ZHCSIE9C June   2018  – October 2020 LMR33620-Q1

PRODUCTION DATA  

  1. 1 特性
  2. 2 应用
  3. 3 说明
  4. 4 修订历史记录
  5. 5 Pin Configuration and 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 Timing Characteristics
    7. 6.7 System Characteristics
    8. 6.8 Typical Characteristics
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Power-Good Flag Output
      2. 7.3.2 Enable and Start-up
      3. 7.3.3 Current Limit and Short Circuit
      4. 7.3.4 Undervoltage Lockout and Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Auto Mode
      2. 7.4.2 Dropout
      3. 7.4.3 Minimum Switch On-Time
  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  Choosing the Switching Frequency
        3. 8.2.2.3  Setting the Output Voltage
          1. 8.2.2.3.1 Fixed Output Voltage Option
        4. 8.2.2.4  Inductor Selection
        5. 8.2.2.5  Output Capacitor Selection
        6. 8.2.2.6  Input Capacitor Selection
        7. 8.2.2.7  CBOOT
        8. 8.2.2.8  VCC
        9. 8.2.2.9  CFF Selection
        10. 8.2.2.10 External UVLO
        11. 8.2.2.11 Maximum Ambient Temperature
      3. 8.2.3 Application Curves
    3. 8.3 What to Do and What Not to Do
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Ground and Thermal Considerations
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Custom Design With WEBENCH® Tools
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    3. 11.3 支持资源
    4. 11.4 接收文档更新通知
    5. 11.5 Trademarks
    6. 11.6 静电放电警告
    7. 11.7 术语表

封装选项

请参考 PDF 数据表获取器件具体的封装图。

机械数据 (封装 | 引脚)
  • RNX|12
散热焊盘机械数据 (封装 | 引脚)
订购信息

6.7 System Characteristics

The following specifications apply to a typical applications circuit, with nominal component values. Specifications in the typical (TYP) column apply to TJ = 25°C only. Specifications in the minimum (MIN) and maximum (MAX) columns apply to the case of typical components over the temperature range of TJ = –40°C to 125°C. These specifications are not ensured by production testing. 
PARAMETERTEST CONDITIONSMINTYPMAXUNIT
VINOperating input voltage rangeVOUT = 3.3 V, IOUT= 0 A3.836V
VOUTOutput voltage regulation for VOUT = 5 V(1)VOUT = 5 V, VIN = 7 V to 36 V, IOUT = 0 A to max. load–1.5%2.5%
VOUT = 5 V, VIN = 7 V to 36 V, IOUT = 1 A to max. load–1.5%1.5%
Output voltage regulation for VOUT = 3.3 V(1)VOUT = 3.3 V, VIN = 3.8 V to 36 V, IOUT = 0 A to max. load–1.5%2.5%
VOUT = 3.3 V, VIN = 3.8 V to 36 V, IOUT = 1 A to max. load–1.5%1.5%
ISUPPLYInput supply current when in regulationVIN = 12 V, VOUT = 3.3 V, IOUT = 0 A,
RFBT = 1 MΩ		25µA
VDROPDropout voltage; (VIN – VOUT)VOUT = 5 V, IOUT = 1A
Dropout at –1% of regulation,
ƒSW = 140 kHz		150mV
DMAXMaximum switch duty cycle(2)VIN = VOUT = 12 V, IOUT = 1 A98%
VHCFB pin voltage required to trip short-circuit hiccup mode0.4V
tHCTime between current-limit hiccup burst94ms
tDSwitch voltage dead time2ns
TSDThermal shutdown temperatureShutdown temperature165°C
Recovery temperature148°C
(1) Deviation is with respect to VIN =12 V, IOUT = 1 A.
(2) In dropout the switching frequency drops to increase the effective duty cycle. The lowest frequency is clamped at approximately: ƒMIN = 1 / (tON-MAX + tOFF-MIN). DMAX = tON-MAX /(tON-MAX + tOFF-MIN).
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