XRP6141 35A Synchronous Step Down COT Controller October 2019 Rev. 2.0.3 GENERAL DESCRIPTION APPLICATIONS The XRP6141 is a synchronous step-down Networking and communications controller for point-of load supplies up to 35A. Fast transient Point-of-Loads A wide 4.5V to 22V input voltage range allows for single supply operation from industry Industrial and medical equipment standard 5V, 12V, and 19.6V rails. Embedded high power FPGA With a proprietary emulated current mode Constant On-Time (COT) control scheme, the FEATURES XRP6141 provides extremely fast line and load transient response using ceramic output 35A capable step down controller capacitors. It requires no loop compensation, Wide input voltage range hence simplifying circuit implementation and o 5V to 22V single supply reducing overall component count. The control o 4.5V to 5.5V low VIN loop also provides exceptional line regulation and maintains constant operating frequency. A Integrated high current 2A/3A drivers selectable power saving mode allows the user 0.6V to 18V adjustable output voltage to operate in discontinuous mode (DCM) at light Proprietary Constant On-Time control current loads, thereby significantly increasing the converter efficiency. No loop compensation required Ceramic output capacitor stable operation A host of protection features, including over- current, over-temperature, short-circuit, and Programmable 200ns - 2s UVLO, help achieve safe operation under Constant 200kHz - 800kHz frequency abnormal operating conditions. Selectable CCM or CCM / DCM operation The XRP6141 is available in a RoHS compliant, Programmable hiccup current limit green / halogen free space-saving 16-pin with thermal compensation 3x3mm QFN package. Precision enable and Power-Good flag Programmable soft-start Integrated bootstrap diode 16-pin QFN package TYPICAL APPLICATION DIAGRAM Fig. 1: XRP6141 Application Diagram 1/15 XRP6141 35A Synchronous Step Down COT Controller ABSOLUTE MAXIMUM RATINGS OPERATING RATINGS These are stress ratings only and functional operation of VIN ........................................................... -0.3V to 22V the device at these ratings or any other above those V .......................................................... -0.3V to 5.5V CC indicated in the operation sections of the specifications 1 SW, ILIM ................................................... -1V to 26V below is not implied. Exposure to absolute maximum rating PGOOD, VCC, TON, SS, EN, GL, FB ............ -0.3V to 5.5V conditions for extended periods of time may affect 3 Switching frequency ............................ 200kHz - 800kHz reliability. Junction temperature range ..................... -40C to 125C V ............................................................ -0.3V to 28V IN VCC .......................................................... -0.3V to 6.0V Note 1: SW pins minimum DC range is -1V, transient is 2 BST ......................................................... -0.3V to 34V -5V for less than 50ns BST-SW ...................................................... -0.3V to 6V Note 2: No external voltage applied 1,2 SW, ILIM .................................................. -5V to 28V Note 3: Recommended GH................................................... -0.3V to BST+0.3V GH-SW ........................................................ -0.3V to 6V ALL other pins ................................... -0.3V to VCC+0.3V Storage temperature .............................. -65C to 150C Junction temperature ........................................... 150C Power dissipation ................................ Internally Limited Lead temperature (Soldering, 10 sec) .................... 300C ESD rating (HBM - Human Body Model) ..................... 2kV ELECTRICAL SPECIFICATIONS Specifications are for the operating junction temperature of T = 25C only limits applying over the full operating junction J temperature range are denoted by a . Minimum and maximum limits are guaranteed through test, design, or statistical correlation. Typical values represent the most likely parametric norm at TJ = 25C, and are provided for reference purposes only. Unless otherwise indicated, V = 12V, BST = VCC, SW = GND = PGND = 0V, CGH = CGL = 3.3nF. IN Parameter Min. Typ. Max. Units Conditions Power Supply Characteristics 5 12 22 VCC regulating V , input voltage range V IN 5.0 5.5 VCC tied to V 4.5 IN I , V supply current 0.7 2 mA Not switching, V = 12V, VFB = 0.7V VIN IN IN IVCC, VCC quiescent current 0.7 2 mA Not switching, VCC = VIN = 5V, VFB = 0.7V IVIN, VIN supply current 11 mA f = 300kHz, RON = 108.8k, VFB = 0.58V I , shutdown current 0.1 A Enable = 0V, V = 12V OFF IN Enable and Under-Voltage Lock-Out UVLO VIH EN, EN pin rising threshold 1.8 1.9 2.0 V VEN HYS, EN pin hysteresis 50 mV VIH EN, EN pin rising threshold for 2.9 3.0 3.1 V DCM/CCM operation VEN HYS, EN pin hysteresis 100 mV VCC UVLO start threshold, rising 4.25 4.50 V 4.00 edge VCC UVLO hysteresis 200 mV Reference Voltage 0.597 0.600 0.603 V VIN = 5V-22V VCC regulating VREF, reference voltage 0.596 0.604 V VIN = 4.5V-5.5V tie VCC to VIN V = 5V-22V VCC regulating, IN 0.594 0.600 0.606 V VIN = 4.5V-5.5V tie VCC to VIN DC line regulation 0.1 % CCM operation, closed loop, applies to any C OUT 0.25 % DC load regulation CCM operation, closed loop, applies to any COUT 2/15 Rev. 2.0.3