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The ZXLD1366Q 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 1A.

The ZXLD1366Q uses a high-side output current sensing circuit which uses an external resistor to set the nominal average output current. The 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 resolution can be achieved by applying a PWM signal to the ‘ADJ’ pin.

Soft-start can be forced using an external capacitor from the ADJ pin to ground. Applying a voltage of 0.2V or lower to the ADJ pin turns the output off and switches the device into a low current standby state.

The ZXLD1366Q has been qualified to AEC-Q100 Grade 1 and is Automotive Grade supporting PPAPs.


  • Automotive Lighting
  • Rear Cluster
  • LED Internal Lamps


  • Typically better than 0.8% output current accuracy
  • Available in thermally enhanced DFN and SO-8 packages
  • 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
  • “Green” Mold compound (No Br, Sb) and lead Free Finish/RoHS Compliant

Product Specifications

Product Parameters

Qualified to AEC-Q10x Yes
Compliance (Only Automotive supports PPAP) Automotive
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
MinimumInput Voltage (V) 6 V
MaximumInput Voltage (V) 60 V
Maximum Output Voltage (V) 60 V
Maximum LED Current (A) 1 A
LED Current Accuracy (%) 2.5 %
Switching Frequency Maximum (kHz) 500 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency (%) 95 %
OperatingTemperatureRange  (°C) -40 to 125 °C
Sense Voltage (mV) 200 mV
AEC-Q100 Grade 1

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Orderable Part Number Buy from Distributor / Contact Sales Request Samples


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 2370 9/27/2021 South America, North America, Asia, Europe, Middle East Buy Now
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