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The ZXLD1350 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 7V and 30V and provides an externally adjustable output current of up to 350mA. Depending upon supply voltage and external components, this can provide up to 8 watts of output power. The ZXLD1350 includes the output switch and a high-side output current sensing circuit, which uses an external resistor to set the nominal average output current. Output current can be adjusted above, or below the set value, by applying an external control signal to the 'ADJ' pin. The ADJ pin will accept either a DC voltage or a PWM waveform. Depending upon the control frequency, this will provide either a continuous or a gated output current. The PWM filter components are contained within the chip. The PWM filter provides a soft-start feature by controlling the rise of input/output current. The soft-start time can be increased 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 device is assembled in a TSOT25 pin package.


  • Low voltage halogen replacement LEDs
  • Automotive lighting
  • Low voltage industrial lighting
  • LED back-up lighting
  • Illuminated signs


  • Simple low parts count
  • Internal 30V NDMOS switch
  • 350mA output current
  • Single pin on/off and brightness control using DC voltage or PWM
  • Internal PWM filter
  • Soft-start
  • High efficiency (up to 95%)
  • Wide input voltage range: 7V to 30V
  • 40V transient capability
  • Output shutdown
  • Up to 1MHz switching frequency
  • Inherent open-circuit LED protection
  • Typical 4% output current accuracy

Product Specifications

Product Parameters

Qualified to AECQ10x Yes
Automotive Compliant PPAP ZXLD1350Q
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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ZXLD1350ET5TA Arrow Electronics Central EU 9000 10/19/2019 Buy Now Germany
ZXLD1350ET5TA Digi-Key Electronics 15980 10/19/2019 Buy Now United States
ZXLD1350ET5TA Mouser Electronics Inc. 5729 10/19/2019 Buy Now United States
ZXLD1350ET5TA Future Electronics 3000 10/18/2019 Buy Now Canada
ZXLD1350ET5TA Future Electronics - Asia 24000 10/18/2019 Singapore
ZXLD1350ET5TA Future Electronics - Europe 15000 10/18/2019 England
ZXLD1350ET5TA RS Components 800 10/18/2019 Buy Now England
ZXLD1350ET5TA RS Components Ltd. 760 10/18/2019 Buy Now Japan


Product Change Notices

PCN # Issue Date Subject
PCN 2312 2018-04-11 Qualification of Additional Bill of Materials (BOM), Top Marking, and Fab Source for Select Products