SLUSFD2B September   2023  – March 2024 TPSM861252 , TPSM861253 , TPSM861257

PRODUCTION DATA  

  1.   1
  2. 1 Features
  3. 2 Applications
  4. 3 Description
  5. 4 Family Devices
  6. 5 Pin Configuration and Functions
  7. 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 Typical Characteristics
  8. 7 Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 PWM Operation and D-CAP3™ Control Mode
      2. 7.3.2 Eco-mode Control
      3. 7.3.3 Soft Start and Prebiased Soft Start
      4. 7.3.4 Overvoltage Protection
      5. 7.3.5 Frequency
      6. 7.3.6 Large Duty Operation
      7. 7.3.7 Current Protection and Undervoltage Protection
      8. 7.3.8 Undervoltage Lockout (UVLO) Protection
      9. 7.3.9 Thermal Shutdown
    4. 7.4 Device Functional Modes
      1. 7.4.1 Eco-mode Operation
      2. 7.4.2 FCCM Mode Operation
  9. 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 Custom Design with WEBENCH® Tools
        2. 8.2.2.2 Output Voltage Resistors Selection
        3. 8.2.2.3 Output Filter Selection
        4. 8.2.2.4 Input Capacitor Selection
        5. 8.2.2.5 Enable Circuit
      3. 8.2.3 Application Curves
    3. 8.3 Power Supply Recommendations
    4. 8.4 Layout
      1. 8.4.1 Layout Guidelines
      2. 8.4.2 Layout Example
  10. 9 Device and Documentation Support
    1. 9.1 Device Support
      1. 9.1.1 Development Support
        1. 9.1.1.1 Custom Design with WEBENCH® Tools
    2. 9.2 Receiving Notification of Documentation Updates
    3. 9.3 Support Resources
    4. 9.4 Trademarks
    5. 9.5 Electrostatic Discharge Caution
    6. 9.6 Glossary
  11. 10Revision History
  12. 11Mechanical, Packaging, and Orderable Information

Package Options

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

5 Pin Configuration and Functions

GUID-20230725-SS0I-24NW-DMMT-4MTCGVSKPCBD-low.svgFigure 5-1 TPSM861252 and TPSM861257 RDX Package, 7-Pin QFN-FCMOD (Top View)
GUID-20230725-SS0I-9LDW-9CZB-DSTMNBLSMF7D-low.svgFigure 5-2 TPSM861253 RDX Package, 7-Pin QFN-FCMOD (Top View)
Table 5-1 Pin Functions
PinType(1)Description
NameNO.
VIN1PInput voltage supply pin. Connect the input decoupling capacitors between VIN and GND.
SW2NCSwitch pin of the power stage. Do not connect, leave floating.
VOUT3POutput connection. Connect recommended output capacitance from VOUT to PGND.
PGND4GPower ground connection
PG5APower-good open drain output. PG pin can be floating.
EN6AEnable pin of buck converter. Drive EN high to turn on the converter; drive EN low to turn off the converter. Internal pulldown to GND by a resistance.
FB7AConverter feedback input for TPSM861252 and TPSM861257. Connect to the center top of the resistor divider between output voltage and ground.
VOS7AConverter feedback input for TPSM861253. Connect to output voltage directly.
(1) A = Analog, P = Power, G = Ground