ZHCSHM2D June   2018  – April 2025 TPS746-Q1

PRODUCTION DATA  

  1.   1
  2. 1 特性
  3. 2 应用
  4. 3 说明
  5. 4 Pin Configuration and Functions
  6. 5 Specifications
    1. 5.1 Absolute Maximum Ratings
    2. 5.2 ESD Ratings
    3. 5.3 Recommended Operating Conditions
    4. 5.4 Thermal Information
    5. 5.5 Electrical Characteristics
    6. 5.6 Timing Requirements
    7. 5.7 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagrams
    3. 6.3 Feature Description
      1. 6.3.1 Undervoltage Lockout (UVLO)
      2. 6.3.2 Shutdown
      3. 6.3.3 Foldback Current Limit
      4. 6.3.4 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Normal Operation
      2. 6.4.2 Dropout Operation
      3. 6.4.3 Disabled
  8. 7 Application and Implementation
    1. 7.1 Application Information
      1. 7.1.1 Adjustable Device Feedback Resistors
      2. 7.1.2 Input and Output Capacitor Selection
      3. 7.1.3 Dropout Voltage
      4. 7.1.4 Exiting Dropout
      5. 7.1.5 Reverse Current
      6. 7.1.6 Power Dissipation (PD)
      7. 7.1.7 Power-Good Function
      8. 7.1.8 Feed-Forward Capacitor (CFF)
      9. 7.1.9 Start-Up Sequencing
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Input Current
        2. 7.2.2.2 Thermal Dissipation
      3. 7.2.3 Application Curve
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Examples
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Device Nomenclature
    2. 8.2 Documentation Support
      1. 8.2.1 Related Documentation
    3. 8.3 接收文档更新通知
    4. 8.4 支持资源
    5. 8.5 Trademarks
    6. 8.6 静电放电警告
    7. 8.7 术语表
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

5.7 Typical Characteristics

at operating temperature range TJ = 25°C, VIN = VOUT(NOM) + 0.5 V or 1.5 V (whichever is greater), IOUT = 1 mA, VEN = VIN, and CIN = COUT = 1 μF (unless otherwise noted)

TPS746-Q1 3.3-V Line Regulation vs VIN
VOUT = 3.3 V, IOUT = 1 mA
Figure 5-1 3.3-V Line Regulation vs VIN
TPS746-Q1 5.5-V Line Regulation vs VIN
VOUT = 5.5 V, IOUT = 1 mA
Figure 5-3 5.5-V Line Regulation vs VIN
TPS746-Q1 0.55-V Dropout Voltage vs IOUT
 
Figure 5-5 0.55-V Dropout Voltage vs IOUT
TPS746-Q1 VDO vs VOUT
IOUT = 1 A
Figure 5-7 VDO vs VOUT
TPS746-Q1 ISHDN vs VIN
VEN = 0 V
Figure 5-9 ISHDN vs VIN
TPS746-Q1 3.3-V Load Regulation vs IOUT
VIN = 3.8 V, VOUT = 3.3 V
Figure 5-11 3.3-V Load Regulation vs IOUT
TPS746-Q1 5-V Load Regulation vs IOUT
VIN = 6 V, VOUT = 5 V
Figure 5-13 5-V Load Regulation vs IOUT
TPS746-Q1 PGLTH and PGHTH vs Temperature
 
Figure 5-15 PGLTH and PGHTH vs Temperature
TPS746-Q1 VOL(PG) vs PG Pin Sink Current
VIN = 3.8 V, VOUT = 3.3 V
Figure 5-17 VOL(PG) vs PG Pin Sink Current
TPS746-Q1 tPGDH vs Temperature (For TPS746B Only)
 
Figure 5-19 tPGDH vs Temperature (For TPS746B Only)
TPS746-Q1 VEN(HI) and VEN(LO) vs Temperature
 
Figure 5-21 VEN(HI) and VEN(LO) vs Temperature
TPS746-Q1 3.3-V Foldback Current Limit vs IOUT
 
Figure 5-23 3.3-V Foldback Current Limit vs IOUT
TPS746-Q1 3.3-V Line Transient
VOUT = 3.3 V, IOUT = 1 mA, VIN slew rate = 1 V/µs
Figure 5-25 3.3-V Line Transient
TPS746-Q1 1-mA to 1-A Load Transient (5 V)
VOUT = 5 V, VIN = 5.5 V, IOUT slew rate = 1 A/µs
Figure 5-27 1-mA to 1-A Load Transient (5 V)
TPS746-Q1 VIN Power-Up
VIN = 3.8 V, VOUT = 3.3 V, IOUT = 1 mA
Figure 5-29 VIN Power-Up
TPS746-Q1 PSRR vs Frequency and VIN
VOUT = 3.3 V, IOUT = 500 mA, COUT = 2.2 µF
Figure 5-31 PSRR vs Frequency and VIN
TPS746-Q1 PSRR vs Frequency and VIN
VOUT = 3.3 V, IOUT = 250 mA, COUT = 2.2 µF
Figure 5-33 PSRR vs Frequency and VIN
TPS746-Q1 PSRR vs Frequency
IOUT = 500 mA, COUT = 2.2 µF
Figure 5-35 PSRR vs Frequency
TPS746-Q1 PSRR vs Frequency and COUT
VIN = 3.8 V, VOUT = 3.3 V, IOUT = 500 mA
Figure 5-37 PSRR vs Frequency and COUT
TPS746-Q1 PSRR vs Frequency and ILOAD
VIN = 3.8 V, VOUT = 3.3 V, COUT = 2.2 µF
 
Figure 5-39 PSRR vs Frequency and ILOAD
TPS746-Q1 Output Spectral Noise Density vs Frequency and IOUT
VIN = 3.8 V, VOUT = 3.3 V, COUT = 2.2 µF, VRMS BW = 10 Hz to 100 kHz
Figure 5-41 Output Spectral Noise Density vs Frequency and IOUT
TPS746-Q1 Output Spectral Noise Density vs Frequency and COUT
VIN = 3.8 V, VOUT = 3.3 V, IOUT = 100 mA, CFF = 0 µF, VRMS BW = 10 Hz to 100 kHz
Figure 5-43 Output Spectral Noise Density vs Frequency and COUT
TPS746-Q1 0.55-V Line Regulation vs VIN
VOUT = 0.55 V, IOUT = 1 mA
Figure 5-2 0.55-V Line Regulation vs VIN
TPS746-Q1 3.3-V Dropout Voltage vs IOUT
 
Figure 5-4 3.3-V Dropout Voltage vs IOUT
TPS746-Q1 5.5-V Dropout Voltage vs IOUT
 
Figure 5-6 5.5-V Dropout Voltage vs IOUT
TPS746-Q1 IGND vs IOUT
 
Figure 5-8 IGND vs IOUT
TPS746-Q1 IGND vs VIN
VOUT = 3.3 V, IOUT = 0 mA
Figure 5-10 IGND vs VIN
TPS746-Q1 0.55-V Load Regulation vs IOUT
VIN = 2 V, VOUT = 0.55 V
Figure 5-12 0.55-V Load Regulation vs IOUT
TPS746-Q1 VOUT vs IOUT Pulldown Resistor
 
Figure 5-14 VOUT vs IOUT Pulldown Resistor
TPS746-Q1 IIkg(PG) vs Temperature and PG Pin Voltage
 
Figure 5-16 IIkg(PG) vs Temperature and PG Pin Voltage
TPS746-Q1 tPGDH vs Temperature
 
Figure 5-18 tPGDH vs Temperature
TPS746-Q1 tPGDL vs Temperature
 
Figure 5-20 tPGDL vs Temperature
TPS746-Q1 IEN vs VIN
VEN = 5.5 V
Figure 5-22 IEN vs VIN
TPS746-Q1 0.55-V Line Transient
VOUT = 0.55 V, IOUT = 1 mA, VIN slew rate = 1 V/µs
 
Figure 5-24 0.55-V Line Transient
TPS746-Q1 1-mA to 1-A Load Transient (0.55 V)
VOUT = 0.55 V, VIN = 2 V, IOUT slew rate = 1 A/µs
Figure 5-26 1-mA to 1-A Load Transient (0.55 V)
TPS746-Q1 1-mA to 1-A Load Transient (3.3 V)
VOUT = 3.3 V, VIN = 3.8 V, IOUT slew rate = 1 A/µs
Figure 5-28 1-mA to 1-A Load Transient (3.3 V)
TPS746-Q1 Startup With EN
VIN = 3.8 V, VOUT = 3.3 V, IOUT = 1 mA
Figure 5-30 Startup With EN
TPS746-Q1 PSRR vs Frequency and VIN
VOUT = 3.3 V, IOUT = 500 mA, COUT = 2.2 µF
Figure 5-32 PSRR vs Frequency and VIN
TPS746-Q1 PSRR vs Frequency and VIN
VOUT = 3.3 V, IOUT = 250 mA, COUT = 2.2 µF
Figure 5-34 PSRR vs Frequency and VIN
TPS746-Q1 PSRR vs Frequency
IOUT = 1 A, COUT = 2.2 µF
Figure 5-36 PSRR vs Frequency
TPS746-Q1 PSRR vs Frequency and CFF
VIN = 3.8 V, VOUT = 3.3 V, IOUT = 500 mA
Figure 5-38 PSRR vs Frequency and CFF
TPS746-Q1 Output Spectral Noise Density vs Frequency and IOUT
VIN = 3.8 V, VOUT = 3.3 V, COUT = 4.7 µF, VRMS BW = 10 Hz to 100 kHz
Figure 5-40 Output Spectral Noise Density vs Frequency and IOUT
TPS746-Q1 Output Spectral Noise Density vs Frequency and CFF
VIN = 3.8 V, VOUT = 3.3 V, IOUT = 500 mA, COUT = 2.2 µF, VRMS BW = 10 Hz to 100 kHz
Figure 5-42 Output Spectral Noise Density vs Frequency and CFF
TPS746-Q1 Output Spectral Noise Density vs Frequency
IOUT = 500 mA, COUT = 2.2 µF, VRMS BW = 10 Hz to 100 kHz
 
Figure 5-44 Output Spectral Noise Density vs Frequency