SNVSB87 November   2018 LM3880-Q1

PRODUCTION DATA.  

  1. Features
  2. Applications
  3. Description
    1.     Device Images
      1.      Simple Power Supply Sequencing
  4. Revision History
  5. Pin Configuration and Functions
    1.     Pin 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
      1. 6.5.1 Timing Requirements
    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 Enable Pin Operation
      2. 7.3.2 Incomplete Sequence Operation
    4. 7.4 Device Functional Modes
      1. 7.4.1 Power Up With EN Pin
      2. 7.4.2 Power Down With EN Pin
  8. Application and Implementation
    1. 8.1 Application Information
      1. 8.1.1 Open Drain Flags Pullup
      2. 8.1.2 Enable the Device
    2. 8.2 Typical Application
      1. 8.2.1 Simple Sequencing of Three Power Supplies
        1. 8.2.1.1 Design Requirements
        2. 8.2.1.2 Detailed Design Procedure
        3. 8.2.1.3 Application Curves
      2. 8.2.2 Sequencing Using Independent Flag Supply
    3. 8.3 Do's and Don'ts
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
  11. 11Device and Documentation Support
    1. 11.1 Device Support
      1. 11.1.1 Third-Party Products Disclaimer
      2. 11.1.2 Device Nomenclature
    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

Electrical Characteristics

Limits apply to all timing options and VCC = 3.3 V, unless otherwise specified. Minimum and Maximum limits apply over the full Operating Temperature Range (TJ = -40°C to +125°C) and are specified through test, design or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25°C and are provided for reference purposes only.
PARAMETER TEST CONDITIONS MIN(1) TYP(2) MAX(1) UNIT
IQ Operating Quiescent current 25 80 µA
OPEN-DRAIN FLAGS
IFLAG FLAGx Leakage Current VFLAGx = 3.3 V 1 20 nA
VOL FLAGx Output Voltage Low IFLAGx = 1.2 mA 0.4 V
POWER-UP SEQUENCE
td1 Timer delay 1 accuracy All Other Timing Options –15% 15%
2 ms Timing Option –20% 20%
td2 Timer delay 2 accuracy All Other Timing Options –15% 15%
2 ms Timing Option –20% 20%
td3 Timer delay 3 accuracy All Other Timing Options –15% 15%
2 ms Timing Option –20% 20%
POWER-DOWN SEQUENCE
td4 Timer delay 4 accuracy All Other Timing Options –15% 15%
2 ms Timing Option –20% 20%
td5 Timer delay 5 accuracy All Other Timing Options –15% 15%
2 ms Timing Option –20% 20%
td6 Timer delay 6 accuracy All Other Timing Options –15% 15%
2 ms Timing Option –20% 20%
TIMING DELAY ERROR
(td(x) – 400 µs) / td(x+1) Ratio of timing delays For x = 1 or 4 95% 105%
For x = 1 or 4, 2 ms option 90% 110%
td(x) / td(x+1) Ratio of timing delays For x = 2 or 5 95% 105%
For x = 2 or 5, 2 ms option 90% 110%
ENABLE PIN
VEN EN pin threshold 1.0 1.25 1.4 V
IEN EN pin pullup current VEN = 0 V 7 µA
Limits are 100% production tested at 25°. Limits over the operating temperature range are ensured through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate TI's Average Outgoing Quality Level (AOQL).
Typical numbers are at 25°C and represent the most likely parametric norm.

Timing Requirements

LM3880-Q1 20192613.gif
All standard options use Sequence 1 for output flags rise and fall order. Refer to section 11.1.2 for details of different sequences possible.
Figure 1. Power-Up Sequence
LM3880-Q1 20192614.gif
All standard options use Sequence 1 for output flags rise and fall order. Refer to section 11.1.2 for details of different sequences possible.
Figure 2. Power-Down Sequence