SNVS179F February   2003  – September 2015 LP3995

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 Timing Requirements
    7. 6.7 Typical Characteristics
  7. 7 Parameter Measurement Information
    1. 7.1 Input Test Signals
  8. 8 Detailed Description
    1. 8.1 Overview
    2. 8.2 Functional Block Diagram
    3. 8.3 Feature Description
      1. 8.3.1 Enable (EN)
      2. 8.3.2 Fast Turnoff
      3. 8.3.3 Low Output Noise
      4. 8.3.4 Output Capacitor
      5. 8.3.5 Thermal Overload Protection (TSD)
    4. 8.4 Device Functional Modes
      1. 8.4.1 Enable Operation
  9. 9 Application and Implementation
    1. 9.1 Application Information
    2. 9.2 Typical Application
      1. 9.2.1 Design Requirements
      2. 9.2.2 Detailed Design Procedure
        1. 9.2.2.1 External Capacitors
        2. 9.2.2.2 Input Capacitor
        3. 9.2.2.3 Output Capacitor
        4. 9.2.2.4 No-Load Stability
        5. 9.2.2.5 Capacitor Characteristics
        6. 9.2.2.6 Noise Bypass Capacitor
        7. 9.2.2.7 Fast Turnoff and Turnon
        8. 9.2.2.8 Power Dissipation
        9. 9.2.2.9 Estimating Junction Temperature
      3. 9.2.3 Application Curves
  10. 10Power Supply Recommendations
  11. 11Layout
    1. 11.1 Layout Guidelines
    2. 11.2 Layout Examples
    3. 11.3 DSBGA Mounting
    4. 11.4 DSBGA Light Sensitivity
  12. 12Device and Documentation Support
    1. 12.1 Documentation Support
      1. 12.1.1 Related Documentation
    2. 12.2 Community Resources
    3. 12.3 Trademarks
    4. 12.4 Electrostatic Discharge Caution
    5. 12.5 Glossary
  13. 13Mechanical, Packaging, and Orderable Information

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订购信息

5 Pin Configuration and Functions

YZR Package
5-Pin DSBGA
Top View
LP3995 20034903.gif
NGD Package
6-Pin WSON
Top View
LP3995 20034904.gif

Pin Functions

PIN TYPE DESCRIPTION
NAME WSON DSBGA
BYPASS 4 A3 — Bypass capacitor connection.
Connect a 0.01-µF capacitor for noise reduction.
EN 3 A1 Input Enable input; Disables the regulator when ≤ 0.4 V.
Enables the regulator when ≥ 0.9 V.
GND 2 B2 Ground Common ground
GND Thermal Pad — Ground The exposed thermal pad on the bottom of the WSON package should be connected to a copper thermal pad on the PCB under the package. The use of thermal vias to remove heat from the package into the PCB is recommended. Connect the exposed thermal pad to ground potential or leave floating. Do not connect the thermal pad to any potential other than the same ground potential seen at device pin 2. For additional information on using TI's non pull-back WSON package, see TI Application Note AN- 1187 Leadless Leadframe Package (LLP) (SNOA401).
IN 1 C3 Input Voltage supply input
N/C 5 — — No internal connection. This pin can be connected to GND, or left open.
OUT 6 C1 Output Voltage output. Connect this output to the load circuit.