EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX17024 Single Quick-PWM Step-Down Controller with Dynamic REFIN General Description Features The MAX17024 pulse-width modulation (PWM) controller Quick-PWM with Fast Transient Response provides high efficiency, excellent transient response, and Supports Any Output Capacitor high DC-output accuracy needed for stepping down high- No Compensation Required with Polymers/ voltage batteries to generate low-voltage core or chipset/ Tantalum RAM bias supplies in notebook computers. The output Stable with Ceramic Output Capacitors Using voltage can be controlled using the dynamic REFIN, External Compensation which supports input voltages between 0 to 2V. The Precision 2V 10mV Reference REFIN adjustability combined with a resistive voltage- Dynamically Adjustable Output Voltage divider on the feedback input allows the MAX17024 to be (0 to 0.9 x V Range) configured for any output voltage between 0 to 0.9 x V . IN IN Feedback Input Regulates to 0 to 2V REFIN Voltage Maxims proprietary Quick-PWM quick-response, con- 0.5% V Accuracy Over Line and Load OUT stant-on-time PWM control scheme handles wide input/ 26V Maximum Input Voltage Rating output voltage ratios (low-duty-cycle applications) with ease and provides 100ns instant-on response to load Resistively Programmable Switching Frequency transients while maintaining a relatively constant switch- Undervoltage/Thermal Protection ing frequency. Strong drivers allow the MAX17024 to effi- Voltage Soft-Start and Soft-Shutdown ciently drive large synchronous-rectifier MOSFETs. Monotonic Power-Up with Precharged Output The controller senses the current across the sense resis- tor series with the synchronous rectifier to achieve highly Power-Good Window Comparator accurate valley current-limit protection. The MAX17024 includes a voltage-controlled soft-start Ordering Information appears at end of data sheet. and soft-shutdown to limit the input surge current, provide a monotonic power-up (even into a precharged output), and provide a predictable power-up time. The control- ler also includes output undervoltage and thermal-fault Quick-PWM is a trademark of Maxim Integrated Products, Inc. protection. The MAX17024 is available in a tiny 14-pin, 3mm x 3mm Pin Configuration TDFN package. For space-constrained applications, refer to the MAX17016 single step-down with 26V internal TOP VIEW MOSFETs capable of supporting 10A continuous load. The MAX17016 is available in a small 40-pin, 6mm x 6mm 14 13 12 11 10 9 8 TQFN package. Applications Notebook Computers MAX17024 I/O and Chipset Supplies GPU Core Supply GND DDR MemoryVDDQ or VTT Point-of-Load Applications 1 2 3 4 5 6 7 Step-Down Power Supply TDFN (3mm x 3mm) 19-1040 Rev 4 7/19 V PGOOD DD DL V CC N.C. EN LX REF DH REFIN BST CS TON FBMAX17024 Single Quick-PWM Step-Down Controller with Dynamic REFIN Absolute Maximum Ratings TON to GND ..........................................................-0.3V to +28V DH to LX ..................................................-0.3V to (V + 0.3V) BST V to GND ............................................................-0.3V to +6V REF Short Circuit to GND .........................................Continuous DD V to GND ............................................. -0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) CC DD A EN, PGOOD to GND ...............................................-0.3V to +6V 14-Pin 3mm x 3mm TDFN REF, REFIN to GND ................................. -0.3V to (V + 0.3V) (derated 24.4mW/C above +70C) ..........................1951mW CC CS, FB to GND ......................................... -0.3V to (V + 0.3V) Operating Temperature Range (extended) ........ -40C to +85C CC DL to GND ................................................ -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C DD BST to GND .............................................. (V - 0.3V) to +34V Storage Temperature Range ............................ -65C to +150C DD BST to LX ................................................................-0.3V to +6V Lead Temperature (soldering, 10s) .................................+300C 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. Package Information PACKAGE TYPE: 14-PIN TDFN Package Code T1433+1 Outline Number 21-0137 Land Pattern Number 90-0062 For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a +, , or - in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. Electrical Characteristics (Circuit of Figure 1, V = 12V, V = V = V = 5V, REFIN = REF. T = 0C to +85C, unless otherwise specified. Typical values IN DD CC EN A are at T = +25C.) (Note 1) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS PWM CONTROLLER Input Voltage Range V 2 26 V IN Quiescent Supply Current (V ) I + I FB forced above REFIN 0.7 1.2 mA DD DD CC Shutdown Supply Current (V ) I EN = GND, T = +25C 0.1 2 A DD SHDN A V -to-V Resistance R 20 DD CC CC R = 97.5k (600kHz) 118 139 160 TON V = 12V, IN On-Time t V = 1.0V R = 200k (300kHz) 250 278 306 ns ON FB TON (Note 3) R = 302.5k 354 417 480 TON Minimum Off-Time t (Note 3) 200 300 ns OFF(MIN) EN = GND, V = 26V, TON TON Shutdown Supply Current 0.01 1 A V = 0V or 5V, T = +25C CC A REFIN Voltage Range V (Note 2) 0 V V REFIN REF REFIN Input Current I REFIN = 0.5V to 2V, T = +25C -50 +50 nA REFIN A FB Voltage Range V (Note 2) 0 V V FB REF Maxim Integrated 2 www.maximintegrated.com