SLVS875C January   2009  – November 2014 TPS54332

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simplified Schematic
      2.      Efficiency
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin Functions
  6. Specifications
    1. 6.1 Absolute Maximum Ratings
    2. 6.2 Handling Ratings
    3. 6.3 Recommended Operating Conditions
    4. 6.4 Thermal Information
    5. 6.5 Electrical Characteristics
    6. 6.6 Switching Characteristics
    7. 6.7 Typical Characteristics: Characterization Curves
    8. 6.8 Typical Characteristics: Supplemental Application Curves
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1  Fixed Frequency PWM Control
      2. 7.3.2  Voltage Reference (Vref)
      3. 7.3.3  Bootstrap Voltage (BOOT)
      4. 7.3.4  Enable and Adjustable Input Undervoltage Lockout (VIN UVLO)
      5. 7.3.5  Programmable Slow-Start Using SS Pin
      6. 7.3.6  Error Amplifier
      7. 7.3.7  Slope Compensation
      8. 7.3.8  Current Mode Compensation Design
      9. 7.3.9  Overcurrent Protection and Frequency Shift
      10. 7.3.10 Overvoltage Transient Protection
      11. 7.3.11 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation With VIN < 3.5 V
      2. 7.4.2 Operation With EN Control
      3. 7.4.3 Eco-Mode
  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  Switching Frequency
        2. 8.2.2.2  Output Voltage Set Point
        3. 8.2.2.3  Input Capacitors
        4. 8.2.2.4  Output Filter Components
        5. 8.2.2.5  Inductor Selection
        6. 8.2.2.6  Capacitor Selection
        7. 8.2.2.7  Compensation Components
        8. 8.2.2.8  Bootstrap Capacitor
        9. 8.2.2.9  Catch Diode
        10. 8.2.2.10 Output Voltage Limitations
        11. 8.2.2.11 Power Dissipation Estimate
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Estimated Circuit Area
    4. 10.4 Electromagnetic Interference (EMI) Considerations
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable 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

Electrical Characteristics

TJ = –40°C to 150°C, VIN = 3.5 V to 28 V (unless otherwise noted)
DESCRIPTION TEST CONDITIONS MIN TYP MAX UNIT
SUPPLY VOLTAGE (VIN PIN)
Internal undervoltage lockout threshold Rising and Falling 3.5 V
Shutdown supply current EN = 0 V, VIN = 12 V, –40°C to 85°C 1 4 μA
Operating – non switching supply current VSENSE = 0.85 V 82 120 μA
ENABLE AND UVLO (EN PIN)
Enable threshold Rising and Falling 1.25 1.35 V
Input current Enable threshold – 50 mV -1 μA
Input current Enable threshold + 50 mV -4 μA
VOLTAGE REFERENCE
Voltage reference 0.772 0.8 0.828 V
HIGH-SIDE MOSFET
On resistance BOOT-PH = 3 V, VIN = 3.5 V 115 200 mΩ
BOOT-PH = 6 V, VIN = 12 V 80 150
ERROR AMPLIFIER
Error amplifier transconductance (gm) –2 μA < ICOMP < 2 μA, V(COMP) = 1 V 92 μmhos
Error amplifier DC gain(1) VSENSE = 0.8 V 800 V/V
Error amplifier unity gain bandwidth(1) 5 pF capacitance from COMP to GND pins 2.7 MHz
Error amplifier source/sink current V(COMP) = 1.0 V, 100-mV overdrive ±7 μA
Switch current to COMP transconductance VIN = 12 V 12 A/V
PULSE-SKIPPING ECO-MODE
Pulse-skipping Eco-Mode switch current threshold 160 mA
CURRENT LIMIT
Current limit threshold VIN = 12 V 4.2 6.5 A
THERMAL SHUTDOWN
Thermal Shutdown 165 °C
SLOW-START (SS PIN)
Charge current V(SS) = 0.4 V 2 μA
SS to VSENSE matching V(SS) = 0.4 V 10 mV
Specified by design