MAX5060/MAX5061 19-3583 Rev 2 7/05 0.6V to 5.5V Output, Parallelable, Average-Current-Mode DC-DC Controllers General Description Features The MAX5060/MAX5061 pulse-width modulation (PWM) 4.75V to 5.5V or 7V to 28V Input Voltage Range DC-DC controllers provide high-output-current capability Adjustable Output Voltage from 0.6V to 5.5V in a compact package with a minimum number of exter- nal components. These devices utilize an average-cur- Up to 30A Output Current rent-mode control that enables optimal use of low Can Parallel Outputs For Higher Output Current R MOSFETs, eliminating the need for external DS(ON) heatsinks even when delivering high output currents. Programmable Adaptive Output Voltage Differential sensing (MAX5060) enables accurate control Positioning of the output voltage, while adaptive voltage positioning True-Differential Remote Output Sensing provides optimum transient response. An internal regula- (MAX5060) tor enables operation with 4.75V to 5.5V or 7V to 28V input voltage ranges. The high switching frequency, up Average-Current-Mode Control to 1.5MHz, allows the use of low-output inductor values Superior Current Sharing Between Paralleled and input capacitor values. This accommodates the use Modules of PC-board-embedded planar magnetics. Accurate Current Limit Eliminates MOSFET The MAX5060 features a clock output with 180 phase and Inductor Derating delay to control a second out-of-phase converter for Limits Reverse Current Sinking in Paralleled lower capacitor ripple currents. The MAX5060 also limits Modules (MAX5060) the reverse current if the bus voltage becomes higher than the regulated output voltage. The MAX5060 is Programmable Switching Frequency from 125kHz specifically designed to limit current sinking when multi- to 1.5MHz ple power-supply modules are paralleled. The Integrated 4A Gate Drivers MAX5060/MAX5061 offer an adjustable 0.6V to 5.5V out- put voltage. The MAX5060 offers an overvoltage protec- Clock Output for 180 Out-of-Phase Operation tion, power-good signal, and an output enable function. (MAX5060) The MAX5060/MAX5061 operate over the automotive Voltage Signal Proportional to Output Current for temperature range (-40C to +125C). The MAX5060 is Load Monitoring (MAX5060) available in a 28-pin thin QFN package while the MAX5061 is available in a 16-pin TSSOP package. Output Overvoltage Crowbar Protection (MAX5060) Applications Programmable Hiccup Current-Limit Threshold Servers and Workstations and Response Time Point-of-Load Telecom DC-DC Regulators Overtemperature Thermal Shutdown Networking Systems RAID Systems High-End Desktop Computers Ordering Information PKG Selector Guide PART TEMP RANGE PIN-PACKAGE CODE MAX5060ATI -40C to +125C 28 TQFN-EP* T2855-3 PART OUTPUT MAX5060ETI -40C to +85C 28 TQFN-EP* T2855-3 Average-Current-Mode DC-DC Controller MAX5061AUE -40C to +125C 16 TSSOP-EP* U16E-3 for 5V/12V/24V Input Bus with CLKOUT, MAX5060 Load Monitoring, Overvoltage, EN Input, MAX5061EUE -40C to +85C 16 TSSOP-EP* U16E-3 SYNC Input, and PGOOD Output *EP = Exposed pad. Average-Current-Mode DC-DC Controller Pin Configurations appear at end of data sheet. MAX5061 for 5V/12V/24V Input with SYNC/ENABLE Input 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. EVALUATION KIT AVAILABLE0.6V to 5.5V Output, Parallelable, Average-Current-Mode DC-DC Controllers ABSOLUTE MAXIMUM RATINGS IN to SGND.............................................................-0.3V to +30V All Other Pins to SGND...............................-0.3V to (V + 0.3V) CC BST to SGND..........................................................-0.3V to +35V Continuous Power Dissipation (T = +70C) A DH to LX.......................................-0.3V to (V - V ) + 0.3V 16-Pin TSSOP (derate 21.3mW/C above +70C)* ......1702mW BST LX DL to PGND (MAX5060).............................-0.3V to (V + 0.3V) 28-Pin TQFN (derate 34.5mW/C above +70C)*......2758mW DD DL to PGND (MAX5061).............................-0.3V to (V + 0.3V) Operating Temperature Range CC BST to LX..................................................................-0.3V to +6V MAX5060A and MAX5061A .................-40C to +125C V to SGND............................................................-0.3V to +6V MAX5060E and MAX5061E ....................-40C to +85C CC V , V to PGND ...................................................-0.3V to +6V Maximum Junction Temperature .....................................+150C CC DD SGND to PGND .....................................................-0.3V to +0.3V Storage Temperature Range .............................-60C to +150C Current Sink in PGOOD ........................................................6mA Lead Temperature (soldering, 10s) .................................+300C *Per JEDEC 51 standard. 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 = 5V, V = V (MAX5060 only), T = T = T to T , unless otherwise noted. Typical specifications are at T = +25C.) CC DD CC A J MIN MAX A (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SYSTEM SPECIFICATIONS 728 Input Voltage Range V V IN Short IN and V together for 5V input CC 4.75 5.50 operation Quiescent Supply Current I EN = V or SGND, not switching 2.7 5.5 mA Q CC Efficiency I = 20A, V = 12V, V = 3.3V 90 % LOAD IN OUT OUTPUT VOLTAGE No load, V = 4.75V to 5.5V, CC 0.594 0.6 0.606 SENSE+ to SENSE- Accuracy f = 500kHz V SW (MAX5060) (Note 2) No load, V = 7V to 28V, f = 500kHz 0.594 0.6 0.606 IN SW Clock Soft-Start Time t 1024 SS Cycles No load, V = 4.75V to 5.5V, CC 0.591 0.6 0.606 EAN Reference Voltage no switching V V REF (MAX5061) No load, V = 7V to 28V, no switching 0.591 0.6 0.606 IN STARTUP/INTERNAL REGULATOR V Undervoltage Lockout UVLO V rising 4.1 4.3 4.5 V CC CC V Undervoltage Lockout CC 200 mV Hysteresis V Output Voltage V = 7V to 28V, I = 0 to 60mA 4.85 5.1 5.30 V CC IN SOURCE MOSFET DRIVERS Low or high output, Output-Driver Impedance R 1.1 3 ON I = 20mA SOURCE/SINK Output-Driver Source/Sink Current I , I 4A DH DL Nonoverlap Time t C = 5nF 35 ns NO DH/DL 2 MAX5060/MAX5061