AEC-Q100 Qualified 40V, 8A Synchronous Step-Down COT Regulator


The XR76208-Q is a synchronous step-down regulator combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies well suited for automotive applications. Qualified per AEC-Q100, the XR76208-Q has a load current rating of 8A. A wide 5.5V to 40V input voltage range allows for single supply operation from industry standard 24V ±10%, 18V-36V, and rectified 18VAC and 24VAC rails.

With a proprietary emulated current mode Constant On-Time (COT) control scheme, the XR76208-Q provides extremely fast line and load transient response using ceramic output capacitors. It requires no loop compensation, simplifying circuit implementation and reducing overall component count. The control loop also provides 0.07% load and 0.15% line regulation and maintains constant operating frequency. A selectable power saving mode allows the user to operate in Discontinuous Conduction Mode (DCM) at light current loads thereby significantly increasing the converter efficiency.

A host of protection features, including overcurrent, over temperature, short-circuit and UVLO, helps achieve safe operation under abnormal operating conditions.

The XR76208-Q is available in a RoHS-compliant, green/halogen-free space-saving QFN 5 x 5mm package.

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  • Automotive AEC-Q100 Qualified
    • Temperature Grade1: -40°C to 125°C
    • HBM ESD Class Level 2
    • CDM ESD Class Level C4B
  • Controller, drivers, bootstrap diode and MOSFETs integrated in one package
  • 8A step-down regulator
    • Wide 5.5V to 40V input voltage range
    • ≥0.6V adjustable output voltage
  • Proprietary constant on-time control
    • No loop compensation required
    • Stable ceramic output capacitor operation
    • Programmable 200ns to 2µs on-time
    • Constant 100kHz to 800kHz frequency
  • Selectable CCM or CCM/DCM
    • CCM/DCM for high efficiency at light load
    • CCM for constant frequency at light load
  • Programmable hiccup current limit with thermal compensation
  • Precision enable and power good flag
  • Programmable soft-start
  • 30-pin 5 x 5mm QFN package with wettable flanks
  • Pin compatible 5A regulator, XR76205-Q
  • Pin compatible 3A regulator, XR76203-Q


  • Automotive systems
  • Distributed power architecture
  • Point-of-Load (POL) converters
  • Power supply modules
  • FPGA, DSP and processor supplies
  • Industrial and military applications
  • Base stations, switches/routers and servers

Design Tools


Pkg Code Details Quantities Dimensions PDF
QFN30 5x5 OPT2
  • JEDEC Reference: MO-220
  • MSL Pb-Free: L1 @ 260
  • MSL SnPb Eutectic:
  • ThetaJA: 26
  • Bulk Pack Style: Tray
  • Quantity per Bulk Pack: 490
  • Quantity per Reel: 3000
  • Quantity per Tube: N/A
  • Quantity per Tray: 490
  • Reel Size (Dia. x Width x Pitch): 330x12
  • Tape & Reel Unit Orientation: Quadrant 1
  • Dimensions: mm
  • Length: 5
  • Width: 5
  • Thickness: 0.9
  • Lead Pitch: 0.5

Parts & Purchasing

Part Number Pkg Code RoHS Min Temp Max Temp Status Buy Now Order Samples
XR76208EL-Q QFN30 5x5 OPT2 -40 125 Active
XR76208ELTR-Q QFN30 5x5 OPT2 -40 125 Active
XR76208EVB-Q Board Active
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Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs.
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