MAX17003/MAX17004 19-0765 Rev 0 3/07 High-Efficiency, Quad-Output, Main Power- Supply Controllers for Notebook Computers General Description Features The MAX17003/MAX17004 are dual step-down, switch- Fixed-Frequency, Current-Mode Control mode, power-supply (SMPS) controllers with synchro- 40/60 Optimal Interleaving nous rectification, intended for main 5V/3.3V power Internal BST Switches generation in battery-powered systems. Fixed-frequen- Internal 5V, 100mA Linear Regulator cy operation with optimal interleaving minimizes input Auxiliary Linear-Regulator Driver (12V or ripple current from the lowest input voltages up to the Adjustable Down to 1V) 26V maximum input. Optimal 40/60 interleaving allows the input voltage to go down to 8.3V before duty-cycle Dual Mode Feedback3.3V/5V Fixed or overlap occurs, compared to 180 out-of-phase regula- Adjustable Output Voltages tors where the duty-cycle overlap occurs when the 200kHz/300kHz/500kHz Switching Frequency input drops below 10V. Undervoltage and Thermal-Fault Protection Output current sensing provides peak current-limit pro- Overvoltage-Fault Protection (MAX17003 Only) tection, using either an accurate sense resistor or using 6V to 26V Input Range lossless inductor DCR current sensing. A low-noise 2V 0.75% Reference Output mode maintains high light-load efficiency while keeping the switching frequency out of the audible range. Independent Enable Inputs and Power-Good Outputs An internal, fixed 5V, 100mA linear regulator powers up the MAX17003/MAX17004 and their gate drivers, as well Soft-Start and Soft-Discharge (Voltage Ramp) as external keep-alive loads. When the main PWM regu- 8A (typ) Shutdown Current lator is in regulation, an automatic bootstrap switch bypasses the internal linear regulator, providing current Ordering Information up to 200mA. An additional adjustable linear-regulator driver with an external pnp transistor may be used with a PIN- PKG PART TEMP RANGE secondary winding to provide a 12V supply, or powered PACKAGE CODE directly from the main outputs to generate low-voltage 32 Thin QFN MAX17003ETJ+ -40C to +85C T3255-4 outputs as low as 1V. (5mm x 5mm) Independent enable controls and power-good signals 32 Thin QFN MAX17004ETJ+ -40C to +85C T3255-4 allow flexible power sequencing. Voltage soft-start grad- (5mm x 5mm) ually ramps up the output voltage and reduces inrush +Denotes lead-free package. current, while soft-discharge gradually decreases the output voltage, preventing negative voltage dips. The Pin Configuration MAX17003/MAX17004 feature output undervoltage and thermal-fault protection. The MAX17003 also includes output overvoltage-fault protection. TOP VIEW The MAX17003/MAX17004 are available in a 32-pin, 24 23 22 21 20 19 18 17 5mm x 5mm, thin QFN package. The exposed backside DH3 16 pad improves thermal characteristics for demanding 25 DH5 linear keep-alive applications. 15 BST5 BST3 26 DSCHG3 27 14 DSCHG5 Applications 28 13 CSL5 CSL3 Main Power Supplies MAX17003 CSH3 29 12 CSH5 MAX17004 2 to 4 Li+ Cell Battery-Powered Devices FB3 30 11 FB5 Notebook and Subnotebook Computers 31 10 FBA SKIP + PDAs and Mobile Communicators OUTA 32 9 FSEL 12 3 45 6 7 8 THIN QFN Dual Mode is a trademark of Maxim Integrated Products, Inc. 5mm x 5mm 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 ONA LX3 DRVA DL3 ILIM PGDALL SHDN IN LDO5 ON3 ON5 PGND DL5 REF LX5 GNDHigh-Efficiency, Quad-Output, Main Power- Supply Controllers for Notebook Computers ABSOLUTE MAXIMUM RATINGS IN, SHDN, DRVA, OUTA to GND............................-0.3V to +28V BST3, BST5 LDO5.................................................-0.3V to +0.3V LDO Short Circuit to GND ..........................................Momentary LDO5, ON3, ON5, ONA to GND ..............................-0.3V to +6V PGDALL, DSCHG3, DSCHG5 to GND.....................-0.3V to +6V REF Short Circuit to GND ...........................................Momentary DRVA Current (Sinking) ......................................................30mA CSL3, CSH3, CSL5, CSH5 to GND ..........................-0.3V to +6V OUTA Shunt Current ...........................................................30mA REF, FB3, FB5, FBA to GND...................-0.3V to (V + 0.3V) LDO5 SKIP, FSEL, ILIM to GND........................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) LDO5 A Multilayer PCB DL3, DL5 to PGND..................................-0.3V to (V + 0.3V) LDO5 BST3, BST5 to PGND .............................................-0.3V to +34V 32-Pin, 5mm x 5mm TQFN (derated 34.5mW/C above +70C) .........................2459mW BST3 to LX3..............................................................-0.3V to +6V Operating Temperature Range ...........................-40C to +85C DH3 to LX3 ..............................................-0.3V to (V + 0.3V) BST3 BST5 to LX5..............................................................-0.3V to +6V Junction Temperature......................................................+150C Storage Temperature Range .............................-65C to +150C DH5 to LX5 ..............................................-0.3V to (V + 0.3V) BST5 GND to PGND .......................................................-0.3V to +0.3V 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 (Circuit of Figure 1, V = 12V, both SMPS enabled, FSEL = REF, SKIP = GND, ILIM = LDO5, FBA = LDO5, I = I = I = IN REF LDO5 OUTA no load, T = 0C to +85C, unless otherwise noted. Typical values are at T = +25C.) A A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLIES (Note 1) LDO5 in regulation 5.4 26.0 V Input Voltage Range V V IN IN IN = LDO5, V < 4.4V 4.5 5.5 CSL5 LDO5 switched over to CSL5, either V Operating Supply Current I 20 36 A IN IN SMPS on V = 6V to 26V, both SMPS off, includes IN V Standby Supply Current I 65 120 A IN IN(STBY) I SHDN V Shutdown Supply Current I V = 6V to 26V 8 20 A IN IN(SHDN) IN Both SM P S on, FB3 = FB 5 = LDO5 , SKIP = GND , V = 3.5V, V = 5.3V, C S L 3 C S L 5 Quiescent Power Consumption P 3.5 4.5 mW Q V = 15V, OUT A P + P + P + P IN C S L 3 C S L 5 OUT A MAIN SMPS CONTROLLERS 3.3V Output Voltage in Fixed V = 6V to 26V, SKIP = FB3 = LDO5, IN V 3.265 3.315 3.365 V OUT3 Mode 0 < V - V < 50mV (Note 2) CSH3 CSL3 V = 6V to 26V, SKIP = FB5 = LDO5, IN 5V Output Voltage in Fixed Mode V 4.94 5.015 5.09 V OUT5 0 < V - V < 50mV (Note 2) CSH5 CSL5 V = 6V to 26V, FB3 or FB5 IN 1.980 2.010 2.040 duty factor = 20% to 80% Feedback Voltage in Adjustable V V FB Mode (Note 2) V = 6V to 26V, FB3 or FB5 IN 1.990 2.010 2.030 duty factor = 50% 2 MAX17003/MAX17004