SLVSD26B April   2016  – April 2021 TPS54202

PRODUCTION DATA  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  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 Requirements
  7. 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  Pulse Skip Mode
      3. 7.3.3  Error Amplifier
      4. 7.3.4  Slope Compensation and Output Current
      5. 7.3.5  Enable and Adjusting Under Voltage Lockout
      6. 7.3.6  Safe Startup into Pre-Biased Outputs
      7. 7.3.7  Voltage Reference
      8. 7.3.8  Adjusting Output Voltage
      9. 7.3.9  Internal Soft-Start
      10. 7.3.10 Bootstrap Voltage (BOOT)
      11. 7.3.11 Overcurrent Protection
        1. 7.3.11.1 High-Side MOSFET Overcurrent Protection
        2. 7.3.11.2 Low-Side MOSFET Overcurrent Protection
      12. 7.3.12 Spread Spectrum
      13. 7.3.13 Output Overvoltage Protection (OVP)
      14. 7.3.14 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Eco-mode Operation
  8. 8 Application and Implementation
    1. 8.1 Application Information
    2. 8.2 Typical Application
      1. 8.2.1 TPS54202 8-V to 28-V Input, 5-V Output Converter
      2. 8.2.2 Design Requirements
      3. 8.2.3 Detailed Design Procedure
        1. 8.2.3.1 Input Capacitor Selection
        2. 8.2.3.2 Bootstrap Capacitor Selection
        3. 8.2.3.3 Output Voltage Set Point
        4. 8.2.3.4 Undervoltage Lockout Set Point
        5. 8.2.3.5 Output Filter Components
          1. 8.2.3.5.1 Inductor Selection
          2. 8.2.3.5.2 Output Capacitor Selection
          3. 8.2.3.5.3 Feed-Forward Capacitor
      4. 8.2.4 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
    2. 11.2 Receiving Notification of Documentation Updates
    3. 11.3 Support Resources
    4. 11.4 Trademarks
    5. 11.5 Electrostatic Discharge Caution
    6. 11.6 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

Mechanical Data (Package|Pins)
Thermal pad, mechanical data (Package|Pins)
Orderable Information

6.5 Electrical Characteristics

The electrical ratings specified in this section apply to all specifications in this document, unless otherwise noted. These specifications are interpreted as conditions that do not degrade the device parametric or functional specifications for the life of the product containing it. TJ = –40°C to +125°C, VIN = 4.5 V to 28 V, (unless otherwise noted).
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY
VIN Input voltage range 4.5 28 V
IQ Non switching quiescent current EN =5 V, VFB = 1 V 45 µA
IOFF Shut down current EN = GND 2 µA
VIN(UVLO) VIN under voltage lockout Rising VIN 3.9 4.2 4.4 V
Falling VIN 3.4 3.7 3.9 V
Hysteresis 400 480 560 mV
ENABLE (EN PIN)
V(EN_RISING) Enable threshold Rising 1.21 1.28 V
V(EN_FALLING) Falling 1.1 1.19 V
I(EN_INPUT) Input current VEN = 1 V 0.7 μA
I(EN_HYS) Hysteresis current VEN = 1.5 V 1.55 μA
FEEDBACK AND ERROR AMPLIFIER
VFB Feedback Voltage VIN = 12 V 0.581 0.596 0.611 V
PULSE SKIP MODE
I(SKIP)(1) Pulse skip mode peak inductor current threshold VIN = 24 V, VOUT = 5 V, L = 15 µH 300 mA
POWER STAGE
R(HSD) High-side FET on resistance TA = 25°C, VBST – SW = 6 V 148 mΩ
R(LSD) Low-side FET on resistance TA = 25°C, VIN = 12 78 mΩ
CURRENT LIMIT
I(LIM_HS) High side current limit 2.5 3.2 3.9 A
I(LIM_LS) Low side source current limit 2 3 4.3 A
OSCILLATOR
Fsw Centre switching frequency 390 500 630 kHz
OVER TEMPERATURE PROTECTION
Thermal Shutdown(1) Rising temperature 155 °C
Hysteresis 10 °C
Hiccup time 32768 Cycles
(1) Not production tested