EVALUATION KIT AVAILABLE MAX17000 Complete DDR2 and DDR3 Memory Power-Management Solution General Description Features SMPS Regulator (VDDQ) The MAX17000 pulse-width modulation (PWM) con- Quick-PWM with 100ns Load-Step Response troller provides a complete power solution for notebook Output VoltagesPreset 1.8V, 1.5V, or DDR, DDR2, and DDR3 memory. It comprises a step- Adjustable 1.0V to 2.5V down controller, a source/sink LDO regulator, and a ref- 1% V Accuracy Over Line and Load OUT erence buffer to generate the required VDDQ, VTT, and 26V Maximum Input Voltage Rating VTTR rails. Accurate Valley Current-Limit Protection The VDDQ rail is supplied by a step-down converter 200kHz to 600kHz Switching Frequency using Maxims proprietary Quick-PWM controller. The Source/Sink Linear Regulator (VTT) high-efficiency, constant-on-time PWM controller han- 2A Peak Source/Sink dles wide input/output voltage ratios (low duty-cycle Low-Output Capacitance Requirement applications) with ease and provides 100ns response Output Voltages-Preset VDDQ/2 or REFIN to load transients while maintaining a relatively constant Adjustable from 0.5V to 1.5V switching frequency. The Quick-PWM architecture cir- Low Quiescent Current Standby State cumvents the poor load-transient timing problems of Soft-Start/Soft-Shutdown fixed-frequency current-mode PWMs while also avoid- SMPS Power-Good Window Comparator ing the problems caused by widely varying switching frequencies in conventional constant-on-time and con- VTT Power-Good Window Comparator stant-off-time PWM schemes. The controller senses the Selectable Overvoltage Protection current to achieve an accurate valley current-limit pro- Undervoltage/Thermal Protections tection. It is also built in with overvoltage, undervoltage, 3mA Reference Buffer (VTTR) and thermal protections. The MAX17000 can be set to run in three different modes: power-efficient SKIP mode, low-noise forced-PWM mode, and standby Ordering Information mode to support memory in notebook computer stand- PART TEMP RANGE PIN-PACKAGE by operation. The switching frequency is programma- ble from 200kHz to 600kHz to allow small components MAX17000ETG+ -40C to +85C 24 TQFN-EP* and high efficiency. The VDDQ output voltage can be +Denotes a lead(Pb)-free/RoHS-compliant package. set to a preset 1.8V or 1.5V, or be adjusted from 1.0V to *EP = Exposed pad. 2.5V by an external resistor-divider. This output has 1% accuracy over line-and-load operating range. Pin Configuration The MAX17000 includes a 2A source/sink LDO regu- lator for the memory termination VTT rail. This VTT regu- TOP VIEW lator has a 5mV deadband that either sources or sinks, ideal for the fast-changing load burst present in memory termination applications. This feature also 18 17 16 15 14 13 reduces output capacitance requirements. V 12 19 CSL DD The VTTR reference buffer sources and sinks 3mA, 11 FB PGND1 20 providing the reference voltage needed by the memory controller and devices on the memory bus. REFIN AGND 21 10 MAX17000ETG+ The MAX17000 is available in a 24-pin, 4mm x 4mm, SKIP 22 9 VTTI TQFN package. V 23 8 VTT CC Applications 7 PGND2 Notebook Computers SHDN 24 DDR, DDR2, and DDR3 Memory Supplies 1 2 3 45 6 SSTL Memory Supplies TQFN 4mm x 4mm Quick-PWM is a trademark of Maxim Integrated Products, Inc. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com. 19-4125 Rev 2 4/13 DL OVP PGOOD1 BST PGOOD2 LX STDBY DH VTTS TON VTTR CSHMAX17000 Complete DDR2 and DDR3 Memory Power-Management Solution ABSOLUTE MAXIMUM RATINGS TON to PGND1.......................................................-0.3V to +28V VTTI to PGND2 .........................................................-0.3V to +6V V to PGND1..........................................................-0.3V to +6V VTT to PGND2 ............................................-0.3V to (V + 0.3V) DD TTI V to V ............................................................-0.3V to +0.3V VTTS to AGND............................................-0.3V to (V + 0.3V) CC DD CC OVP to AGND...........................................................-0.3V to +6V VTTR to AGND ..........................................-0.3V to (V + 0.3V) CSL SHDN, STDBY, SKIP to AGND.................................-0.3V to +6V PGND1, PGND2 to AGND.....................................-0.3V to +0.3V REFIN, FB, PGOOD1, Continuous Power Dissipation (T = +70C) A PGOOD2 to AGND ................................-0.3V to (V + 0.3V) 24-Pin, 4mm x 4mm TQFN-EP CC CSH, CSL to AGND....................................-0.3V to (V + 0.3V) (derated 27.8mW/C above +70C) ..........................2222mW CC DL to PGND1..............................................-0.3V to (V + 0.3V) Operating Temperature Range ...........................-40C to +85C DD BST to PGND1...........................................................-1V to +34V Junction Temperature......................................................+150C BST to LX..................................................................-0.3V to +6V Storage Temperature Range .............................-65C to +150C DH to LX....................................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C BST BST to V .............................................................-0.3V to +28V DD 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 = 12V, V = V = V = V = 5V, V = 1.8V, STDBY = SKIP = AGND, T = 0C to +85C, unless otherwise noted. IN CC DD SHDN REFIN CSL A Typical values are at T = +25C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS PWM CONTROLLER V 3 26 IN Input Voltage Range V V , V 4.5 5.5 CC DD FB = AGND 1.485 1.500 1.515 V = 4.5V to 26V, IN Output Voltage Accuracy V FB = V 1.782 1.800 1.818 V CSL CC SKIP = V CC FB = Adj 0.99 1.000 1.01 Output Voltage Range V 1 2.7 V CSL Load Regulation Error V - V = 0 to 18mV, SKIP = V 0.1 % CSH CSL CC Line Regulation Error V = 4.5V to 5.5V, V = 4.5V to 26V 0.25 % DD IN Soft-Start Ramp Time t Rising edge of SHDN 1.4 2.1 ms SSTART Soft-Stop Ramp Time t Falling edge of SHDN 2.8 ms SSTOP Soft-Stop Threshold 25 mV R = 96.75k TON -15 +15 (600kHz), 167ns nominal V = 12V, R = 200k (300kHz), IN TON On-Time Accuracy (Note 2) t -10 +10 % ON V = 1.2V 333ns nominal CSL R = 303.25k TON -15 +15 (200kHz), 500ns nominal 2 Maxim Integrated