ZHCSBC7E JULY   2013  – December 2019 LMZ31710

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      简化应用
  4. 4 修订历史记录
  5. 5 Pin Configuration and Functions
    1.     Pin Functions
  6. 6 Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 ESD Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Typical Characteristics (PVIN = VIN = 12 V)
    7. 6.7 Typical Characteristics (PVIN = VIN = 5 V)
    8. 6.8 Typical Characteristics (PVIN = 3.3 V, VIN = 5 V)
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  VIN and PVIN Input Voltage
      2. 7.3.2  3.3-V PVIN Operation
      3. 7.3.3  Adjusting the Output Voltage (0.6 V to 5.5 V)
      4. 7.3.4  Capacitor Recommendations For the LMZ31710 Power Supply
        1. 7.3.4.1 Capacitor Technologies
          1. 7.3.4.1.1 Electrolytic, Polymer-Electrolytic Capacitors
          2. 7.3.4.1.2 Ceramic Capacitors
          3. 7.3.4.1.3 Tantalum, Polymer-Tantalum Capacitors
        2. 7.3.4.2 Input Capacitor
        3. 7.3.4.3 Output Capacitor
      5. 7.3.5  Transient Response
        1. 7.3.5.1 Transient Response Waveforms
      6. 7.3.6  Power Good (PWRGD)
      7. 7.3.7  Light Load Efficiency (LLE)
      8. 7.3.8  SYNC_OUT
      9. 7.3.9  Parallel Operation
      10. 7.3.10 Power-Up Characteristics
      11. 7.3.11 Pre-Biased Start-Up
      12. 7.3.12 Remote Sense
      13. 7.3.13 Thermal Shutdown
      14. 7.3.14 Output On/Off Inhibit (INH)
      15. 7.3.15 Slow Start (SS/TR)
      16. 7.3.16 Overcurrent Protection
      17. 7.3.17 Synchronization (CLK)
      18. 7.3.18 Sequencing (SS/TR)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Programmable Undervoltage Lockout (UVLO)
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 Custom Design With WEBENCH® Tools
        2. 8.2.2.2 Setting The Output Voltage
        3. 8.2.2.3 Setting the Switching Frequency
        4. 8.2.2.4 Input Capacitance
        5. 8.2.2.5 Output Capacitance
    3. 8.3 Additional Application Schematics
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Considerations
    2. 10.2 Layout Examples
      1. 10.2.1 EMI
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 开发支持
        1. 11.1.1.1 使用 WEBENCH® 工具创建定制设计
      2. 11.1.2 第三方产品免责声明
    2. 11.2 文档支持
      1. 11.2.1 相关文档
    3. 11.3 接收文档更新通知
    4. 11.4 支持资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 Glossary
  12. 12机械、封装和可订购信息
    1. 12.1 Tape and Reel Information

封装选项

机械数据 (封装 | 引脚)
散热焊盘机械数据 (封装 | 引脚)
订购信息

7.3.4.3 Output Capacitor

The required output capacitance is determined by the output voltage of the LMZ31710. See Table 3 for the amount of required capacitance. The effects of temperature and capacitor voltage rating must be considered when selecting capacitors to meet the minimum required capacitance. The required output capacitance can be comprised of all ceramic capacitors, or a combination of ceramic and bulk capacitors. The required capacitance must include at least one 47 µF ceramic. When adding additional non-ceramic bulk capacitors, low-ESR devices like the ones recommended in Table 4 are required. The required capacitance above the minimum is determined by actual transient deviation requirements. See Table 5 for typical transient response values for several output voltage, input voltage and capacitance combinations. Table 4 includes a preferred list of capacitors by vendor.

Table 3. Required Output Capacitance

VOUT RANGE (V) MINIMUM REQUIRED COUT (µF)
MIN MAX
0.6 < 0.8 500 µF(1)
0.8 < 1.2 300 µF(1)
1.2 < 3.0 200 µF(1)
3.0 < 4.0 100 µF(1)
4.0 5.5 47 µF ceramic
(1) Minimum required must include at least one 47 µF ceramic capacitor.

Table 4. Recommended Input/Output Capacitors(1)

VENDOR SERIES PART NUMBER CAPACITOR CHARACTERISTICS
WORKING VOLTAGE
(V)		 CAPACITANCE
(µF)		 ESR(2)
(mΩ)
Murata X5R GRM32ER61E226K 25 22 2
TDK X5R C3225X5R0J107M 6.3 100 2
TDK X5R C3225X5R0J476K 6.3 47 2
Murata X5R GRM32ER60J107M 6.3 100 2
Murata X5R GRM32ER60J476M 6.3 47 2
Panasonic EEH-ZA EEH-ZA1E101XP 25 100 30
Sanyo POSCAP 16TQC68M 16 68 50
Kemet T520 T520V107M010ASE025 10 100 25
Sanyo POSCAP 10TPE220ML 10 220 25
Sanyo POSCAP 6TPE100MI 6.3 100 25
Sanyo POSCAP 2R5TPE220M7 2.5 220 7
Kemet T530 T530D227M006ATE006 6.3 220 6
Kemet T530 T530D337M006ATE010 6.3 330 10
Sanyo POSCAP 2TPF330M6 2.0 330 6
Sanyo POSCAP 6TPE330MFL 6.3 330 15
(1) Capacitor Supplier Verification, RoHS, Lead-free, and Material Details
Consult capacitor suppliers regarding availability, material composition, RoHS and lead-free status, and manufacturing process requirements for any capacitors identified in this table.
(2) Maximum ESR at 100 kHz, 25°C.