SLVSDJ0E May   2016  – January 2021 TPS25940-Q1

PRODMIX  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Device Comparison Table
  6. 6 Pin Configuration and Functions
  7. 7 Specifications
    1. 7.1 Absolute Maximum Ratings
    2. 7.2 ESD Ratings
    3. 7.3 Recommended Operating Conditions
    4. 7.4 Thermal Information
    5. 7.5 Electrical Characteristics
    6. 7.6 Timing Requirements
    7. 7.7 Typical Characteristics
  8. 8 Parametric Measurement Information
  9. 9 Detailed Description
    1. 9.1 Overview
    2. 9.2 Functional Block Diagram
    3. 9.3 Feature Description
      1. 9.3.1 Enable and Adjusting Undervoltage Lockout
      2. 9.3.2 Overvoltage Protection (OVP)
      3. 9.3.3 Hot Plug-In and In-Rush Current Control
      4. 9.3.4 Overload and Short Circuit Protection
        1. 9.3.4.1 Overload Protection
        2. 9.3.4.2 Short Circuit Protection
        3. 9.3.4.3 Start-Up with Short on Output
        4. 9.3.4.4 Constant Current Limit Behavior During Overcurrent Faults
      5. 9.3.5 FAULT Response
      6. 9.3.6 Current Monitoring
      7. 9.3.7 Power Good Comparator
      8. 9.3.8 IN, OUT and GND Pins
      9. 9.3.9 Thermal Shutdown
    4. 9.4 Device Functional Modes
      1. 9.4.1 DevSleep Mode
      2. 9.4.2 Shutdown Control
  10. 10Application and Implementation
    1. 10.1 Application Information
    2. 10.2 Typical Application
      1. 10.2.1 Design Requirements
      2. 10.2.2 Detailed Design Procedure
        1. 10.2.2.1 Step by Step Design Procedure
        2. 10.2.2.2 Programming the Current-Limit Threshold: R(ILIM) Selection
        3. 10.2.2.3 Undervoltage Lockout and Overvoltage Set Point
        4. 10.2.2.4 Programming Current Monitoring Resistor—RIMON
        5. 10.2.2.5 Setting Output Voltage Ramp Time (tdVdT)
          1. 10.2.2.5.1 Case1: Start-Up Without Load: Only Output Capacitance C(OUT) Draws Current During Start-Up
          2. 10.2.2.5.2 Case 2: Start-Up With Load: Output Capacitance C(OUT) and Load Draws Current During Start-Up
        6. 10.2.2.6 Programing the Power Good Set Point
        7. 10.2.2.7 Support Component Selections—R6, R7 and CIN
      3. 10.2.3 Application Curves
      4. 10.2.4 System Examples
        1. 10.2.4.1 VBUS Short-to-Battery, Short-to-Ground Protection of USB Port in Automotive Systems
        2. 10.2.4.2 Power Failure Protection for Holdup Power
        3. 10.2.4.3 Overload Detection Using TPS25940xx-Q1
  11. 11Power Supply Recommendations
    1. 11.1 Transient Protection
    2. 11.2 Output Short-Circuit Measurements
  12. 12Layout
    1. 12.1 Layout Guidelines
    2. 12.2 Layout Example
  13. 13Device and Documentation Support
    1. 13.1 Documentation Support
      1. 13.1.1 Related Documentation
    2. 13.2 Support Resources
    3. 13.3 Trademarks
    4. 13.4 Electrostatic Discharge Caution
    5. 13.5 Glossary
  14. 14Mechanical, Packaging, and Orderable Information

Package Options

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

7.7 Typical Characteristics

Conditions are –40°C ≤ TA = TJ ≤ 125°C, V(IN) = 12 V, V(EN/UVLO) = 2 V, V(OVP) = V(DEVSLP) = V(PGTH) = 0 V, R(ILIM) = 150 kΩ, C(OUT) = 1 µF, C(dVdT) = OPEN, PGOOD = FLT = IMON = OPEN. (unless stated otherwise)

GUID-C53FD460-9853-40E9-BD57-D17CCBBCB5A3-low.pngFigure 7-1 UVLO Threshold Voltage vs Temperature
GUID-297A1843-90A8-4BF8-97FA-F73C60875427-low.pngFigure 7-3 Input Supply Current vs Supply Voltage at Shutdown
GUID-A59E550D-163E-483E-9E1C-CFC4561C1DC4-low.pngFigure 7-5 EN Threshold Voltage vs Temperature
GUID-AB3136D6-1A01-4ACD-9B42-F8225092ECE1-low.pngFigure 7-7 PGTH Threshold Voltage vs Temperature
GUID-76E615B9-CD14-4547-B04B-92ABBAB7F2BE-low.pngFigure 7-9 Enable Turn ON Delay vs Temperature
GUID-87ABE055-E4DF-44B1-8E24-9D80FE7B3B51-low.pngFigure 7-11 OVP Disable Delay vs Temperature
GUID-0C5551CC-000D-4DA6-AC29-7D89DD42AB61-low.pngFigure 7-13 DEVSLP Pull Down Current vs Temperature
GUID-389BC35B-1D93-4110-BE6E-5E587C6264D5-low.pngFigure 7-15 Output Ramp Time vs C(dVdT)
GUID-3E5C67C7-F247-4DA8-9E59-9F923F0BDE26-low.pngFigure 7-17 Current Limit Accuracy vs Current Limit
GUID-DA706BE3-5418-4A12-A32D-83BE1A7C8632-low.gifFigure 7-19 Current Limit (% Normalized) vs R(LIMIT) Resistor
GUID-DAB99C97-BCA4-4B67-972D-D5F12F081CCC-low.pngFigure 7-21 Current Limit for R(ILIM) = Open and Short vs Temperature
GUID-44A813A9-2A13-45CA-B160-32C2FE7084DA-low.pngFigure 7-23 Fast Trip Threshold vs Current Limit
GUID-FDA4879D-3E28-4493-B6DC-06F4374466C2-low.pngFigure 7-25 GAIN(IMON) vs Temperature
GUID-0E4A1276-F8D2-4266-ADB4-898E8F93C955-low.pngFigure 7-27 RON vs Temperature Across Load Current
GUID-3E707584-3693-46F9-BA5A-0264F5013B9D-low.gifFigure 7-29 V(REVTH) vs Temperature
GUID-528A4EE4-BF27-4C9A-A02F-1DCE85FD45A4-low.png
Taken on 2-Layer board, 2 oz.(0.08-mm thick) with GND plane area: 14 cm2 (Top) and 20 cm2 (bottom)
Figure 7-31 Thermal Shutdown Time vs Power Dissipation
GUID-B9324BD1-E16B-4F02-9F02-2B387237CE28-low.png
V(IN) = 11 V
Figure 7-33 Turn ON and OFF with Enable
GUID-8A5D9346-4B60-4617-BB12-2867E305B0E1-low.png
R( FLT)=100 kΩ
Figure 7-35 EN Turn OFF Delay : EN ↓ to Fault ↓
GUID-D7EC4D0C-2D70-4171-B815-34BD34A9A186-low.png
V(IN) = 12 V RL = 12 Ω R( FLT)=100 kΩ
Figure 7-37 OVP Turn ON Delay: OVP ↓ to Output Ramp ↑
GUID-A33F1877-0E95-4369-8F44-264BF2FC3976-low.png
V(IN) = 12 V RL = 12 Ω R( FLT)= 100 kΩ
Figure 7-39 Power Good Delay (Falling)
GUID-514021E8-A61F-419A-871B-99A4E4FD56BA-low.png
R( FLT)= 100 kΩ R(IMON) = 16.9 kΩ R(ILIM) = 17.8 kΩ
Figure 7-41 Hot-Short: Fast Trip Response (Zoomed)
GUID-E17CC563-5EEA-4BBA-869F-CFD45BBA7F26-low.pngFigure 7-2 Input Supply Current vs Supply Voltage During Normal Operation
GUID-C2F40123-E178-460A-8F7F-E0F821CD03BF-low.pngFigure 7-4 Input Supply Current vs Supply Voltage in DevSleep Mode
GUID-3DDD2227-BF02-40D7-B2D0-038A783DFA2A-low.pngFigure 7-6 OVP Threshold Voltage vs Temperature
GUID-8BA84EF7-27B9-4400-9758-A0D95D72EE82-low.pngFigure 7-8 EN Threshold Voltage for Low IQ Mode vs Temperature
GUID-74FD52E5-69C8-4AD4-89FD-D9C0E1082FAD-low.pngFigure 7-10 Enable Turn OFF Delay vs Temperature
GUID-40BDAA62-94B3-432A-B838-5B7CAB3DF287-low.pngFigure 7-12 DEVSLP Threshold Voltage vs Temperature
GUID-E8993835-0E9A-4D32-9D33-AA3F358257E2-low.pngFigure 7-14 GAIN(dVdT) vs Temperature
GUID-2A18C30F-012B-4F13-BE16-93644EFFB5A5-low.pngFigure 7-16 Current Limit vs Current Limit Resistor
GUID-8EE5DC0C-9DB6-49B0-B4A6-77D16018A608-low.gifFigure 7-18 Current Limit vs Temperature Across R(ILIM)
GUID-E03BC30D-D746-4761-B9ED-4B2EC6490C6B-low.png
Thermal shutdown occurs when I(LIM) = 5.3 A[V(IN) - V(OUT)] > 8 V
Figure 7-20 Current Limit Normalized (%) vs V(IN) – V(OUT)
GUID-CD1773EB-B143-4659-900B-6126021DC9EA-low.pngFigure 7-22 Current Limit in DevSleep Mode vs Temperature
GUID-CB099EC5-F2DE-48BD-A00D-DD2A0A5C6E20-low.gifFigure 7-24 IMON Offset vs Temperature
GUID-69322A3B-8880-4726-A331-A2FC71AC4993-low.pngFigure 7-26 Current Monitor Output vs Output Current
GUID-06D1D176-1B10-458E-8D8B-83F4F967365F-low.pngFigure 7-28 OUT Leakage Current in Off State vs Temperature
GUID-2CC3E097-36E3-4525-A321-CF1C7C167F14-low.pngFigure 7-30 V(FWDTH) vs Temperature
GUID-0E98F652-60F1-45C4-B9B8-4C63DBE4AEC5-low.png
V(IN) = 4.5 V
Figure 7-32 Turn ON with Enable
GUID-1E61639F-CC0F-4FAA-8C95-3840753D9B88-low.png
R( FLT)=100 kΩ
Figure 7-34 EN Turn ON Delay : EN ↑ to Output Ramp ↑
GUID-41F980BC-4345-4D4E-9E50-3263ADE0FADF-low.png
V(IN) = 12 VRL = 12 ΩR( FLT)=100 kΩ
Figure 7-36 OVP Turn OFF Delay: OVP ↑ to Fault ↓
GUID-A17118AA-343E-47A2-AF89-C855BAA357C9-low.png
V(IN) = 12 V RL = 12 Ω R( FLT)= 100 kΩ
Figure 7-38 Power Good Delay (Rising)
GUID-94BB5003-BDD4-4FC9-A9D2-DF0EA0AAE1B0-low.png
R( FLT) = 100 kΩ R(IMON) = 16.9 kΩ R(ILIM) = 17.8 kΩ
Figure 7-40 Hot-Short: Fast Trip Response and Current Regulation