SLVU944B October   2015  – October 2020 TPS7H1101-SP

 

  1.   Trademarks
  2. 1Introduction
    1. 1.1 Related Documentation
  3. 2Description
  4. 3Test Setup
    1. 3.1 Equipment
      1. 3.1.1 Power Supplies
      2. 3.1.2 Load Number 1
      3. 3.1.3 Meters
      4. 3.1.4 Oscilloscope
    2. 3.2 Bench Test Setup Conditions
      1. 3.2.1 Headers Description and Jumper Placement
      2. 3.2.2 Testing
    3. 3.3 Power-Up Procedure
      1. 3.3.1  IOUT and VOUT Measurements
      2. 3.3.2  Output Current Limiting
      3. 3.3.3  High-Side Current Sense
      4. 3.3.4  Current Foldback
      5. 3.3.5  Power Good
      6. 3.3.6  Dropout Voltage
      7. 3.3.7  Transient Response
      8. 3.3.8  Current Sharing
      9. 3.3.9  Soft-Start
      10. 3.3.10 Enable and Disable
      11. 3.3.11 Turn-Off
  5. 4Board Layout
    1. 4.1 EVM Layout Flexibility
  6. 5Schematic and Bill of Materials
  7.   Revision History

Introduction

This user’s guide describes the characteristics, operation, and use of the TPS7H1101SP evaluation module (EVM). This EVM demonstrates the Texas Instruments TPS7H1101-SP and the TPS7H1101A-SP ultra-low dropout (LDO) regulator.

It is a radiation-hardened LDO linear regulator that uses a PMOS pass element configuration. It operates over a wide range of input voltage, from 1.5 V to 7 V while offering excellent PSRR. The TPS7H1101A-SP features a precise and programmable foldback current limit implementation with a very-wide adjustment range. To support the complex power requirements of FPGAs, DSPs, or microcontrollers, the TPS7H1101A-SP provides enable on and off functionality, programmable soft start, current sharing capability, and a Power Good open-drain output. This user’s guide includes setup instructions, a schematic diagram, a bill of materials (BOM), and PCB layout drawings for the EVM.