[原创] TI LMR33630SIMPLE SWITCHER高效稳压器解决方案

TI公司的LMR33630是SIMPLE SWITCHER®稳压器,提供最好效率容易使用的降压DC/DC转换器,输入电压高达36V,负载电流高达3A,能在解决方案非常小尺寸提供轻负载高效率(峰效率大于95%)和输出高精度,输入电压3.8V-36V,输出电压1V-24V,集成了75 mΩ/50 mΩRDS-ON功率MOSFET,峰值电流模式控制,开关频率400 kHz,1.4 MHz和2.1 MHz,主要用在马达驱动系统如无人机,AC逆变器,VF驱动和伺服系统,工厂和建筑物自动化系统如PLC CPU,HVAC控制,电梯控制以及通用宽VIN电源.本文介绍了LMR33630主要特性,功能框图和应用电路,以及评估模块LMR33630 EVM主要特性,电路图,材料清单和PCB设计图.

The LMR33630 SIMPLE SWITCHER® regulator is aneasy-to-use, synchronous, step-down DC/DCconverter that delivers best-in-class efficiency forrugged industrial applications. The LMR33630 iscapable of driving up to 3 A of load current from aninput of up to 36 V. The LMR33630 provides highlight load efficiency and output accuracy in a verysmall solution size. Features such as a power-goodflag and precision enable provide both flexible andeasy-to-use solutions for a wide range of applications.

The LMR33630 automatically folds back frequency atlight load to improve efficiency. Integration eliminatesmost external components and provides a pinoutdesigned for simple PCB layout. Protection featuresinclude thermal shutdown, input undervoltage lockout,cycle-by-cycle current limit, and hiccup short-circuitprotection. The LMR33630 is available in an 8-pinHSOIC package and in a 12-pin 3 mm × 2 mm VQFNpackage with wettable flanks. This device is alsoavailable in an AEC-Q100-qualified version.Thisdevice is also availabe in an AEC-Q100 qualifiedversion.

LMR33630主要特性:

1• Configured for Rugged Industrial Applications
– Input Voltage Range: 3.8 V to 36 V
– Output Voltage Range: 1 V to 24 V
– Output Current: 3 A
– 75 mΩ/50 mΩ RDS-ON Power MOSFETs
– Peak-Current-Mode Control
– Short Minimum On-Time of 68 ns
– Frequency: 400 kHz, 1.4 MHz, 2.1 MHz
– Junction Temperature Range –40℃ to+125℃
– Low EMI and Low Switching Noise
– Integrated Compensation Network
• High Efficiency Solution
– Peak Efficiency > 95%
– Low Shutdown Quiescent Current of 5 μA
– Low Operating Quiescent Current of 25 μA
• Flexible System Interface
– Power-Good Flag and Precision Enable
• Create a Custom Design Using the LMR33630with the WEBENCH® Power Designer

LMR33630应用:

• Motor Drive Systems: Drones, AC Inverters,VF Drives, Servos
• Factory and Building Automation Systems:PLC CPU, HVAC Control, Elevator Control
• General Purpose Wide VIN Power Supplies

图1.LMR33630功能框图

图2.LMR33630应用电路(400kHz)

评估模块LMR33630 EVM

The Texas Instruments LMR33630 EVM evaluation module (EVM) helps designers evaluate the operationand performance of the LMR33630 buck regulator. The LMR336x0 is a family of easy-to-use synchronousstep-down DC/DC converters capable of driving up to 3 A of load current from an input voltage of 3.8 V to36 V. The LMR33630 EVM features a selectable output voltage of 3.3 V or 5 V and a switching frequencyof either 400 kHz or 2.1 MHz. See the LMR33630 data sheet for additional features, detailed description,and available options.

图3.评估模块LMR33630 EVM外形图(顶视图)

图4.评估模块LMR33630 EVM边沿连接图

图5.评估模块LMR33630 EVM电路图
评估模块LMR33630ADDAEVM材料清单:

评估模块LMR33630CDDAEVM材料清单:

图6.评估模块LMR33630ADDAEVM PCB设计图(顶层铜)

图7.评估模块LMR33630ADDAEVM PCB设计图(中层1)

图8.评估模块LMR33630ADDAEVM PCB设计图(中层2)

图9.评估模块LMR33630ADDAEVM PCB设计图(底层铜)
详情请见:

和
lmr33630.pdf