voltage Regulator
nnSolar Powered Battery Charging

图1.LTM8054框图

图2. LTM8054应用电路图(1)

图3. LTM8054应用电路图(2)

图3. LTM8054应用电路图(3)

LTM8054演示板DC2016A

Demonstration circuit 2016A features the LTM8054, asynchronous buck-boost μModule regulator that acceptsinput voltages lower, higher or the same as the output,but is also highly efficient due to its four-switch architecture.

The output for DC2016A is 12V and the inputvoltage range is 6V to 35V – see the LTM8054 data sheetfor application circuits with input voltages up to 36V.

The maximum output current of DC2016A is 3A and theswitching frequency is 600kHz.
DC2016A supports the adjustable and controllable featuresof the LTM8054 including output voltage and currentregulation, switching frequency, RUN threshold, softstartperiod, synchronization and reverse inductor currentinhibit. In most cases, adjustment is made by modifyingthe appropriate resistor or capacitor component(s).

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of LinearTechnology Corporation. All other trademarks are the property of their respective owners.

DC2016A provides output current monitoring and a clockoutput. Input current monitoring and regulation requiresthe installation of a current sense resistor. The SVIN inputfor controller power can be made a diode-OR of powerVIN and the output voltage to extend the operating rangeof power VIN to lower voltages. There are places to mountoptional components that add an LC input filter and also aunity gain buffer to operate multiple DC2016As in parallel.

图4.LTM8054演示板DC2016A外形图

图5. LTM8054演示板DC2016A电路图
LTM8054演示板DC2016A材料清单:


图6. LTM8054演示板DC2016A PCB元件布局图(顶层)

图7. LTM8054演示板DC2016A PCB元件布局图(底层)
详情请见:
http://cds.linear.com/docs/en/datasheet/8054f.pdf
和http://cds.linear.com/docs/en/demo-board-manual/DC2016AF.PDF
8054f.pdf
DC2016AF.PDF