SLVS822E March   2009  – September 2015

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 Dissipation Ratings
    7. 6.7 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 Adjustable Operation
      2. 7.3.2 Output Capacitance and Transient Response
      3. 7.3.3 Calculating Junction Temperature
      4. 7.3.4 Protection Features
    4. 7.4 Device Functional Modes
      1. 7.4.1 Low-Voltage Tracking
  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
      3. 8.2.3 Application Curves
  9. Power Supply Recommendations
    1. 9.1 Thermal Considerations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 Thermal Considerations
  11. 11Device and Documentation Support
    1. 11.1 Related Links
    2. 11.2 Community Resources
    3. 11.3 Trademarks
    4. 11.4 Electrostatic Discharge Caution
    5. 11.5 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
  • Wide Input Voltage Range: 3 V to 50 V
  • Low Quiescent Current: 40 μA (Typical)
  • Low Dropout Voltage: 300 mV (Typical)
  • Output Current: 50 mA
  • No Input Protection Diodes Needed
  • Adjustable Output From 1.275 V to 28 V
  • 1-μA Quiescent Current in Shutdown
  • Stable With 1-μF Output Capacitor
  • Stable With Aluminum, Tantalum, or Ceramic Capacitors
  • Reverse Input-Battery Protection
  • Reverse Output Current Flow Protection
  • Thermal Limiting
  • Available in an 8-Pin MSOP-PowerPAD IC Package

2 Applications

  • Low-Current, High-Voltage Regulators
  • Regulators for Battery-Powered Systems
  • Telecom
  • Automotives

3 Description

The TPS798xx-Q1 is the first device in a line of 50-V high-voltage micropower low-dropout (LDO) linear regulators. This device is capable of supplying 50-mA output current with a dropout voltage of only 300 mV. Designed for low quiescent current high voltage (50 V) applications, 40 μA operating and 1 μA in shutdown makes the TPS798xx-Q1 an ideal choice for battery-powered or high-voltage systems. Quiescent current is also well-controlled in dropout.

Other features of the TPS798xx-Q1 include the ability to operate with low equivalent series resistance (ESR) ceramic output capacitors. This device is stable with only 1 μF on the output; most older devices require from 10-μF to 100-μF tantalum capacitors for stability. Small ceramic capacitors can be used without the necessary addition of ESR, as is common with other regulators. Internal protection circuitry includes reverse input-battery protection, reverse output current protection, current limiting, and thermal limiting to protect the device in various fault conditions.

This device is available in a fixed output voltage of 5 V (TPS79850) and with an adjustable output voltage with a 1.275-V reference voltage (TPS79801). The TPS798xx-Q1 regulator is available in a 8-pin MSOP-PowerPAD (DGN) package with an exposed pad for enhanced thermal management capability.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS79801-Q1 MSOP-PowerPAD (8) 3.00 mm × 3.00 mm
TPS79850-Q1
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Schematic

TPS79801-Q1 TPS79850-Q1 ai_adj_op_lvs822.gif