EVALUATION KIT AVAILABLE MAX17501 60V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter General Description Benefits and Features Eliminates External Components and Reduce Total Cost The MAX17501 high-efficiency, high-voltage, synchro nous No Schottky-Synchronous Operation for High step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. This Efficiency and Reduced Cost device is offered in a fixed 3.3V, 5V, or adjustable output Internal Compensation and Feedback Divider for voltage (0.9V to 92%V ) while delivering up to 500mA 3.3V and 5V Fixed Outputs IN of current. The output voltage is accurate to within All-Ceramic Capacitors, Ultra-Compact Layout 1.7% over -40C to +125C. The MAX17501 is available Reduces Number of DC-DC Regulators to Stock in a compact TDFN package. Simulation models are Wide 4.5V to 60V Input Voltage Range available. 0.9V to 92%V Adjustable Output Voltage IN Delivers Up to 500mA The device features peak-current-mode control with 600kHz and 300kHz Switching Frequency Options pulse-width modulation (PWM). Users can choose devices Available in a 10-Pin, 3mm x 2mm TDFN Package with either pulse frequency modulation (PFM) or forced Reduces Power Dissipation PWM scheme. PFM devices skip pulses at light load Peak Efficiency > 90% for higher efficiency, while forced-PWM devices operate PFM Feature for High Light-Load Efficiency with fixed switching frequency at any load for noise sensitive- applications. The low-resistance, on-chip MOSFETs Shutdown Current = 0.9A (typ) Operates Reliably in Adverse Industrial Environments ensure high efficiency at full load and simplify the layout. Hiccup-Mode Current Limit, Sink Current Limit, and A programmable soft-start feature allows users to reduce Autoretry Startup input inrush current. The device also incorporates an Built-In Output-Voltage Monitoring (Open-Drain output enable/undervoltage lockout pin (EN/UVLO) that RESET Pin) allows the user to turn on the part at the desired input- Resistor-Programmable EN/UVLO Threshold voltage level. An open-drain RESET pin provides a Adjustable Soft-Start and Prebiased Power-Up delayed power-good signal to the system upon achieving High Industrial -40C to +125C Ambient Operating successful regulation of the output voltage. Temperature Range/-40C to +150C Junction Temperature Range Applications Industrial Process Control HVAC and Building Control Base Station, VOIP, Telecom Ordering Information/Selector Guide appears at end of data sheet. Home Theatre Battery-Powered Equipment General-Purpose Point-of-Load 19-6244 Rev 7 7/16MAX17501 60V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter Absolute Maximum Ratings V to GND.............................................................-0.3V to +70V Continuous Power Dissipation (T = +70C) IN A EN/UVLO to GND.......................................-0.3V to (V + 0.3V) (derate 14.9mW/C above +70C) (multilayer board) .1188.7mW IN LX to PGND................................................-0.3V to (V + 0.3V) Junction Temperature......................................................+150C IN FB, RESET, COMP, SS to GND .............................-0.3V to +6V Storage Temperature Range............................. -65C to +160C V to GND..............................................................-0.3V to +6V Lead Temperature (soldering, 10s).................................+300C CC GND to PGND.......................................................-0.3V to +0.3V Soldering Temperature (reflow).......................................+260C LX Total RMS Current......................................................... 1.6A Output Short-Circuit Duration.....................................Continuous 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. Junction temperature greater than +125C degrades operating lifetimes. Package Thermal Characteristics (Note 1) TDFN Junction-to-Ambient Thermal Resistance ( ) .......67.3C/W JA Junction-to-Case Thermal Resistance ( ) ............18.2C/W JC Note 1: 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, V = V = 0V, C = C = 1F, V = 1.5V, C = 3300pF, V = 0.98 x V , LX = unconnected, RESET = IN GND PGND VIN VCC EN SS FB OUT unconnected. T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C. All voltages are referenced to GND, A A unless otherwise noted.) (Note 2) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY (V ) IN Input Voltage Range V 4.5 60 V IN I V = 0V, shutdown mode 0.9 3.5 IN-SH EN A I V = 1.03 x V , MAX17501A/B 90 145 IN-HIBERNATE FB OUT Input Supply Current MAX17501E/F/G 4.75 6.75 Normal switching I mA IN-SW mode, no load MAX17501H 2.5 3.6 ENABLE/UVLO (EN/UVLO) V V rising 1.194 1.218 1.236 ENR EN EN Threshold V V falling 1.114 1.135 1.156 V ENF EN V V falling, true shutdown 0.7 EN-TRUESD EN EN Input Leakage Current I V = V = 60V, T = +25C 8 200 nA EN EN IN A LDO 6V < V < 12V, 0mA < I < 10mA, IN VCC V Output Voltage Range V 4.65 5 5.35 V CC CC 12V < V < 60V, 0mA < I < 2mA IN VCC V Current Limit I V = 4.3V, V = 12V 15 40 80 mA CC VCC-MAX CC IN V Dropout V V = 4.5V, I = 5mA 4.1 V CC CC-DO IN VCC V V rising 3.85 4 4.15 CC-UVR CC V UVLO V CC V V falling 3.55 3.7 3.85 CC-UVF CC Maxim Integrated 2 www.maximintegrated.com