ZHCS803E June 2013 – February 2020 LMZ31704
PRODUCTION DATA.
- 1 特性
- 2 应用
- 3 说明
- 4 修订历史记录
- 5 Specifications
- 6 Device Information
- 7 Typical Characteristics (PVIN = VIN = 12 V)
- 8 Typical Characteristics (PVIN = VIN = 5 V)
- 9 Typical Characteristics (PVIN = 3.3 V, VIN = 5 V)
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10Application Information
- 10.1 Adjusting the Output Voltage
- 10.2 Capacitor Recommendations for the LMZ31704 Power Supply
- 10.3 Transient Response
- 10.4 Transient Waveforms
- 10.5 Application Schematics
- 10.6 Custom Design With WEBENCH® Tools
- 10.7 VIN and PVIN Input Voltage
- 10.8 3.3 V PVIN Operation
- 10.9 Power Good (PWRGD)
- 10.10 SYNC_OUT
- 10.11 Parallel Operation
- 10.12 Light Load Efficiency (LLE)
- 10.13 Power-Up Characteristics
- 10.14 Pre-Biased Start-up
- 10.15 Remote Sense
- 10.16 Thermal Shutdown
- 10.17 Output On/Off Inhibit (INH)
- 10.18 Slow Start (SS/TR)
- 10.19 Overcurrent Protection
- 10.20 Synchronization (CLK)
- 10.21 Sequencing (SS/TR)
- 10.22 Programmable Undervoltage Lockout (UVLO)
- 10.23 Layout Considerations
- 10.24 EMI
- 11器件和文档支持
- 12机械、封装和可订购信息
10.24 EMI
The LMZ31704 is compliant with EN55022 Class B radiated emissions. Figure 46 and Figure 47 show typical examples of radiated emissions plots for the LMZ31704 operating from 5 V and 12 V, respectively. Both graphs include the plots of the antenna in the horizontal and vertical positions.
Figure 46. Radiated Emissions 5-V Input, 1.8-V Output, 4-A Load (EN55022 Class B) 
Figure 47. Radiated Emissions 12-V Input, 1.8-V Output, 4-A Load (EN55022 Class B)