XR76115 15A Synchronous Step Down COT Regulator General Description FEATURES The XR76115 is a synchronous step-down regulator combining 15A capable step down regulator the controller, drivers, bootstrap diode and MOSFETs in a single 4.5V to 5.5V low V operation IN package for point-of-load supplies. The XR76115 has a load 5V to 22V wide single input voltage current rating of 15A. A wide 5V to 22V input voltage range allows 0.6V adjustable output voltage for single supply operation from industry standard 5V, 12V and Controller, drivers, bootstrap diode and 19.6V rails. MOSFETs integrated in one package With a proprietary emulated current mode Constant On-Time Proprietary Constant On-Time control (COT) control scheme, the XR76115 provides extremely fast line No loop compensation required and load transient response using ceramic output capacitors. It Ceramic output capacitor stable requires no loop compensation, simplifying circuit implementation operation and reducing overall component count. The control loop also Programmable 200ns - 2s on-time provides 0.25% load and 0.12% line regulation and maintains Quasi constant 200kHz - 800kHz constant operating frequency. A selectable power saving mode frequency allows the user to operate in discontinuous mode (DCM) at light Selectable CCM or CCM / DCM current loads, thereby significantly increasing the converter operation efficiency. Precision enable and Power-Good flag A host of protection features, including over-current, over- Programmable soft-start temperature, short-circuit and UVLO, help achieve safe operation under abnormal operating conditions. 6x6mm 37-pin QFN package The XR76115 is available in a RoHS-compliant, green / halogen- APPLICATIONS free, space-saving QFN 6x6mm package. Distributed power architecture Point-of-Load converters Power supply modules FPGA, DSP, and processor supplies Base stations, switches / routers, and server Typical Application 1.220 1.215 1.210 1.205 1.200 1.195 1.190 1.185 1.180 5 10 15 20 V (V) IN Figure 2: XR76115 Line Regulation Figure 1: XR76115 Application Diagram www.maxlinear.com Rev 1D V (V) OUT XR76115 Absolute Maximum Ratings Operating Ratings These are stress ratings only and functional operation of the device PVIN ................................................................................. 3V to 22V at these ratings or any other above those indicated in the operation VIN ................................................................................ 4.5V to 22V sections of the specifications below is not implied. Stresses beyond VCC .............................................................................. 4.5V to 5.5V those listed under Absolute Maximum Ratings may cause (2) SW, I ....................................................................... -1V to 22V LIM permanent damage to the device. Exposure to any Absolute PGOOD, VCC, TON, SS, EN .......................................... -0.3V to 5.5V Maximum Rating condition for extended periods may affect device (3) reliability and lifetime. Switching Frequency ......................................... 200kHz - 800kHz Junction Temperature Range (TJ) ............................ -40C to 125C PV , V ...................................................................... -0.3V to 25V IN IN XR76115 Package Power Dissipation max at 25C ................ 5.2W ............................................................................. -0.3V to 6.0V VCC (1) XR76115 JEDEC51 Package Thermal Resistance JA ........ 19C/W BST .......................................................................... -0.3V to 31V BST-SW ........................................................................ -0.3V to 6V Note 1: No external voltage applied (1,2) SW, I ..................................................................... -1V to 25V LIM Note 2: SW pins DC range is -1V, transient is -5V for less than 50ns +0.3V All other pins ....................................................... -0.3V to VCC Note 3: Recommended 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 (1) Ordering Information (2) Part Number Operating Temperature Range Package Packing Method Lead-Free 6x6mm QFN Bulk Yes XR76115EL-F -40CTJ+125C XR76115ELTR-F 6x6mm QFN Tape & Reel Yes -40CTJ+125C XR76115EVB XR76115 Evaluation Board NOTES: 1. Refer to www.maxlinear.com/XR76115 for most up-to-date Ordering Information. 2. Visit www.maxlinear.com for additional information on Environmental Rating. Electrical Characteristics Specifications are for the operating junction temperature of T = 25C only limits applying over the full operating junction temperature range are J denoted by a . Typical values represent the most likely parametric norm at TJ = 25C, and are provided for reference purposes only. Unless otherwise indicated, VIN=12V. Parameter Min. Typ. Max. Units Conditions Power Supply Characteristics 5 12 22 VCC regulating V VIN, input voltage range 5.0 5.5 V tied to V 4.5 CC IN I , V supply current 0.7 1.3 mA Not switching, V = 12V, V = 0.7V VIN IN IN FB IVCC, VCC quiescent current 0.7 1.3 mA Not switching, VCC = VIN = 5V, VFB = 0.7V IVIN, VIN supply current 11 mA f = 300kHz, RON = 107k, VFB = 0.58V I , shutdown current 0.5 A Enable = 0V, V = 12V, V = PV OFF IN IN IN Enable and Under-Voltage Lock-Out UVLO V , EN pin rising threshold 1.9 2.0 V IH EN 1.8 VEN HYS, EN pin hysteresis 50 mV VIH EN, EN pin rising threshold for 3.0 3.1 V 2.8 DCM / CCM operation VEN HYS, EN pin hysteresis 100 mV V UVLO start threshold, rising edge 4.25 4.50 V CC 4.00 V UVLO hysteresis 200 mV CC 2/15 www.maxlinear.com Rev. 1D