SBVS289A August 2017  – September 2017 TPS7A88-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. 7.3.1Voltage Regulation Features
        1. 7.3.1.1DC Regulation
        2. 7.3.1.2AC and Transient Response
      2. 7.3.2System Start-Up Features
        1. 7.3.2.1Programmable Soft-Start (NR/SSx)
        2. 7.3.2.2Sequencing
          1. 7.3.2.2.1Enable (ENx)
          2. 7.3.2.2.2Undervoltage Lockout (UVLOx) Control
          3. 7.3.2.2.3Active Discharge
        3. 7.3.2.3Power-Good Output (PGx)
      3. 7.3.3Internal Protection Features
        1. 7.3.3.1Foldback Current Limit (ICLx)
        2. 7.3.3.2Thermal Protection (Tsdx)
    4. 7.4Device Functional Modes
      1. 7.4.1Regulation
      2. 7.4.2Disabled
  8. Application and Implementation
    1. 8.1Application Information
      1. 8.1.1External Component Selection
        1. 8.1.1.1Setting the Output Voltage (Adjustable Operation)
        2. 8.1.1.2Capacitor Recommendations
        3. 8.1.1.3Input and Output Capacitor (CINx and COUTx)
        4. 8.1.1.4Feedforward Capacitor (CFFx)
        5. 8.1.1.5Noise-Reduction and Soft-Start Capacitor (CNR/SSx)
      2. 8.1.2Start-Up
        1. 8.1.2.1Circuit Soft-Start Control (NR/SSx)
          1. 8.1.2.1.1In-Rush Current
        2. 8.1.2.2Undervoltage Lockout (UVLOx) Control
        3. 8.1.2.3Power-Good (PGx) Function
      3. 8.1.3AC and Transient Performance
        1. 8.1.3.1 Power-Supply Rejection Ratio (PSRR)
        2. 8.1.3.2Channel-to-Channel Output Isolation and Crosstalk
        3. 8.1.3.3Output Voltage Noise
        4. 8.1.3.4Optimizing Noise and PSRR
          1. 8.1.3.4.1Charge Pump Noise
        5. 8.1.3.5 Load Transient Response
      4. 8.1.4DC Performance
        1. 8.1.4.1Output Voltage Accuracy (VOUTx)
        2. 8.1.4.2 Dropout Voltage (VDO)
          1. 8.1.4.2.1Behavior When Transitioning From Dropout Into Regulation
      5. 8.1.5Reverse Current Protection
      6. 8.1.6Power Dissipation (PD)
        1. 8.1.6.1Estimating Junction Temperature
    2. 8.2Typical Application
      1. 8.2.1Design Requirements
      2. 8.2.2Detailed Design Procedure
      3. 8.2.3Application Curves
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1Layout Guidelines
      1. 10.1.1Board Layout
    2. 10.2Layout Example
  11. 11Device and Documentation Support
    1. 11.1Device Support
      1. 11.1.1Development Support
        1. 11.1.1.1Evaluation Modules
        2. 11.1.1.2Spice Models
      2. 11.1.2Device Nomenclature
    2. 11.2Documentation Support
      1. 11.2.1Related Documentation
    3. 11.3Community Resources
    4. 11.4Trademarks
    5. 11.5Electrostatic Discharge Caution
    6. 11.6Glossary
  12. 12Mechanical, Packaging, and Orderable Information

Features

  • AEC-Q100 Qualified With the Following Results:
    • Temperature Grade 1: –40°C ≤ TA ≤ +125°C
    • HBM ESD Classification Level 2
    • CDM ESD Classification Level C5
  • Two Independent LDO Channels
  • Low Output Noise: 4 µVRMS (10 Hz to 100 kHz)
  • Low Dropout: 230 mV (Maximum) at 1 A
  • Wide Input Voltage Range: 1.4 V to 6.5 V
  • Wide Output Voltage Range: 0.8 V to 5.15 V
  • High Power-Supply Ripple Rejection:
    • 70 dB at 100 Hz
    • 40 dB at 100 kHz
    • 40 dB at 1 MHz
  • 1% Accuracy Over Line, Load, and Temperature
  • Excellent Load Transient Response
  • Adjustable Start-Up Inrush Control
  • Selectable Soft-Start Charging Current
  • Independent Open-Drain Power-Good (PG) Outputs
  • Stable With a 10-µF or Larger Ceramic Output Capacitor
  • Low Thermal Resistance: RθJA = 39.8°C/W
  • 4-mm × 4-mm Wettable Flank WQFN Package

Applications

  • RF and Radar Power in Automotive Applications
  • Automotive ADAS ECUs
  • Telematic Control Units
  • Infotainment and Clusters
  • High-Speed I/F (PLL and VCO)

Description

The TPS7A88-Q1 is a dual, low-noise (4 µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1 A per channel with 250 mV of maximum dropout.

The TPS7A88-Q1 provides the flexibility of two independent LDOs and approximately 50% smaller solution size than two single-channel LDOs. Each output is adjustable with external resistors from 0.8 V to 5.15 V. The TPS7A88-Q1 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 TPS7A88-Q1 is ideal for powering sensitive analog low-voltage devices (such as voltage-controlled oscillators [VCOs], analog-to-digital converters [ADCs], digital-to-analog converters [DACs], high-end processors, and field-programmable gate arrays [FPGAs]).

The TPS7A88-Q1 is designed to power noise-sensitive components such as those found in RF, radar communications, and telematic applications. The low 4-µVRMS output noise and wideband PSRR (40 dB at 1 MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs. The TPS7A88-Q1 features wettable flanks for simple optical inspection.

Device Information(1)

PART NUMBERPACKAGEBODY SIZE (NOM)
TPS7A88-Q1WQFN (20)4.00 mm × 4.00 mm
  1. For all available packages, see the package option addendum at the end of the data sheet.

Typical Application Diagram

TPS7A88-Q1 SBVS303_typappFAD.gif

Spectral Noise Density vs Output Voltage

TPS7A88-Q1 D027_SBVS248.gif