原标题：Linear LTM8056 58VIN 48VOUT升-降微模块稳压方案

　　Linear公司的LTM8056是58VIN升-降微模块(μModule)稳压器,完整的降压-升压开关电源,输入电压从5V到58V,输出电压在1.2V-48V,效率高达96%,输入和输出电流监视,开关频率100kHz 到800kHz,主要用在大功率电池为能源设备,工业控制,太阳能电压稳压器和充电器.本文介绍了LTM8056主要特性,框图,几种应用电路,以及演示板2154A主要指标,电路图表,材料清单和PCB元件布局图.

　　The LTM.8056 is a 58VIN, buck-boost μModule (micromodule) regulator. Included in the package are the switching controller, power switches, inductor and support components. A resistor to set the switching frequency, a resistor divider to set the output voltage, and input and output capacitors are all that are needed to complete the design. Other features such as input and output average current regulation may be implemented with just a few components. The LTM8056 operates over an input voltage range of 5V to 58V, and can regulate output voltages between 1.2V and 48V. The SYNC input and CLKOUT output allow easy synchronization.

　　The LTM8056 is housed in a compact overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8056 is available with SnPB or RoHS compliant terminal finish.

　　LTM8056主要特性:

　　Complete Buck-Boost Switch Mode Power Supply

　　Wide Input Voltage Range: 5V to 58V

　　12V/1.7A Output from 6VIN

　　12V/3.4A Output from 12VIN

　　12V/5.4A Output from 24VIN

　　Up to 96% Efficient

　　Adjustable Input and Output Average Current Limits

　　Input and Output Current Monitors

　　Parallelable for Increased Output Current

　　Wide Output Voltage Range: 1.2V to 48V

　　Selectable Switching Frequency: 100kHz to 800kHz

　　Synchronization from 200kHz to 700kHz

　　15mm × 15mm× 4.92mm BGA Package

　　LTM8056应用:

　　High Power Battery-Operated Devices

　　Industrial Control

　　Solar Powered Voltage Regulator

　　Solar Powered Battery Charging

　　图1. LTM8056框图

　　图2. LTM8056 18VOUT模拟电流控制风扇电源电路:输入3VIN到58VIN,2A输入电流限制

　　图3. LTM8056 24VOUT,输入9VIN-58VIN,限流1.1A

　　图4. LTM8056 18VOUT,输入18VIN-58VIN,限流2.5A,输出电流监视

　　图5. 两个LTM8056并联可得到更大输出电流,同步和开关180度反相

　　图6. 两个LTM8056并联,不同输入源单个负载.每个LTM8056电流不大于1.1A,相互同步,180度反相

　　演示板2154A

　　Demonstration circuit 2154A features the LTM®8056, a buck-boost μModule® regulator that accepts input voltages lower, higher or the same as the output, but is also highly efficient due to its four-switch architecture. The output for DC2154A is 24V and the input voltage range is 7V to 58V. The maximum output current is 3A and the switching frequency is 525kHz.

　　DC2154A supports the adjustable and controllable features of the LTM8056 including output voltage and current regulation, switching frequency, RUN threshold, soft-start period, synchronization and reverse inductor current inhibit.

　　In most cases, adjustment is made by modifying the appropriate resistor or capacitor component(s). DC2154A provides output current monitoring and a clock output.

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

　　演示板2154A 主要性能:

　　Input current monitoring and regulation requires the installation of a current sense resistor.

　　The SVIN input for controller power can be made a diode-OR of power VIN and the output voltage to extend the operating range of power VIN to lower voltages. There are places to mount optional components that add an LC input filter and also a unity gain buffer to operate multiple DC2154As in parallel.

　　The LTM8056 data sheet must be read in conjunction with this demo manual to properly use or modify DC2154A.

　　图7. 演示板2154A外形图

　　演示板2154A主要指标:

　　演示板2154A材料清单: