SBVS118 August   2017 TPS7A47-Q1

PRODUCTION DATA.  

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

Package Options

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

1 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

2 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

3 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 NUMBER PACKAGE BODY SIZE (NOM)
TPS7A47-Q1 VQFN (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