XR79115 22V, 15A Synchronous Step Down COT Power Module FEATURES General Description Controller, drivers, bootstrap diode and capacitor, MOSFETs, inductor, CIN and COUT The XR79115 is a 15A synchronous step-down Power Module for point-of integrated in one package load supplies. A wide 5V to 22V input voltage range allows for single 15A step down module supply operation from industry standard 5V, 12V, and 19.6V rails. Wide 5V to 22V input voltage range With a proprietary emulated current mode Constant On-Time (COT) 0.6V adjustable output voltage control scheme, the XR79115 provides extremely fast line and load Proprietary Constant On-Time control transient response using ceramic output capacitors. It requires no loop No loop compensation required compensation, hence simplifying circuit implementation and reducing Stable ceramic output capacitor operation overall component count. The control loop also provides 0.35% load and Programmable 200ns to 2s on-time 0.1% line regulation and maintains constant operating frequency. A Constant 400kHz to 600kHz frequency selectable power saving mode allows the user to operate in discontinuous mode (DCM) at light current loads, thereby significantly increasing the Selectable CCM or CCM / DCM converter efficiency. With a 96% peak efficiency and 90% for loads as low CCM / DCM for high efficiency at light-load as 100mA, the XR79115 is suitable for applications where low power CCM for constant frequency at light-load losses are important. Programmable hiccup current limit with thermal compensation A host of protection features, including over-current, over-temperature, Precision enable and Power Good flag short-circuit and UVLO, help achieve safe operation under abnormal Programmable soft-start operating conditions. 68-pin 12 x 12 x 4mm QFN package The XR79115 is available in a RoHS compliant, green / halogen free space-saving 68-pin 12 x 12 x 4mm QFN package. With integrated APPLICATIONS controller, drivers, bootstrap diode and capacitor, MOSFETs, inductor, Networking and communications CIN and COUT, this solution allows the smallest possible 15A POL Fast transient Point-of-Loads design. Industrial and medical equipment Embedded high power FPGA Ordering Information back page Typical Application Line Regulation 1.220 VIN VIN PVIN 1.215 Enable/Mode EN/MODE 1.210 V OUT Power Good PGOOD VOUT 1.205 C IN R3 VCC XR79 11 5 SW 1.200 R LIM R1 SS ILIM 1.195 C OUT 1.190 TON FB C C R VCC SS ON R2 1.185 AGND PGND 1.180 4 6 8 10 1214 16182022 V (V) IN 1 / 18 maxlinear.com/XR79115 Rev 1D V (V) OUTXR79115 Absolute Maximum Ratings Operating Conditions PV ...............................................................................3V to 22V Stresses beyond the limits listed below may cause IN permanent damage to the device. Exposure to any Abso- V ..............................................................................4.5V to 22V IN lute Maximum Rating condition for extended periods may affect device reliability and lifetime. V ............................................................................4.5V to 5.5V CC PV , V ...................................................................-0.3V to 25V 1 IN IN SW, ILIM.....................................................................-1V to 22V V ...........................................................................-0.3V to 6.0V CC PGOOD, V , T , SS, EN, FB...............................-0.3V to 5.5V CC ON 1 3 BST..........................................................................-0.3V to 31V Switching frequency........................................400kHz to 600kHz BST-SW.......................................................................-0.3V to 6V Junction temperature range.................................-40C to +125C 1, 2 SW, ILIM...................................................................-1V to 25V JEDEC51 Package thermal resistance, ...................15.4C/W JA ALL other pins.................................................-0.3V to VCC+0.3V Package power dissipation at 25C.......................................6.5W Storage temperature...........................................-65C to +150C Junction temperature..........................................................150C Note 1: No external voltage applied. Power dissipation...............................................Internally Limited Note 2: The SW pins minimum DC range is -1V, transient is -5V for less than 50ns. Lead temperature (Soldering, 10 sec)......................260C MSL3 Note 3: Recommended frequency for optimum performance. ESD Rating (HBM - Human Body Model)...............................2kV Electrical Characteristics Unless otherwise noted: T = 25C, V = 12V, BST = V , SW = AGND = PGND = 0V, C = 4.7F. Limits applying over J IN CC VCC the full operating temperature range are denoted by a Symbol Parameter Conditions Min Typ Max Units Power Supply Characteristics VCC regulating 5 22 V Input voltage range V IN VCC tied to VIN 4.5 5.5 I VIN input supply current Not switching, V = 12V, V = 0.7V 0.7 2 mA VIN IN FB I VCC quiescent current Not switching, V = V = 5V, V = 0.7V 0.7 2 mA VCC CC IN FB I VIN input supply current f=500kHz, R = 61.9k, VFB = 0.58V 17 mA VIN ON I Shutdown current Enable = 0V, V = 12V 1 A OFF IN Enable and Under-Voltage Lock-Out UVLO V EN pin rising threshold 1.8 1.9 2.0 V IH EN V EN pin hysteresis 50 mV EN HYS V EN pin rising threshold for 2.8 3.0 3.1 V IH EN DCM / CCM operation V EN pin hysteresis 100 mV EN HYS 2 / 18 maxlinear.com/XR79115 Rev 1D