ULN2003LV Low Power 3.3V & 5V Relay Driver | TI.com


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, 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.


  • 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
  • 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

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Parametrics Compare all products in Low-side switches

Drivers per package
Switching Voltage (Max) (V)
Output voltage (Max) (V)
Peak output current (mA)
Delay time (Typ) (ns)
Input compatibility
Vol @ lowest spec current (Typ) (mV)
Iout/ch (Max) (mA)
Iout_off (Typ) (uA)
7     7    
8     32    
8     30    
1000     500    
80     250    
260     210    
140     600    
0.17     0.01    
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