EVALUATION KIT AVAILABLE Click here for production status of specific part numbers. MAX17506 4.5V60V, 5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation General Description Benefits and Features The MAX17506 high-efficiency, high-voltage, synchronous Reduces External Components and Total Cost step-down DC-DC converter with integrated high-side No Schottky-Synchronous Operation MOSFET operates over a 4.5V to 60V input. The Internal Compensation for Any Output Voltage converter can deliver up to 5A and generates output Built-In Soft-Start voltages from 0.9V up to 0.9 x V . The feedback (FB) All-Ceramic Capacitors, Compact Layout IN voltage is accurate to within 1.4% over -40C to 125C. Reduce Number of DC-DC Regulators to Stock The MAX17506 uses peak current-mode control. The Wide 4.5V to 60V Input device can be operated in the pulse-width modulation Adjustable Output-Voltage Range from 0.9V up to (PWM), pulse-frequency modulation (PFM), and 90% of V IN discontinuous conduction mode (DCM) control schemes. 100kHz to 2.2MHz Adjustable Switching Frequency with External Synchronization The device is available in a 20-pin (5mm x 5mm) Thin QFN (TQFN) package. Simulation models are available. Reduces Power Dissipation Peak Efficiency > 95% Applications PFM/DCM Modes Enables Enhanced Light-Load Industrial Power Supplies Efficiency Distributed Supply Regulation Auxiliary Bootstrap LDO for Improved Efficiency Base Station Power Supplies 3.5A Shutdown Current Wall Transformer Regulation Operates Reliably in Adverse Industrial Environments High-Voltage Single-Board Systems Hiccup or Latchoff Mode Overload Protection General-Purpose Point-of-Load DL to LX Short Detection Feature Built-In Output Voltage Monitoring with RESET Programmable EN/UVLO Threshold Ordering Information appears at end of data sheet. Monotonic Startup into Prebiased Load Overtemperature Protection High Industrial -40C to +125C Ambient Operating Temperature / -40C to +150C Junction Tempera- ture Range Typical Application Circuit for 5V Output fSW = 450kHz VIN L1 = XAL8080-472 6.5V TO 60V N1 = SIS468DN C6 = 2.2F/10V/X7R/0603(MURATA GRM188R71A225K) C1 C2 2.2F 2.2F C8 = C9 = C10 = 22F/10V/X7R/1210(MURATA GRM32ER71A226K) C13 = 0.1F/50V/X7R/0402(TDK C1005X7R1H104K050BB) EN/UVLO MODE/SYNC: 1. CONNECT TO SGND FOR PWM MODE VIN VIN VIN VIN RT 2. CONNECT TO VCC FOR DCM MODE BST 3. LEAVE OPEN FOR PFM MODE MODE/SYNC C11 0.1F V VOUT CC LX L1 C6 V OUT 2.2F MAX17506 LX SGND 4.7H 5V, 5A LX C8 C9 C10 22F 22F 22F CF R1 DL RESET 4.7 R3 N1 158k SS PGND EXTVCC FB C7 R8 22000pF VOUT 4.7 R4 C13 34.8k 0.1F 19-7453 Rev 3 7/18MAX17506 4.5V60V, 5A, High-Efficiency, Synchronous Step-Down DC-DC Converter with Internal Compensation Absolute Maximum Ratings V to PGND .........................................................-0.3V to +65V LX Total RMS Current ........................................................9.9A IN EN/UVLO, SS to SGND ........................................-0.3V to +65V Output Short-Circuit Duration ....................................Continuous LX to PGND................................................-0.3V to (V + 0.3V) Continuous Power Dissipation (T = +70C) (multilayer board) IN A BST to PGND ........................................................-0.3V to +70V TQFN (derate 33.3mW/C above T = +70C) ......2666.7mW A BST to LX .............................................................-0.3V to +6.5V Operating Temperature Range (Note 1) ........... -40NC to +125C BST to V ...........................................................-0.3V to +65V Junction Temperature ......................................................+150C CC FB, CF, RESET, MODE/SYNC, RT to SGND ......-0.3V to +6.5V Storage Temperature Range ............................ -65NC to +160C DL, V to PGND ................................................-0.3V to +6.5V Lead Temperature (soldering, 10s) .................................+300C CC SGND to PGND ....................................................-0.3V to +0.3V Soldering Temperature (reflow) .......................................+260C EXTVCC to PGND ................................................-0.3V to +26V 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: 20 TQFN Package Code T2055+4 Outline Number 21-0140 Land Pattern Number 90-0009 THERMAL RESISTANCE, FOUR-LAYER BOARD Junction to Ambient ( ) (Note 2) 23C/W JA Junction to Case ( ) 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. Note 1: Junction temperature greater than +125C degrades operating lifetimes. Note 2: Applicable only to the Evaluation Kit in free space with no airflow. www.maximintegrated.com Maxim Integrated 2