SBVS118 August 2017 TPS7A47-Q1

PRODUCTION DATA. 

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  6. Specifications
    1. 6.1Absolute Maximum Ratings
    2. 6.2ESD Ratings
    3. 6.3Recommended Operating Conditions
    4. 6.4Thermal Information
    5. 6.5Electrical Characteristics
    6. 6.6Typical Characteristics
  7. Detailed Description
    1. 7.1Overview
    2. 7.2Functional Block Diagram
    3. 7.3Feature Description
      1. 7.3.1Internal Current Limit (ICL)
      2. 7.3.2Enable (EN) And Undervoltage Lockout (UVLO)
      3. 7.3.3Soft-Start And Inrush Current
    4. 7.4Device Functional Modes
    5. 7.5Programming
      1. 7.5.1ANY-OUT Programmable Output Voltage
      2. 7.5.2Adjustable Operation
  8. Application and Implementation
    1. 8.1Application Information
    2. 8.2Typical Application
      1. 8.2.1Design Requirements
      2. 8.2.2Detailed Design Procedure
        1. 8.2.2.1Capacitor Recommendations
          1. 8.2.2.1.1Input and Output Capacitor Requirements
          2. 8.2.2.1.2Noise-Reduction Capacitor (CNR)
        2. 8.2.2.2Dropout Voltage (VDO)
        3. 8.2.2.3Output Voltage Accuracy
        4. 8.2.2.4Startup
        5. 8.2.2.5AC Performance
          1. 8.2.2.5.1Power-Supply Rejection Ratio (PSRR)
          2. 8.2.2.5.2Load Step Transient Response
          3. 8.2.2.5.3Noise
      3. 8.2.3Application Curves
  9. Power Supply Recommendations
    1. 9.1Power Dissipation (PD)
  10. 10Layout
    1. 10.1Layout Guidelines
    2. 10.2Layout Example
    3. 10.3Thermal Protection
    4. 10.4Estimating Junction Temperature
  11. 11Device and Documentation Support
    1. 11.1Documentation Support
      1. 11.1.1Related Documentation
    2. 11.2Receiving Notification of Documentation Updates
    3. 11.3Community Resources
    4. 11.4Trademarks
    5. 11.5Electrostatic Discharge Caution
    6. 11.6Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Features

  • Qualified for Automotive Applications
  • AEC-Q100 Qualified With the Following Results:
    • Device Temperature Grade 1: –40°C to 125°C Ambient Operating Temperature Range
    • Device HBM ESD Classification Level 2
    • Device CDM ESD Classification Level C4A
  • Input Voltage: 3 V to 35 V
  • Operating Junction Temperature: –40°C to +145°C
  • Output Voltage Noise:
    4.2 µVRMS (10 Hz–100 kHz)
  • Power-Supply Rejection Ratio:
    • 82 dB (100 Hz)
    • ≥ 55 dB (10 Hz–10 MHz)
  • Two Output Voltage Modes:
    • ANY-OUT™ Version (User-Programmable Output via PCB Layout):
      • Output Voltage: 1.4 V to 20.5 V
    • Adjustable Operation:
      • Output Voltage: 1.4 V to 34 V
  • Output Current: 1 A
  • Thermal resistance: θJA = 31.1°C/W
  • Dropout Voltage: 307 mV at 1 A
  • CMOS Logic Level-Compatible Enable Pin
  • Built-In Fixed Current Limit and
    Thermal Shutdown

Applications

  • Voltage-Controlled Oscillators (VCO)
  • Rx, Tx, and PA Circuitry
  • Automotive Infotainment and Cluster
  • Supply Rails for Operational Amplifiers,
    DACs, ADCs, and Other High-Precision Analog Circuitry

Description

The TPS7A47-Q1 device is a positive voltage (35 V), ultra-low-noise (4.2 µVRMS) low-dropout linear regulator (LDO) capable of sourcing a 1-A load.

The TPS7A47-Q1 output voltage can be configured with a user-programmable printed circuit board (PCB) layout (up to 20.5 V), or adjustable (up to 34 V) with external feedback resistors.

The TPS7A47-Q1 is designed with bipolar technology primarily for high-accuracy, high-precision instrumentation applications where clean voltage rails are critical to maximize system performance. This feature makes the device ideal for powering operational amplifiers, analog-to-digital converters (ADCs), digital-to-analog converters (DACs), and other high-performance analog circuitry.

In addition, the TPS7A47-Q1 is ideal for post dc-dc converter regulation. By filtering out the output voltage ripple inherent to dc-dc switching conversions, maximum system performance is ensured in sensitive instrumentation, audio, and RF applications.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
TPS7A47-Q1VQFN (20)5.00 mm × 5.00 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Simplified Schematic

TPS7A47-Q1 frontpage_sbvs118.gif