SBVS197F May   2013  – October 2015 TPS7A8300

PRODUCTION DATA.  

  1. 1 Features
  2. 2 Applications
  3. 3 Description
  4. 4 Revision History
  5. 5 Pin Configurations 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 ANY-OUT Programmable Output Voltage
      2. 7.3.2 Adjustable Operation
      3. 7.3.3 ANY-OUT Operation
      4. 7.3.4 2-A LDO with an Internal Charge Pump
        1. 7.3.4.1 Dropout Voltage (VDO)
        2. 7.3.4.2 Output Voltage Accuracy
        3. 7.3.4.3 Internal Charge Pump
      5. 7.3.5 Low-Noise, 0.8-V Reference
      6. 7.3.6 Internal Protection Circuitry
        1. 7.3.6.1 Undervoltage Lockout (UVLO)
        2. 7.3.6.2 Internal Current Limit (I(LIM))
        3. 7.3.6.3 Thermal Protection
      7. 7.3.7 Programmable Soft-Start
      8. 7.3.8 Power-Good Function
      9. 7.3.9 Integrated Resistance Network (ANY-OUT)
    4. 7.4 Device Functional Modes
      1. 7.4.1 Operation with 1.1 V > VIN > 1.4 V
      2. 7.4.2 Operation with 1.4 V ≥ VIN > 6.5 V
      3. 7.4.3 Disabled
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Start-Up
        1. 8.1.1.1 Enable (EN) and Undervoltage Lockout (UVLO)
        2. 8.1.1.2 Noise-Reduction and Soft-Start Capacitor (CNR/SS)
        3. 8.1.1.3 Soft-Start and Inrush Current
      2. 8.1.2 Capacitor Recommendation
        1. 8.1.2.1 Input and Output Capacitor Requirements (CIN and COUT)
        2. 8.1.2.2 Feed-Forward Capacitor (CFF)
      3. 8.1.3 AC Performance
        1. 8.1.3.1 Power-Supply Ripple Rejection (PSRR)
        2. 8.1.3.2 Load-Step Transient Response
        3. 8.1.3.3 Noise
        4. 8.1.3.4 Behavior when Transitioning from Steady Dropout into Regulation
      4. 8.1.4 Power Dissipation (PD)
      5. 8.1.5 Estimating Junction Temperature
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
      3. 8.2.3 Application Curves
    3. 8.3 Do's and Don'ts
  9. 9 Power-Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
      1. 10.1.1 Board Layout
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Development Support
        1. 11.1.1.1 Evaluation Modules
        2. 11.1.1.2 Spice Models
      2. 11.1.2 Device Nomenclature
    2. 11.2 Documentation Support
      1. 11.2.1 Related Documentation
    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

1 Features

  • Ultralow Dropout: 125 mV Maximum at 2 A
  • Output Voltage Noise: 6 µVRMS
  • Power-Supply Ripple Rejection:
    • 40 dB at 1 MHz
  • Input Voltage Range:
    • Without BIAS: 1.4 V to 6.5 V
    • With BIAS: 1.1 V to 6.5 V
  • Two Output Voltage Modes:
    • ANY-OUT™ Version (User-Programmable Output via PCB Layout):
      • No External Resistor Required
      • Output Voltage Range: 0.8 V to 3.95 V
    • Adjustable Version:
      • Output Voltage Range: 0.8 V to 5.0 V
  • 1.0% Accuracy Over Line, Load, and Temperature
  • Stable with a 22-µF Output Ceramic Capacitor
  • Programmable Soft-Start Output
  • Power-Good (PG) Output
  • Available Packages:
    • 5-mm × 5-mm VQFN-20
    • 3.5-mm × 3.5-mm VQFN-20

2 Applications

  • RF, IF Components: VCO, ADC, DAC, LVDS
  • Wireless Infrastructure: SerDes, FPGA, DSP™
  • Test and Measurement
  • Instrumentation, Medical, and Audio

Application Example

TPS7A8300 alt_sbvs197.gif

3 Description

The TPS7A8300 is a low-noise (6 µVRMS), low-dropout voltage regulator (LDO) capable of sourcing a 2-A load with only 125 mV of maximum dropout.

The TPS7A8300 output voltages are fully user-adjustable (up to 3.95 V) using a printed circuit board (PCB) layout without the need of external resistors, thus reducing overall component count. For higher output voltage applications, the device achieves output voltages up to 5 V with the use of external resistors. The device supports very low input voltages (down to 1.1 V) with the use of an additional BIAS rail.

With very high accuracy (1% over line, load, and temperature), remote sensing, and soft-start capabilities to reduce inrush current, the TPS7A8300 is ideal for powering high-current, low-voltage devices such as high-end microprocessors and field-programmable gate arrays (FPGAs).

The TPS7A8300 is designed to power-up noise-sensitive components in high-speed communication applications. The very low-noise, 6-µVRMS device output and high broad-bandwidth PSRR (40 dB at
1 MHz) minimizes phase noise and clock jitter in high-frequency signals. These features maximize performance of clocking devices, analog-to-digital converters (ADCs), and digital-to-analog converters (DACs).

For applications where positive and negative low-noise rails are required, consider TI's TPS7A33 family of negative high-voltage, ultralow-noise linear regulators.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS7A8300 VQFN (20) 5.00 mm × 5.00 mm
VQFN (20) 3.50 mm × 3.50 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

4 Revision History

Changes from E Revision (August 2014) to F Revision

  • Added title to page 1 graphic Go
  • Updated ESD Ratings table to current standards Go
  • Changed Figure 52: changed connection of EN pin Go
  • Changed Enable (EN) and Undervoltage Lockout (UVLO) section: updated wording for better clarity on use of the Enable (EN) pin Go

Changes from D Revision (February 2013) to E Revision

  • Changed format to meet latest data sheet standards; added new sections, and moved existing sectionsGo
  • Changed first ANY-OUT sub-bullet of fifth Features bullet Go
  • Changed eighth Features bullet: broke Soft-Start Output and PG Output into two separate Features bullets Go
  • Changed first sentence of second paragraph in Description section Go
  • Changed RGW and RGR drawings: removed spacing between number and unit in pins 5 to 7 and 9 to 11 Go
  • Changed first row of Pin Functions table: deleted spacing between number and unit in pin namesGo
  • Added capacitor value to BIAS pin description in Pin Functions tableGo
  • Changed 87% to 89% in the PG pin description of the Pin Functions tableGo
  • Changed thermal pad description in Pin Functions tableGo
  • Changed conditions statements for Absolute Maximum Ratings and Recommended Operating Conditions tables Go
  • Added Recommended Operating Conditions tableGo
  • Changed the Typical Characteristics section: changed all curve titles and conditions Go
  • Changed title of Figure 11 Go
  • Added Overview section Go
  • Changed second paragraph of Overview section: changed that can be groups, as follows to including Go
  • Changed functional block diagram footnoteGo
  • Added Feature Description sectionGo
  • Changed adjustable version to adjustable configuration in first paragraph of Adjustable Operation section Go
  • Changed Figure 51: removed right-hand side diagramGo
  • Added Figure 52 Go
  • Changed second sentence in Internal Charge Pump section Go
  • Changed last sentence of UVLO sectionGo
  • Changed oscillates to cycles in first paragraph of Thermal Protection sectionGo
  • Changed first sentence of Programmable Soft-Start sectionGo
  • Added Device Functional Modes sectionGo
  • Added Application Information section Go
  • Changed second paragraph of Noise sectionGo
  • Added Typical Application section Go
  • Added Figure 57 Go

Changes from C Revision (July 2013) to D Revision

  • Changed document status from Mixed to Production DataGo
  • Deleted footnote from second sub-bullet of last Features bulletGo
  • Deleted footnote from RGR package drawingGo
  • Changed GND pin description in Pin Descriptions tableGo

Changes from B Revision (July 2013) to C Revision

  • Deleted PG Functionality sectionGo
  • Changed Power-Good sectionGo
  • Changed text in Feed-Forward Capacitor subsectionGo

Changes from A Revision (June 2013) to B Revision

  • Changed from product preview to production data (mixed status)Go

Changes from * Revision (May 2013) to A Revision

  • Changed product preview data sheetGo