SLUSFG9A April   2024  – June 2024 TPS561243 , TPS561246

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  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 Typical Characteristics
  7. 6 Detailed Description
    1. 6.1 Overview
    2. 6.2 Functional Block Diagram
    3. 6.3 Feature Description
      1. 6.3.1 Adaptive On-Time Control and PWM Operation
      2. 6.3.2 Eco-mode Control
      3. 6.3.3 Soft Start and Prebiased Soft Start
      4. 6.3.4 Large Duty Operation
      5. 6.3.5 Current Protection
      6. 6.3.6 Enable Circuit
      7. 6.3.7 Undervoltage Lockout (UVLO) Protection
      8. 6.3.8 Thermal Shutdown
    4. 6.4 Device Functional Modes
      1. 6.4.1 Eco-mode Operation
      2. 6.4.2 FCCM Mode Operation
  8. 7 Application and Implementation
    1. 7.1 Application Information
    2. 7.2 Typical Application
      1. 7.2.1 Design Requirements
      2. 7.2.2 Detailed Design Procedure
        1. 7.2.2.1 Custom Design With WEBENCH® Tools
        2. 7.2.2.2 Output Voltage Resistors Selection
        3. 7.2.2.3 Output Filter Selection
        4. 7.2.2.4 Input Capacitor Selection
        5. 7.2.2.5 Bootstrap Capacitor Selection
      3. 7.2.3 Application Curves
    3. 7.3 Power Supply Recommendations
    4. 7.4 Layout
      1. 7.4.1 Layout Guidelines
      2. 7.4.2 Layout Example
  9. 8 Device and Documentation Support
    1. 8.1 Device Support
      1. 8.1.1 Development Support
        1. 8.1.1.1 Custom Design With WEBENCH® Tools
    2. 8.2 Receiving Notification of Documentation Updates
    3. 8.3 Support Resources
    4. 8.4 Trademarks
    5. 8.5 Electrostatic Discharge Caution
    6. 8.6 Glossary
  10. 9 Revision History
  11. 10Mechanical, Packaging, and Orderable Information

Package Options

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

5.5 Electrical Characteristics

Over operating TJ = –40oC - 125oC, VIN = 12 V (unless otherwise noted)
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
INPUT SUPPLY VOLTAGE
VIN Input voltage range 4.2 17 V
IVIN VIN supply current No load, VEN = 1.5 V, non-switching, ECO version 110 µA
No load, VEN = 1.5 V, VFB = 0.9 V, FCCM version (1) 350 µA
IINSDN VIN shutdown current VEN = 0 V 7 µA
UVLO
UVLO VIN undervoltage lockout Wake up VIN voltage 3.6 3.8 4 V
UVLO VIN undervoltage lockout Shut down VIN voltage 3.2 3.4 3.6 V
UVLO VIN undervoltage lockout Hysteresis VIN voltage 400 mV
FEEDBACK VOLTAGE
VFB FB voltage TJ = 25°C, Vin = 4.2 - 17 V 591 600 609 mV
VFB FB voltage TJ = –40°C to 125°C, Vin = 4.2 - 17 V 588 600 612 mV
MOSFET
RDS (ON)HI High-side MOSFET Rds(on) TJ = 25°C 100 mΩ
RDS (ON)LO Low-side MOSFET Rds(on) TJ = 25°C 55 mΩ
DUTY CYCLE and FREQUENCY CONTROL
FSW Switching frequency  VOUT  = 3.3 V 1280 kHz
TOFF(MIN) Minimum off-time (1) VFB = 0.5 V 100 ns
TON(MIN) Minimum on-time (1) 55 ns
CURRENT LIMIT
IOCL_LS Over current threshold Valley current set point  1.2 2.8 3.6 A
INOCL Negative over current threshold Valley current set point 1 1.8 2.5 A
LOGIC THRESHOLD
VEN(ON) EN threshold high-level 1.15 1.2 1.28 V
VEN(OFF) EN threshold low-level 0.93 1 1.05 V
VENHYS EN hystersis 200 mV
OUTPUT DISCHARGE and SOFT START
IEN EN pulldown current  VEN = 1.5 V 1 uA
tSS Internal soft start time VOUT from 0 to target value.  1.4 ms
OUTPUT UNDERVOLTAGE AND OVERVOLTAGE PROTECTION
VUVP UVP trip threshold 55 60 65 %
tUVPDLY UVP prop deglitch 256 us
tUVPON In continus hiccup mode, the switching time Hard short, UVP detect 1.5 ms
tUVPOFF In continus hiccup mode, non switching time Hard short, UVP detect 13 ms
THERMAL PROTECTION
TOTP OTP trip threshold 155 °C
TOTPHSY OTP hysteresis 20 °C
(1) Specified by design