SLRS059B April   2012  – June  2015 ULN2003LV


  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 Switching Characteristics
    7. 6.7 Dissipation Ratings
    8. 6.8 Typical Characteristics
  7. Detailed Description
    1. 7.1 Overview
    2. 7.2 Functional Block Diagram
    3. 7.3 Feature Description
      1. 7.3.1 TTL and Other Logic Inputs
      2. 7.3.2 Input RC Snubber
      3. 7.3.3 High-Impedance Input Drivers
    4. 7.4 Device Functional Modes
  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 Curve
    3. 8.3 System Examples
      1. 8.3.1 Max Supply Selector
      2. 8.3.2 Constant Current Generation
      3. 8.3.3 Unipolar Stepper Motor Driver
      4. 8.3.4 NOR Logic Driver
      5. 8.3.5 1.8-V Relay Driver
  9. Power Supply Recommendations
  10. 10Layout
    1. 10.1 Layout Guidelines
    2. 10.2 Layout Example
    3. 10.3 On-Chip Power Dissipation
    4. 10.4 Thermal Considerations
      1. 10.4.1 Improving Package Thermal Performance
  11. 11Device and Documentation Support
    1. 11.1 Community Resources
    2. 11.2 Trademarks
    3. 11.3 Electrostatic Discharge Caution
    4. 11.4 Glossary
  12. 12Mechanical, Packaging, and Orderable Information



1 Features

  • 7-Channel High Current Sink Drivers
  • Supports up to 8V Ouput Pullup Voltage
  • Supports a Wide Range of 3V-to-5V Relay and Inductive Coils
  • Low Output VOL of 0.4V (Typical) With
    • 100mA (Typical) Current Sink per Channel at 3.3V Logic Input(1)
    • 140mA (Typical) Current Sink per Channel at 5.0V Logic Input(1)
  • Compatible to 3.3V and 5.0V Microcontrollers and Logic Interface
  • Internal Free-Wheeling Diodes for Inductive Kick-back Protection
  • Input Pulldown Resistors Allows3-stating the Input Driver
  • Input RC-Snubber to Eliminate Spurious Operation in Noisy Environment
  • Low Input and Output Leakage Currents
  • Easy to use Parallel Interface
  • ESD Protection Exceeds JESD 22
    • 2kV HBM, 500V CDM
  • Available in 16-Pin SOIC and TSSOP Packages (1)
(1) Total current sink may be limited by the internal junction temperature, absolute maximum current levels etc - refer to the Electrical Specifications section for details.

2 Applications

  • Relay and Inductive Load Driver in Various Telecom, Consumer, and Industrial Applications
  • Lamp and LED Displays
  • Logic Level Shifter

3 Description

The ULN2003LV is a low-voltage and low power upgrade of TI’s popular ULN2003 family of 7-channel Darlington transistor array. The ULN2003LV sink driver features 7 low output impedance drivers to support low voltage relay and inductive coil applications. The low impedance drivers minimize on-chip power dissipation; up to 5 times lower for typical 3V relays. The ULN2003LV driver is pin-to-pin compatible with ULN2003 family of devices in similar packages.

The ULN2003LV supports 3.3V to 5V CMOS logic input interface thus making it compatible to a wide range of micro-controllers and other logic interfaces. The ULN2003LV features an improved input interface that minimizes the input DC current drawn from the external drivers. The ULN2003LV features an input RC snubber that greatly improves its performance in noisy operating conditions. The ULN2003LV channel inputs feature an internal input pull-down resistor thus allowing input logic to be tri-stated. The ULN2003LV may also support other logic input levels, for example, TTL and 1.8V, refer to the Application Information section for details.

The ULN2003LV provides flexibility of increasing current sink capability through combining several adjacent channels in parallel. Under typical conditions the ULN2003LV can support up to 1.0A of load current when all 7-channels are connected in parallel. The ULN2003LV can also be used in a variety of applications requiring a sink drivers like driving LEDs and Logic Level Shifting.

Device Information(1)

ULN2003LVDR SOIC (16) 3.90 mm x 9.90 mm
ULN2003LVPWR TSSOP (16) 4.40 mm x 5.00 mm
  1. For all available packages, see the orderable addendum at the end of the data sheet.

Simplified Function Diagram

ULN2003LV fun_dia_FP_lrs059.gif