ZHCS549K January   2010  – April 2019 LMZ10505

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用
  3. 3 说明
    1.     Device Images
      1.      典型应用电路
      2.      效率 (VOUT = 3.3V)
  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
  7. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Enable
      2. 7.3.2 Enable and UVLO
      3. 7.3.3 Soft-Start
      4. 7.3.4 Soft-Start Capacitor
      5. 7.3.5 Tracking
      6. 7.3.6 Tracking - Equal Soft-Start Time
      7. 7.3.7 Tracking - Equal Slew Rates
      8. 7.3.8 Current Limit
      9. 7.3.9 Overtemperature Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Prebias Start-Up Capability
  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 Input Capacitor Selection
        3. 8.2.2.3 Output Capacitor Selection
          1. 8.2.2.3.1 Output Voltage Setting
        4. 8.2.2.4 Loop Compensation
      3. 8.2.3 Application Curves
    3. 8.3 System Examples
      1. 8.3.1 Application Schematic for 3.3-V to 5-V Input and 2.5-V Output With Optimized Ripple and Transient Response
      2. 8.3.2 Application Schematic for 3.3-V to 5-V Input and 2.5-V Output
      3. 8.3.3 EMI Tested Schematic for 2.5-V Output Based on 3.3-V to 5-V Input
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Estimate Power Dissipation and Thermal Considerations
    4. 10.4 Power Module SMT Guidelines
  11. 11器件和文档支持
    1. 11.1 器件支持
      1. 11.1.1 第三方米6体育平台手机版_好二三四免责声明
      2. 11.1.2 开发支持
        1. 11.1.2.1 使用 WEBENCH® 工具创建定制设计
    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 社区资源
    5. 11.5 商标
    6. 11.6 静电放电警告
    7. 11.7 术语表
  12. 12机械、封装和可订购信息

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

6.5 Electrical Characteristics

Specifications are for TJ = 25°C unless otherwise specified. Minimum and maximum limits are ensured through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C, and are provided for reference purposes only. VIN = VEN = 3.3 V, unless otherwise indicated in the conditions column.
PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT
SYSTEM PARAMETERS
V FB Total Feedback Voltage Variation Including Line and Load Regulation VIN = 2.95 V to 5.5 V
VOUT = 2.5 V
IOUT = 0 A to 5 A		 0.8 V
over the operating junction temperature range TJ of –55°C to 125°C 0.78 0.82
V FB Feedback Voltage Variation VIN = 3.3 V, VOUT = 2.5 V
IOUT = 0 A		 0.8 V
over the operating junction temperature range TJ of –55°C to 125°C 0.787 0.812
V FB Feedback Voltage Variation VIN = 3.3 V, VOUT = 2.5 V
IOUT = 5 A		 0.798 V
over the operating junction temperature range TJ of –55°C to 125°C 0.785 0.81
VIN(UVLO) Input UVLO Threshold (Measured at VIN pin) Rising 2.6 V
over the operating junction temperature range TJ of –55°C to 125°C 2.95
Falling 2.4
over the operating junction temperature range TJ of –55°C to 125°C 1.95
ISS Soft-Start Current Charging Current 2 µA
IQ Non-Switching Input Current VFB = 1 V 1.55 mA
over the operating junction temperature range TJ of –55°C to 125°C 3
ISD Shutdown Quiescent Current VIN = 5.5 V, VEN = 0 V 267 µA
over the operating junction temperature range TJ of –55°C to 125°C 500
IOCL Output Current Limit (Average Current) VOUT = 2.5 V 7.3 A
over the operating junction temperature range TJ of –55°C to 125°C 5.1 8.7
fFB Frequency Fold-back In current limit 250 kHz
PWM SECTION
fSW Switching Frequency 1000 kHz
over the operating junction temperature range TJ of –55°C to 125°C 750 1160
Drange PWM Duty Cycle Range over the operating junction temperature range TJ of –55°C to 125°C 0% 100%
ENABLE CONTROL
VEN-IH EN Pin Rising Threshold 1.23 V
over the operating junction temperature range TJ of –55°C to 125°C 1.8
VEN-IF EN Pin Falling Threshold 1.06 V
over the operating junction temperature range TJ of –55°C to 125°C 0.8
THERMAL CONTROL
TSD TJ for Thermal Shutdown 145 °C
TSD-HYS Hysteresis for Thermal Shutdown 10 °C
PERFORMANCE PARAMETERS
ΔVOUT Output Voltage Ripple Refer to Table 1
VOUT = 2.5 V
Bandwidth Limit = 2 MHz		 10 mVpk-pk
ΔVOUT Output Voltage Ripple Refer to Table 5 Bandwidth Limit = 20 MHz 5 mVpk-pk
ΔVFB / VFB Feedback Voltage Line Regulation ΔVIN = 2.95 V to 5.5 V
IOUT = 0 A		 0.04%
ΔVOUT / VOUT Output Voltage Line Regulation ΔVIN = 2.95 V to 5.5 V
IOUT = 0 A, VOUT = 2.5 V		 0.04%
ΔVFB / VFB Feedback Voltage Load Regulation IOUT = 0 A to 5 A 0.25%
ΔVOUT / VOUT Output Voltage Load Regulation IOUT = 0 A to 5 A
VOUT = 2.5 V		 0.25%
EFFICIENCY
η Peak Efficiency (1A) VIN = 5 V VOUT = 3.3 V 96.1%
VOUT = 2.5 V 94.8%
VOUT = 1.8 V 93.1%
VOUT = 1.5 V 92%
VOUT = 1.2 V 90.4%
VOUT = 0.8 V 86.8%
η Peak Efficiency (1A) VIN = 3.3 V VOUT = 2.5 V 95.75
VOUT = 1.8 V 94.1%
VOUT = 1.5 V 93.0%
VOUT = 1.2 V 91.6%
VOUT = 0.8 V 88.3%
η Full Load Efficiency (3A) VIN = 5 V VOUT = 3.3 V 93.1%
VOUT = 2.5 V 91.2%
VOUT = 1.8 V 88.5%
VOUT = 1.5 V 86.7%
VOUT = 1.2 V 84.1%
VOUT = 0.8 V 78.2%
η Full Load Efficiency (3A) VIN = 3.3 V VOUT = 2.5 V 89.8%
VOUT = 1.8 V 86.9%
VOUT = 1.5 V 85.1%
VOUT = 1.2 V 82.5%
VOUT = 0.8 V 76.2%
(1) Minimum and maximum limits are 100% production tested at an ambient temperature (TA) of 25°C. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. Limits are used to calculate Average Outgoing Quality Level (AOQL).
(2) Typical numbers are at 25°C and represent the most likely parametric norm.
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