ZHCSHT5A July   2011  – March 2018 TPS61256A

PRODUCTION DATA.  

  1. 1 特性
  2. 2 应用范围
  3. 3 说明
    1.     Device Images
      1.      最小解决方案尺寸应用
      2.      效率与负载电流间的关系
  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 Parameter Measurement Information
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Softstart
    3. 8.3 Undervoltage Lockout
    4. 8.4 Thermal Regulation
    5. 8.5 Thermal Shutdown
    6. 8.6 Functional Block Diagram
    7. 8.7 Feature Description
      1. 8.7.1 Power-Save Mode
      2. 8.7.2 Current Limit Operation
      3. 8.7.3 Enable
      4. 8.7.4 Load Disconnect And Reverse Current Protection
    8. 8.8 Device Functional Modes
      1. 8.8.1 Load Disconnect And Reverse Current Protection
      2. 8.8.2 Softstart
      3. 8.8.3 Undervoltage Lockout
      4. 8.8.4 Thermal Regulation
      5. 8.8.5 Thermal Shutdown
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 Inductor Selection
          1. 9.2.2.1.1 High-frequency Converter Applications
        2. 9.2.2.2 Output Capacitor
        3. 9.2.2.3 Input Capacitor
        4. 9.2.2.4 Checking Loop Stability
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Example
    3. 11.3 Thermal Information
  12. 12Package Summary
    1. 12.1 Package Dimensions
  13. 13器件和文档支持
    1. 13.1 器件支持
      1. 13.1.1 第三方产品免责声明
    2. 13.2 接收文档更新通知
    3. 13.3 社区资源
    4. 13.4 商标
    5. 13.5 静电放电警告
    6. 13.6 Glossary
  14. 14机械、封装和可订购信息

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)
  • YFF|9
散热焊盘机械数据 (封装 | 引脚)
订购信息

6.5 Electrical Characteristics

Minimum and maximum values are at VIN = 2.5V to 5.5V, VOUT = 5.0V (or VIN, whichever is higher), EN = 1.8V, TA = –40°C to 85°C; Circuit of Parameter Measurement Information section (unless otherwise noted). Typical values are at VIN = 3.6V, VOUT = 5.0V, EN = 1.8V, TA = 25°C (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY CURRENT
IQ Operating quiescent current
into VIN 		IOUT = 0mA, VOUT = 5.0V, VIN = 3.6V
EN = VIN
Device not switching		 33 45 µA
Operating quiescent current
into VOUT 		7 15 µA
ISD Shutdown current EN = GND 0.85 5.0 μA
VUVLO Under-voltage lockout threshold Falling 2.0 2.1 V
Hysteresis 0.1 V
ENABLE
VIL Low-level input voltage 0.4 V
VIH High-level input voltage 1.0 V
Ilkg Input leakage current Input connected to GND or VIN 0.5 µA
OUTPUT
VOUT DC output voltage accuracy 2.5V ≤ VIN ≤ 4.85V, IOUT = 0mA
PWM operation. Open Loop		 4.92 5.0 5.08 V
2.5V ≤ VIN ≤ 4.85V, 0mA ≤ IOUT ≤ 650mA
3.3V ≤ VIN ≤ 4.85V, 0mA ≤ IOUT ≤ 1000mA
PFM/PWM operation		 4.9 5.0 5.2 V
ΔVOUT Power-save mode output ripple voltage PFM operation, IOUT = 1mA 30 mVpk
PWM mode output ripple voltage PWM operation, IOUT = 200mA 15 mVpk
POWER SWITCH
rDS(on) High-side MOSFET on resistance 170 mΩ
Low-side MOSFET on resistance 100 mΩ
Ilkg Reverse leakage current into VOUT EN = GND 3.5 µA
ILIM Pre-charge current limit 165 215 265 mA
Switch valley current limit EN = VIN. Open Loop 1900 2400 2900 mA
Overtemperature protection 140 °C
Overtemperature hysteresis 20 °C
OSCILLATOR
fOSC Oscillator frequency VIN = 3.6V 3.5 MHz
TIMING
Start-up time IOUT = 0mA
Time from active EN to VOUT 		700 µs