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The ZXLD1356 is a continuous mode inductive step-down converter, designed for driving single or multiple series connected LEDs efficiently from a voltage source higher than the LED voltage. The device operates from an input supply between 6V and 60V and provides an externally adjustable output current of up to 550mA. Depending upon supply voltage and external components, this can provide up to 30 watts of output power. 
The ZXLD1356 has been qualified to AECQ100 Grade 1 enabling operation in ambient temperatures from -40°C to +125°C.
Output current can be adjusted above, or below the set value, by applying an external control signal to the 'ADJ' pin. Enhanced output current dimming can be achieved by applying a PWM signal to the ‘ADJ’ pin. 


  • Typically better than 0.8% output current accuracy 
  • Simple and with low part count 
  • Single pin on/off and brightness control using DC voltage or PWM 
  • PWM resolution up to 1000:1 
  • High efficiency (up to 97%) 
  • Wide input voltage range: 6V to 60V 
  • Inherent open-circuit LED protection 
  • Available in thermally enhanced packages
    • ƒ V-DFN3030-6 θJA 44°C/W 
    • ƒ TSOT25 θJA 82°C/W 
  • Available in “Green” Molding Compound (No Br, Sb) with lead Free Finish/ RoHS Compliant
    • ƒ Totally Lead-Free & Fully RoHS Compliant
    • ƒ Halogen and Antimony Free. “Green” Device
  • ZXLD1356QET5TA Automotive Grade qualified to AEC-Q100 Grade 1 


  • Low Voltage Halogen Replacement LEDs 
  • Automotive Lighting 
  • Low Voltage Industrial Lighting 
  • LED Back-Up Lighting 
  • Illuminated Signs 
  • Emergency Lighting 
  • SELV Lighting 
  • Refrigeration Lights 

Product Specifications

Product Parameters

AEC Qualified No
Compliance (Only Automotive supports PPAP) Standard
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
Topologies (Charge Pump) No
Minimum Input Voltage (V) 6
Maximum Input Voltage (V) 60
Maximum Output Voltage (V) 60
Maximum LED Current (A) 0.55
LED Current Accuracy (%) 3
Switching Frequency Maximum (kHz) 100
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency (%) 97
Operating Temperature Range (°C) -40 to 125
Sense Voltage (mV) 200
AEC-Q100 Grade No

Related Content


Technical Documents

Evaluation Boards and User Guides

Recommended Soldering Techniques


Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 12005 12/5/2022 South America, North America, Asia, Europe, Middle East Buy Now
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Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Arrow Electronics 2960 12/5/2022 United States Buy Now
Arrow Electronics 12000 12/5/2022 United States Buy Now
Digi-Key Electronics 214340 12/5/2022 Europe, Asia, North America Buy Now
Farnell, An Avnet Company 11391 12/5/2022 England Buy Now
Mouser Electronics Inc. 34084 12/5/2022 South America, North America, Asia, Europe, Middle East Buy Now
Future Electronics - Asia 12000 12/4/2022 Singapore Contact Sales
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