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The ZXLD1350Q is a hysteretic mode inductive step-down converter with integrated switch and high side current sense.
It operates from an input supply from 7V to 30V driving single or multiple series connected LEDs efficiently external adjustable output current up to 350mA.
The output current can be adjusted by applying a DC voltage or a PWM waveform. 100:1 adjustment of output current is possible using PWM control. 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 ZXLD1350Q has been qualified to AECQ100 grade 2 and is Automotive Grade supporting PPAPs.


  • Simple low parts count
  • Internal 30V NDMOS switch
  • Internal PWM filter
  • High efficiency (up to 95% (Note 1)
  • Wide input voltage range: 7V to 30V
  • 40V transient capability
  • Up to 1MHz switching frequency
  • Typical 4% output current accuracy
  • Green Molding (No Br, Sb) in TSOT25
  • Totally Lead-Free & Fully RoHS Compliant 
  • Halogen and Antimony Free. “Green” Device
  • Automotive Grade
  • Qualified to AEC-Q100 Standards for High Reliability
  • Supports PPAP Documents 

Product Specifications

Product Parameters

Qualified to AECQ10x Yes
Automotive Compliant PPAP Automotive
Topologies (Buck) Yes
Topologies (Buck-Boost) No
Topologies (Boost) No
Minimum Input Voltage 7 V
Maximum Input Voltage 30 V
Maximum Output Voltage 30 V
Maximum LED Current 0.38 A
LED Current Accuracy 5 %
Switching Frequency Maximum 1000 kHz
Dimming (PWM) Yes
Dimming (Analog) Yes
Efficiency 95 %
Operating Temperature Range -40 to 105 °C
Sense Voltage 100 mV
AEC-Q100 Grade 2

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