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XR76203 Dataheets PDF



Part Number XR76203
Manufacturers MaxLinear
Logo MaxLinear
Description 3A Synchronous Step Down COT Regulator
Datasheet XR76203 DatasheetXR76203 Datasheet (PDF)

XR76203 / XR76205 / XR76208 May 17, 2023 40V 3A/5A/8A Synchronous Step Down COT Regulators General Description The XR76203, XR76205 and XR76208 are synchronous step-down regulators combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies. The XR76203, XR76205, and XR76208 have load current ratings of 3A, 5A and 8A respectively. A wide 4.5V to 40V input voltage range allows for single supply operation from industry standard 24V ±10%, 18V - 3.

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XR76203 / XR76205 / XR76208 May 17, 2023 40V 3A/5A/8A Synchronous Step Down COT Regulators General Description The XR76203, XR76205 and XR76208 are synchronous step-down regulators combining the controller, drivers, bootstrap diode and MOSFETs in a single package for point-of-load supplies. The XR76203, XR76205, and XR76208 have load current ratings of 3A, 5A and 8A respectively. A wide 4.5V 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 XR76203, XR76205, and XR76208 provide extremely fast line and load transient response using ceramic output capacitors. They require 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 over-current, over-temperature, short-circuit and UVLO, helps achieve safe operation under abnormal operating conditions. The XR76203, XR76205, and XR76208 are all available in a RoHScompliant, green / halogen-free, space-saving QFN 5x5mm package. FEATURES  Controller, drivers, bootstrap diode and MOSFETs integrated in one package  3A, 5A and 8A step down regulators  Wide 4.5V 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 5x5mm QFN package APPLICATIONS  Distributed power architecture  Point-of-Load converters  Power supply modules  FPGA, DSP, and processor supplies  Base stations, switches / routers, and servers Ordering Information – back page Typical Application VIN Enable/Mode Power Good CIN R VIN PVIN EN/MODE BST PGOOD SW XR76208 VCC XR76205 SS XR76203 ILIM CVCC CSS TON RON AGND FB PGND CBST RLIM L1 CFF R1 R2 VOUT COUT Efficiency % XR76208 Efficiency, VIN = 24V 100 98 96 94 92 90 88 86 84 82 80 78 76 74 72 70 0.1 200kHz, 8.2uH 3.3uH 2.2uH 1.5uH 12V DCM 5.0V DCM 3.3V DCM 1.8V DCM 1.0 IOUT (A) 12V CCM 5.0V CCM 3.3V CCM 1.8V CCM 10.0 1 XR76203 / XR76205 / XR76208 Absolute Maximum Ratings Stresses beyond the limits listed below may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime. PVIN, VIN....


B58031I5105M002 XR76203 XR76205


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