Low Power 3.3V & 5V Relay Driver - ULN2003LV


Low Power 3.3V & 5V Relay Driver

Recommended alternative parts

  • TPL7407L  -  Better power efficiency, lower leakage and operating temperature range up to 125C


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, e.g. TTL and 1.8V, refer to the Application Information section for details.

Each output of the ULN2003LV features an internal free-wheeling diode connected in a common-cathode configuration at the COM pin.

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 other applications requiring a sink drivers. The ULN2003LV is available in 16-pin SOIC and 16-pin TSSOP packages.


  • 7-Channel High Current Sink Drivers
  • Supports up to 8V Ouput Pull-up 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 Micro-controllers and Logic Interface
  • Internal Free-wheeling Diodes for Inductive Kick-back Protection
  • Input Pull-down 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 PackagesTotal current sink may be
    limited by the internal junction temperature, absolute maximum current
    levels etc - refer to the Electrical Specifications section for details.

View more

Parametrics Compare all products in Peripheral Driver and Actuator

Drivers Per Package
Switching Voltage (Max) (V)
Peak Output Current (mA)
Delay Time (Typ) (ns)
Output Voltage (Max) (V)
Input Compatibility
Vol@Lowest Spec Current (Typ) (mV)
Iout/ch (Max) (mA)
Iout_off (Typ) (uA)
Approx. Price (US$)
ULN2003LV ULN2003A ULN2003V12 ULN2004A ULN2803A
7     7     7     7     8    
8     50     16     50     50    
1000     500     1000     500     500    
80     250     80     250     130    
8     50     16     50     50    
CMOS     CMOS      
260     900     600     900     900    
140     500     140     500     500    
0.17     50     0.5     50     50    
Catalog     Catalog     Catalog     Catalog     Catalog    
0.21 | 100u     0.21 | 1ku     0.16 | 1ku     0.22 | 1ku     0.50 | 1ku    

Featured tools and software

Companion parts

Part # Name Product Family Comments
ULN2003A   High-Voltage, High-Current Darlington Transistor Arrays   OTHER INTERFACE - PERIPHERAL DRIVER AND ACTUATOR    
Click Here