SBVS324 June   2017 TPS7A90

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
  4. Revision History
  5. Pin Configuration and Functions
  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. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Output Enable
      2. 7.3.2 Dropout Voltage (VDO)
      3. 7.3.3 Output Voltage Accuracy
      4. 7.3.4 High Power-Supply Rejection Ratio (PSRR)
      5. 7.3.5 Low Output Noise
      6. 7.3.6 Output Soft-Start Control
      7. 7.3.7 Power-Good Function
      8. 7.3.8 Internal Protection Circuitry
        1. 7.3.8.1 Undervoltage Lockout (UVLO)
        2. 7.3.8.2 Internal Current Limit (ICL)
        3. 7.3.8.3 Thermal Protection
    4. 7.4 Device Functional Modes
      1. 7.4.1 Normal Operation
      2. 7.4.2 Dropout Operation
      3. 7.4.3 Disabled
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Adjustable Output
      2. 8.1.2 Start-Up
        1. 8.1.2.1 Enable (EN) and Undervoltage Lockout (UVLO)
        2. 8.1.2.2 Noise-Reduction and Soft-Start Capacitor (CNR/SS)
          1. 8.1.2.2.1 Noise Reduction
          2. 8.1.2.2.2 Soft-Start and In-Rush Current
      3. 8.1.3 Capacitor Recommendation
        1. 8.1.3.1 Input and Output Capacitor Requirements (CIN and COUT)
          1. 8.1.3.1.1 Load-Step Transient Response
        2. 8.1.3.2 Feed-Forward Capacitor (CFF)
      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
  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 Receiving Notification of Documentation Updates
    4. 11.4 Community Resources
    5. 11.5 Trademarks
    6. 11.6 Electrostatic Discharge Caution
    7. 11.7 Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Package Options

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

Features

  • 1.0% Accuracy Over Line, Load, and Temperature
  • Low Output Noise: 4.7 µVRMS (10 Hz–100 kHz)
  • Low Dropout: 100 mV (max) at 0.5 A
  • Wide Input Voltage Range: 1.4 V to 6.5 V
  • Wide Output Voltage Range: 0.8 V to 5.7 V
  • High Power-Supply Rejection Ratio (PSRR):
    • 60 dB at DC
    • 50 dB at 100 kHz
    • 30 dB at 1 MHz
  • Fast Transient Response
  • Adjustable Start-Up In-Rush Control With Selectable Soft-Start Charging Current
  • Open-Drain Power-Good (PG) Output
  • θJC = 3.2ºC/W
  • 2.5-mm × 2.5-mm, 10-Pin WSON Package

Applications

  • High-Speed Analog Circuits:
    • VCO, ADC, DAC, LVDS
  • Imaging: CMOS Sensors, Video ASICs
  • Test and Measurement
  • Instrumentation, Medical, and Audio
  • Digital Loads: SerDes, FPGA, DSP

Description

The TPS7A90 device is a low-noise (4.7 µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 500 mA with only 100 mV of maximum dropout to 5 V and 200 mV to 5.7 V.

The TPS7A90 output is adjustable with external resistors from 0.8 V to 5.7 V. The TPS7A90 wide input voltage range supports operation as low as 1.4 V and up to 6.5 V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A90 is ideal for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), and digital-to-analog converters (DACs)].

The TPS7A90 is designed to power noise-sensitive components such as those found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7-µVRMS output noise and wideband PSRR (30 dB at 1 MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS7A90 WSON (10) 2.50 mm × 2.50 mm
  1. For all available packages, see the orderable addendum at the end of the datasheet.

Typical Application Circuit

TPS7A90 app_cir_SBVS324.gif

Typical Application Diagram

TPS7A90 Typ_App_SBVS324.gif