MAX17528 19-4723 Rev 0 7/09 1-Phase Quick-PWM Intel IMVP-6.5/GMCH Controllers General Description Features 1-Phase Quick-PWM Controller The MAX17528 comprises 1-phase Quick-PWM step- down VID power-supply controllers for Intel notebook 0.5% V Accuracy Over Line, Load, and OUT CPUs. The Quick-PWM control provides instantaneous Temperature response to fast-load current steps. Active voltage 7-Bit IMVP-6.5 DAC positioning reduces power dissipation and bulk output IMVP-6.5 and GMCH Compliant capacitance requirements and allows ideal positioning Active Voltage Positioning with Adjustable Gain compensation for tantalum, polymer, or ceramic bulk Accurate Droop and Current Limit output capacitors. Remote Output and Ground Sense The MAX17528 is intended for two different notebook CPU/GPU core applications: either bucking down the bat- Adjustable Output-Voltage Slew Rate tery directly to create the core voltage, or bucking down Power-Good Window Comparator the +5V system supply. The single-stage conversion Current Monitor method allows these devices to directly step down high- Temperature Comparator voltage batteries for the highest possible efficiency. Drives Large Synchronous Rectifier FETs Alternatively, 2-stage conversion (stepping down the +5V system supply instead of the battery) at higher 2V to 26V Battery Input Range switching frequency provides the minimum possible Adjustable Switching Frequency (600kHz max) physical size. Undervoltage and Thermal-Fault Protection A slew-rate controller allows controlled transitions Soft-Startup and Soft-Shutdown between VID codes. A thermistor-based temperature Internal Boost Diode sensor provides programmable thermal protection. A current monitor provides an analog output current pro- Ordering Information portional to the processor load current. The MAX17528 implements both the Intel IMVP-6.5 PART TEMP RANGE PIN-PACKAGE CPU core specifications (CLKEN pullup to 3.3V), as o o MAX17528GTJ+ -40 C to +105C 32 TQFN-EP* well as the Intel GMCH graphics core specifications +Denotes a lead(Pb)-free/RoHS-compliant package. (CLKEN = GND). The MAX17528 is available in a 32-pin, 5mm x 5mm TQFN package. *EP = Exposed pad. Pin Configuration Applications IMVP-6.5 Core Power Supply TOP VIEW Intel GMCH 2009 24 23 22 21 20 19 18 17 Intel Calpella Platforms LX 25 16 D2 Graphics Core Power Supply DH 26 15 D1 Voltage-Positioned Step-Down Converters 14 D0 PGDIN 27 1-to-4 Lithium-Ion (Li+)-Cell Battery-to-CPU Core GND VRHOT 28 13 Supply Converters MAX17528 TIME 29 12 CLKEN Notebooks/Desktops/Servers PAD ILIM 30 11 SHDN GND 31 10 PWRGD V CC 32 9 CCV TON 12 3 45 6 7 8 THIN QFN 5mm x 5mm Quick-PWM is a trademark of Maxim Integrated Products, Inc. Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com. EVALUATION KIT AVAILABLE IMON BST GNDS V DD FB DL CSN PGND D6 CSP SLOW D5 D4 SKIP D3 THRM1-Phase Quick-PWM Intel IMVP-6.5/GMCH Controllers ABSOLUTE MAXIMUM RATINGS V , V to GND .....................................................-0.3V to +6V BST to GND............................................................-0.3V to +36V CC DD D0D6 to GND..........................................................-0.3V to +6V LX to BST..................................................................-6V to +0.3V CSP, CSN to GND ....................................................-0.3V to +6V BST to V .............................................................-0.3V to +30V DD ILIM, THRM, PGDIN, VRHOT, PWRGD to GND .......-0.3V to +6V DH to LX....................................................-0.3V to (V + 0.3V) BST CLKEN to GND.........................................................-0.3V to +6V Continuous Power Dissipation (32-pin, 5mm x 5mm TQFN) SKIP, SLOW to GND.................................................-0.3V to +6V Up to +70C ..............................................................1702mW CCV, FB, IMON, TIME to GND ...................-0.3V to (V + 0.3V) Derating above +70C ..........................................21.3mW/C CC SHDN to GND (Note 1)...........................................-0.3V to +30V Operating Temperature Range .........................-40C to +105C TON to GND ...........................................................-0.3V to +30V Junction Temperature......................................................+150C GNDS, PGND to GND ...........................................-0.3V to +0.3V Storage Temperature Range .............................-65C to +165C DL to PGND................................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DD Note 1: SHDN can be forced to 12V for the purpose of debugging prototype breadboards using the no-fault test mode, which dis- ables fault protection. 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 (Circuit of Figure 1, V = 12V, V = V = 5V, CLKEN pullup to 3.3V with 1.9k, SHDN = SLOW = ILIM = PGDIN = V , SKIP = IN DD CC CC GNDS = PGND = GND, V = V = V = 1.200V, D0D6 set for 1.20V (D0D6 = 0001100). T = 0C to +85C, unless otherwise FB CSP CSN A specified. Typical values are at T = +25C.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS PWM CONTROLLER Input-Voltage Range V , V 4.5 5.5 V CC DD DAC codes from -0.5 +0.5 % Measured at FB with 0.8125V to 1.5000V respect to GNDS DAC codes from DC Output-Voltage Accuracy includes load- -7 +7 0.3750V to 0.8000V regulation error mV (Note 3) DAC codes from 0V -20 +20 to 0.3625V Boot Voltage V IMVP-6.5 (CLKEN pullup to 3.3V with 1.9k ) 1.094 1.100 1.106 V BOOT Line Regulation Error V = 4.5V to 5.5V, V = 4.5V to 26V 0.1 % CC IN GNDS Input Range -200 +200 mV GNDS Gain A V / V , -200mV V +200mV 0.97 1.00 1.03 V/V GNDS OUT GNDS GNDS GNDS Input Bias Current I T = +25C -2 +2 A GNDS A V = 4.5V to 5.5V, CC TIME Voltage V 1.985 2.000 2.015 V TIME I = 28A (R = 71.5k ) TIME TIME R = 71.5k (12.5mV/s nominal) -10 +10 TIME R = 35.7k (25mV/s nominal) to TIME -15 +15 178k (5mV/s nominal) Soft-start and soft-shutdown TIME Slew-Rate Accuracy % -20 +20 R = 35.7k (3.125mV/s nominal) to TIME 178k (0.625mV/s nominal) SLOW = GND, R = 35.7k (12.5mV/s nominal) to -20 +20 TIME 178k (2.5mV/s nominal) 2 MAX17528