Click here for production status of specific part numbers. MAX17760 4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter General Description Benefits and Features The Himalaya series of voltage regulator ICs, power mod- Reduces External Components and Total Cost ules, and chargers enable cooler, smaller, and simpler No SchottkySynchronous Operation power supply solutions. The MAX17760 is a high-efficien- Internal Compensation Components cy, high-voltage, Himalaya synchronous step-down DC- All-Ceramic Capacitors, Compact Layout DC converter with integrated MOSFETs operating over an Reduces Number of DC-DC Regulators to Stock input-voltage range of 4.5V to 76V. The device can deliv- Wide 4.5V to 76V Input er up to 300mA current. Output voltage is programmable Adjustable Output Range from 0.8V up to 88% of from 0.8V up to 88% of input voltage (V ). Built-in control IN V IN loop compensation eliminates the need for external com- Up to 300mA Output Current ponents. 200kHz, 300kHz, 400kHz, and 600kHz The MAX17760 features a peak-current-mode control ar- Programmable Switching Frequency with External chitecture. The device can be operated in either the forced Clock Synchronization. pulse-width modulation (PWM) or pulse-frequency mod- Reduces Power Dissipation ulation (PFM) control schemes. Forced PWM mode pro- 93% Peak Efficiency vides constant frequency operation at all loads for fre- PFM Mode Enables Enhanced Light-Load quency sensitive applications, while PFM mode provides Efficiency superior light-load efficiency by skipping pulses. The de- EXTVCC Bootstrap Input for Improved Efficiency vice integrates an open drain RESET output voltage mon- 5A Shutdown Current itor, adjustable input undervoltage lockout (EN/UVLO) and programmable soft-start. Operates Reliably in Adverse Industrial Environments Built-in Hiccup Mode Overload Protection The feedback voltage regulation accuracy over -40C to Programmable Soft-Start and Prebiased Power-up +125C is +1.6% to -1.7%. The MAX17760 is available in Built-in Output-Voltage Monitoring with RESET a compact 12-pin (3mm x 3mm) TDFN package. Simula- Programmable EN/UVLO Threshold tion models are available. Overtemperature Protection CISPR 22 Class B Compliant Applications Wide -40C to +125C Ambient Operating Industrial Control Power Supplies Temperature Range/ -40C to +150C Junction General Purpose Point-of-Load Temperature Range Distributed Supply Regulation Base Station Power Supplies Ordering Information appears at end of data sheet. Wall Transformer Regulation High Voltage Single-Board Systems Simplified Application Circuit V IN V OUT VIN MMAAXX1177776600 LX EN/UVLO PGND SS FB RT/SYNC VCC EXTVCC VOUT MODE RESET EP SGND 19-100795 Rev 0 4/20MAX17760 4.5V to 76V, 300mA, High-Efficiency, Synchronous Step-Down DC-DC Converter Absolute Maximum Ratings V to SGND ........................................................... -0.3V to +80V Continuous Power Dissipation (Multilayer Board) (T = +70C, IN A EN/UVLO to SGND ....................... -0.3 to min((V + 0.3V), 26V) derate 24.4mW/C above +70C.) ...............................1951.2mW IN EXTVCC to SGND .................................................. -0.3V to +26V Output Short-Circuit Duration ......................................Continuous LX to PGND ....................................................-0.3 to (V + 0.3V) Operating Temperature Range (Note 1) .............-40C to +125C IN FB, RESET, SS, MODE, V , RT/SYNC to SGND . -0.3V to +6V Junction Temperature .......................................................+150C CC PGND to SGND ..................................................... -0.3V to +0.3V Storage Temperature Range ..............................-65C to +150C LX Total RMS Current ......................................................... 0.6A Lead Temperature (soldering, 10s) ...................................+300C 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 12 TDFN Package Code TD1233+1C Outline Number 21-0664 Land Pattern Number 90-0397 Thermal Resistance, Four-Layer Board: Junction to Ambient ( ) 41C/W JA Junction to Case ( ) 8.5C/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. Electrical Characteristics (V = 24V, EN/UVLO = unconnected, R = 69.8k (f = 400 kHz), V = V = V = V = 0V, C = IN RT/SYNC SW MODE PGND SGND EXTVCC VCC 1F, V = 1V, LX = SS = RESET = unconnected, T = T = -40C to 125C, unless otherwise noted. Typical values are at T = +25C. FB A J A All voltages are referenced to SGND, unless otherwise noted.) (Note 2 ) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY (V ) IN Input Voltage Range V 4.5 76 V IN Input Shutdown Current I V = 0V (shutdown mode) 2.5 5 10 A IN-SH EN/UVLO I MODE = Unconnected, V = 5V 75 A Q PFM EXTVCC Input Quiescent Current I V = 0.75V, Normal switching mode 2.5 mA Q PWM FB ENABLE/UVLO (EN/UVLO) V V rising 1.19 1.215 1.24 ENR EN/UVLO EN/UVLO Threshold V V falling 1.09 1.115 1.14 V ENF EN/UVLO V V falling, true shutdown 0.7 ENT EN/UVLO EN/UVLO Pullup I V = 1.215V 2.2 2.5 2.8 A EN/UVLO EN/UVLO Current 19-100795 www.maximintegrated.com Maxim Integrated 2