Click here for production status of specific part numbers. MAX17686 4.5V to 60V Input, High-Efficiency, Iso-Buck DC-DC Converter General Description Benefits and Features The Rainier series of isolated DC-DC products enable Reduces External Components and Total Cost small, efficient solutions with a lower BOM cost. The No Optocoupler MAX17686 is a high-voltage, high-efficiency, iso-buck Synchronous Primary Operation DC-DC converter designed to provide isolated power up to All-Ceramic Capacitors, Compact Layout 5W. The device operates over a wide 4.5V to 60V input and Supports Numerous Isolated DC-DC Applications uses primary-side feedback to regulate the output voltage. Wide 4.5V to 60V Input The MAX17686 uses peak-current-mode control. The low- Delivers Up to 5W Output Power resistance, on-chip MOSFETs ensure high efficiency at full Reduces Power Dissipation load while simplifying the PCB layout. Peak Efficiency > 90% The device generates a well regulated primary side 0.9A (typ) Shutdown Current voltage which is then scaled by a suitable transformer Operates Reliably in Adverse Industrial Environments turns ratio to derive isolated secondary output rails. The Peak and Sink Current-Limit Protection MAX17686 features robust overcurrent protection on both Robust Secondary-Side Output Overcurrent the primary and secondary side. Protection The MAX17686 is available in a compact 10-pin (3mm x 1.7% Feedback Accuracy 2mm) TDFN package. Simulation model and design auto- Programmable EN/UVLO Threshold mation are available in EE-Sim. Adjustable Soft-Start Overtemperature Protection Applications -40C to +125C Operation Isolated Fieldbus Interfaces PLC I/O Modules Smart Meters Ordering Information appears at end of data sheet. Isolated Power Supplies in Medical Equipment Floating Power Supply Generation Application Circuit T1 D1 VOUT V IN 1:2.4 24V, 100mA 17V TO 60V V LX IN C1 R4 4.7F EN/UVLO 49.9 PGND C7 NPRI NSEC 4.7F Z1 V CC GND C3 1F MAX17686 C2 R1 22F 110k SS C4 FB 33nF R2 10.5k C8 1nF COMP RESET R3 3.74k C6 820pF C5 82nF 19-100448 Rev 1 4/19MAX17686 4.5V to 60V Input, High-Efficiency, Iso-Buck DC-DC Converter Absolute Maximum Ratings V to GND ............................................................-0.3V to +65V Output Short-Circuit Duration ....................................Continuous IN EN/UVLO to GND...................................... -0.3V to (V + 0.3V) Operating Temperature Range ......................... -40C to +125C IN LX to PGND............................................... -0.3V to (V + 0.3V) Junction Temperature ......................................................+150C IN V , FB, RESET, COMP, SS to GND ....................-0.3V to +6V Storage Temperature Range ............................ -65C to +160C CC PGND to GND ......................................................-0.3V to +0.3V Lead Temperature (soldering, 10s) .................................+300C LX Total RMS Current ........................................................1.6A Soldering Temperature (reflow) .......................................+260C 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: 10 TDFN Package Code T1032N+1 Outline Number 21-0429 Land Pattern Number 90-0082 THERMAL RESISTANCE, FOUR-LAYER BOARD (N ote 1) Junction to Ambient ( ) 67.3C/W JA Junction to Case ( ) 18.2C/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. Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial. Note 1: Continuous Power Dissipation (T = +70C) (derate 14.9mW/C above +70C) (multilayer board) 1188.7mW A Maxim Integrated 2 www.maximintegrated.com