MAX8552 3 . N 0 F m D m T x 19-2997 Rev 0 10/03 High-Speed, Wide-Input, Single-Phase MOSFET Driver General Description Features The MAX8552 highly integrated monolithic MOSFET dri- Single-Phase Synchronous Drivers ver is capable of driving a pair of power MOSFETs in Up to 24V (max) Input Voltage single or multiphase synchronous buck-converter appli- cations that provide up to 30A output current per 0.1A (typ) Quiescent Current in Shutdown Over phase. The MAX8552 simplifies PC board layout in mul- Temperature tiphase systems, particularly three phases and higher. 0.5/1.0 /0.7 /1.3 R Drivers OUT High input voltages up to 24V allow the MAX8552 to be used in desktop, notebook, and server applications. 12ns (typ) Propagation Delay Each MOSFET driver is capable of driving 3000pF 11ns (typ) Rise/Fall Times with 3000pF Load capacitive loads with only 12ns propagation delay and Adaptive Dead Time and User-Programmable 11ns (typ) rise and fall times, making the MAX8552 ideal for high-frequency applications. Delay Mode User-programmable break-before-make circuitry pre- Up to 2MHz Operation with TDFN Package vents shoot-through currents, maximizing converter effi- Up to 1.2MHz Operation with MAX Package ciency. An enable input allows total driver shutdown (<1A typ) for power-sensitive portable applications. Enable Function The PWM control input is compatible with TTL and TTL- and CMOS-Compatible Logic Inputs CMOS logic levels. The MAX8552, along with the Available in a Space-Saving Thin DFN Package MAX8524 or the MAX8525 multiphase controllers, pro- vides flexible 2-, 3-, 4-, 6-, or 8-phase CPU core-voltage supplies. The MAX8552 is available in space-saving 10-pin TDFN Ordering Information and MAX packages and is specified for -40C to PART TEMP RANGE PIN-PACKAGE +85C operation. MAX8552EUB -40C to +85C 10 MAX Applications 10 TDFN MAX8552ETB -40C to +85C Multiphase Buck Converters 3mm x 3mm Voltage Regulator Modules (VRMs) Processor-Core Voltage Regulators Pin Configurations appear at end of data sheet. Desktops, Notebooks, and Servers Switching Power Supplies Typical Operating Circuit V V CC IN 4.5V TO 6.5V 6V TO 24V V BST CC GND DH ON V OUT EN MAX8552 LX OFF 1.45V AT 20A DLY DL PWM CONTROL PWM PGND SIGNAL Maxim Integrated Products 1 For pricing delivery, and ordering information please contact Maxim/Dallas Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. N 3 I . P 0 - m 8 mHigh-Speed, Wide-Input, Single-Phase MOSFET Driver ABSOLUTE MAXIMUM RATINGS V to GND..............................................................-0.3V to +7V Continuous Power Dissipation (T = +70C) CC A PWM, EN, DL, DLY to GND........................-0.3V to (V + 0.3V) 10-Pin MAX (derate 5.6mW/C above +70C) ........444.4mW CC BST to PGND..........................................................-0.3V to +35V 10-Pin TDFN (derate 24.4mW/C above +70C) .......1951mW LX to PGND ...............................................................-1V to +28V Operating Temperature Range ...........................-40C to +85C DH to PGND..............................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C BST DH, BST to LX...........................................................-0.3V to +7V Storage Temperature Range .............................-65C to +150C DH and DL Continuous Current......................................200mA Lead Temperature (soldering, 10s) .................................+300C Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. ELECTRICAL CHARACTERISTICS (V = V = V = V = 5V, V = V = V = 0V T = -40C to +85C, unless otherwise noted. Typical values are at T = CC BST DLY EN GND PGND LX A A +25C.) (Note 1) PARAMETER CONDITIONS MIN TYP MAX UNITS UNDERVOLTAGE PROTECTION V Supply Voltage Range 4.5 6.5 V CC V rising 3.25 3.80 CC Undervoltage Lockout (UVLO) 0.25V hysteresis V V falling 3.0 3.5 CC PWM = GND or V , CC 0.04 1 T = +25C A Shutdown Supply Current V = 0V, V = 6.5V A EN CC PWM = GND or V , CC 0.1 T = +85C A V = 6.5V, PWM = GND, CC Idle Supply Current (I ) No switching 330 500 A CC R = 47k DLY PWM = GND 25 50 A No switching PWM = V 23 mA CC Control Supply Current (I ) GND f = 250kHz, PWM Switching 1.8 3 mA 50% duty cycle PWM = GND 0.1 10 A No switching, I CC PWM = V 1.2 2 mA CC Driver Supply Current (I ) PWM = GND 0.1 10 A PGND No switching, I BST PWM = V 1.2 2 CC mA Switching, I + I 250kHz 2 4 BST CC DRIVER SPECIFICATIONS (See the Timing Diagram) V = 4.5V 1.3 2.4 PWM = GND, BST sourcing current V = 5V 1.2 BST DH Driver Resistance V = 4.5V 0.7 1.1 BST PWM = V , CC sinking current V = 5V 0.6 BST 2 MAX8552