Diodes Incorporated

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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

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

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