SLVS389M September   2002  – September 2015 TPS786

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 Diagrams
    3. 7.3 Feature Description
      1. 7.3.1 Regulator Protection
    4. 7.4 Device Functional Modes
  8. 8 Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Programming the TPS78601 Adjustable LDO Regulator
    2. 8.2 Typical Application
      1. 8.2.1 Design Requirements
      2. 8.2.2 Detailed Design Procedure
        1. 8.2.2.1 External Capacitor Requirements
      3. 8.2.3 Application Curves
  9. 9 Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Examples
    3. 10.3 Regulator Mounting
    4. 10.4 Power Dissipation
      1. 10.4.1 Estimating Junction Temperature
  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

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订购信息

1 Features

  • 1.5-A Low-Dropout Regulator With Enable
  • Available in Fixed and Adjustable (1.2 V to 5.5 V) Output Versions
  • High PSRR (49 dB at 10 kHz)
  • Ultralow Noise (48 μVRMS, TPS78630)
  • Fast Start-Up Time (50 μs)
  • Stable With a 1-μF Ceramic Capacitor
  • Excellent Load and Line Transient Response
  • Very Low Dropout Voltage (390 mV at Full Load, TPS78630)
  • 3 × 3 SON PowerPAD™, 6-Pin SOT223 and 5-Pin DDPAK Package

2 Applications

  • RF: VCOs, Receivers, ADCs
  • Audio
  • Bluetooth®, Wireless LAN
  • Cellular and Cordless Telephones
  • Handheld Organizers, PDAs

3 Description

The TPS786 family of low-dropout (LDO) low-power linear voltage regulators features high power-supply rejection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in small outline, SOT223-6 and DDPAK-5 packages. Each device in the family is stable, with a small 1-μF ceramic capacitor on the output. The family uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (for example, 390 mV at 1.5 A). Each device achieves fast start-up times (approximately 50 μs with a 0.001-μF bypass capacitor) while consuming very low quiescent current (265 μA, typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 μA. The TPS78630 exhibits approximately 48 μVRMS of output voltage at 3-V output noise with a 0.1-μF bypass capacitor. Applications with analog components that are noise sensitive, such as portable RF electronics, benefit from the high PSRR, low noise features, and the fast response time.

Device Information(1)

PART NUMBER PACKAGE BODY SIZE (NOM)
TPS786 TO-263 (5) 10.16 mm × 8.42 mm
SOT-223 (6) 6.50 mm × 3.50 mm
SON (8) 3.00 mm × 3.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Ripple Rejection vs Frequency

TPS786 tc_rr_f_1-lvs389.gif

Output Spectral Noise Density vs
Frequency

TPS786 tc_osnd_f_1-lvs389.gif