EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX17662 3.5V to 36V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter General Description Benefits and Features The MAX17662 is a high-efficiency, synchronous step- Reduces External Components and Total Cost down DC-DC converter with integrated MOSFETs oper- No SchottkySynchronous Operation ating over an input-voltage range of 3.5V to 36V. It can Internal Compensation Components deliver up to 2A current. Output voltage is programmable All-Ceramic Capacitors, Compact Layout from 0.6V up to 90% of V . Built-in compensation across IN Reduces Number of DC-DC Regulators to Stock the output-voltage range eliminates the need for external Wide 3.5V to 36V Input compensation components. Adjustable Output Voltage Range from 0.6V up to The MAX17662 features a peak-current-mode control ar- 90% of V IN chitecture. The MAX17662 can be operated in forced Delivers Up to 2A Over the Temperature Range pulse-width modulation (PWM), or discontinuous-conduc- 400kHz to 2.2MHz Adjustable Frequency tion mode (DCM) to enable high efficiency under full-load Available in a 16-pin, 3mm x 3mm TQFN Package and light-load conditions. The MAX17662 offers a low min- Reduces Power Dissipation imum on-time that allows high switching frequencies and Peak Efficiency of 95% a smaller solution size. DCM Mode Enable Enhanced Light-Load Efficiency The feedback-voltage regulation accuracy over -40C to Wide 2.4V to 12V Bootstrap Bias Input (EXTVCC) +125C is 1.33%. The device is available in a 16-pin for Improved Efficiency (3mm x 3mm) TQFN package. Simulation models are 6.5A Shutdown Current available. Operates Reliably in Adverse Industrial Environments Hiccup-Mode Overload Protection Applications Adjustable and Monotonic Startup with Prebiased Industrial Control Power Supplies Output Voltage General-Purpose Point-of-Load Built-in Output-Voltage Monitoring with RESET Distributed Supply Regulation Programmable EN/UVLO Threshold Base Station Power Supplies Overtemperature Protection Wall Transformer Regulation High Industrial -40C to +125C Ambient Operating High-Voltage, Single-Board Systems Temperature Range/-40C to +150C Junction Temperature Range Ordering Information appears at end of data sheet. Typical Application Circuit V IN 6.5V TO 36V C1 4.7F RT EN/UVLO VIN BST MODE C5 0.1F L1 VOUT VCC LX C3 5V,2A MAX17662 8.2H C4 2.2F R1 SGND FB FB 22F fSW : 500kHz R3 232k C1: 4.7F/50V/X7R/1206 (GRM31CR71H475KA12) 4.7 VOUT SS EXTVCC L1: 8.2H (XAL5050-822ME) FB C2 C6 R2 C4: 22F/25V/X7R/1210 (GRM32ER71E226ME15) 6800pF PGND RESET 31.6k 0.1F EP 19-100525 Rev 0 7/19MAX17662 3.5V to 36V, 2A, High-Efficiency, Synchronous Step-Down DC-DC Converter Absolute Maximum Ratings V to PGND ........................................................... -0.3V to +40V LX total RMS current ............................................................3.8A IN EN/UVLO to SGND ................................................ -0.3V to +40V Output Short-Circuit duration ......................................Continuous LX to PGND ................................................. -0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) IN A EXTVCC to SGND .................................................. -0.3V to +14V TQFN Multilayer Board (derate 23.1mW/C above BST to PGND ......................................................... -0.3V to +42V +70C) ......................................................................1847.6mW BST to LX .............................................................. -0.3V to +2.2V Operating Temperature Range (Note 1) .............-40C to +125C BST to V ............................................................. -0.3V to +40V Junction Temperature .......................................................+150C CC FB, SS, V , RT to SGND .................................... -0.3V to +2.2V Storage Temperature Range ..............................-65C to +150C CC MODE, RESET to SGND ......................................... -0.3V to +6V Lead Temperature (soldering, 10s) ...................................+300C PGND to SGND ..................................................... -0.3V to +0.3V Soldering Temperature (reflow) ........................................+260C Note 1: Junction temperature greater than +125C degrades operating lifetimes. 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 TQFN Package Code T1633+5C Outline Number 21-0136 Land Pattern Number 90-0032 Thermal Resistance, Four-Layer Board (Note 2) Junction-to-Ambient ( ) 38C/W JA Junction-to-Case Thermal Resistance ( ) 4C/W JC 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. Note 2: Package thermal resistances were obtained using the MAX17662 Evaluation Kit with no airflow. www.maximintegrated.com Maxim Integrated 2