MAX17003A/MAX17004A 19-0837 Rev 0 6/07 High-Efficiency, Quad-Output, Main Power- Supply Controllers for Notebook Computers General Description Features The MAX17003A/MAX17004A are dual step-down, Fixed-Frequency, Current-Mode Control switch-mode, power-supply (SMPS) controllers with 40/60 Optimal Interleaving synchronous rectification, intended for main 5V/3.3V Internal BST Switches power generation in battery-powered systems. Fixed- Internal 5V, 100mA Linear Regulator frequency operation with optimal interleaving minimizes Auxiliary Linear-Regulator Driver (12V or input ripple current from the lowest input voltages up to Adjustable Down to 1V) the 26V maximum input. Optimal 40/60 interleaving allows the input voltage to go down to 8.3V before duty- Dual Mode Feedback3.3V/5V Fixed or cycle overlap occurs, compared to 180 out-of-phase Adjustable Output Voltages regulators where the duty-cycle overlap occurs when 200kHz/300kHz/500kHz Switching Frequency the input drops below 10V. Undervoltage and Thermal-Fault Protection Output current sensing provides peak current-limit pro- Overvoltage-Fault Protection (MAX17003A 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 MAX17003A/MAX17004A and their gate drivers, as Soft-Start and Soft-Discharge (Voltage Ramp) well as external keep-alive loads. When the main PWM 8A (typ) Shutdown Current regulator 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 can be used with a TEMP PKG PART PIN-PACKAGE secondary winding to provide a 12V supply, or powered RANGE CODE directly from the main outputs to generate low-voltage -40C to 32 Thin QFN MAX17003AETJ+ T3255-4 outputs as low as 1V. +85C (5mm x 5mm) Independent enable controls and power-good signals -40C to 32 Thin QFN MAX17004AETJ+ T3255-4 allow flexible power sequencing. Voltage soft-start +85C (5mm x 5mm) gradually ramps up the output voltage and reduces +Denotes a lead-free package. inrush current, while soft-discharge gradually decrease the output voltage, preventing negative voltage dips. Pin Configuration The MAX17003A/MAX17004A feature output undervolt- age and thermal-fault protection. The MAX17003A also includes output overvoltage-fault protection. TOP VIEW The MAX17003A/MAX17004A are available in a 32-pin, 24 23 22 21 20 19 18 17 5mm x 5mm thin QFN package. The exposed backside 16 DH3 25 DH5 pad improves thermal characteristics for demanding linear keep-alive applications. BST5 BST3 26 15 27 14 DSCHG5 DSCHG3 Applications 28 13 CSL5 CSL3 MAX17003A Main Power Supplies 29 12 CSH3 CSH5 MAX17004A 2 to 4 Li+ Cell Battery-Powered Devices 30 11 FB5 FB3 Notebook and Subnotebook Computers FBA 31 10 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 ON3 LDO5 ON5 PGND DL5 REF GND LX5High-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 to 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 MAX17003A/MAX17004A