EVALUATION KIT AVAILABLE MAX15062 60V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters General Description Benefits and Features The MAX15062 high-efficiency, high-voltage, synchronous Eliminates External Compo nents and Reduces Total Cost step-down DC-DC converter with integrated MOSFETs operates over a 4.5V to 60V input voltage range. The No SchottkySynchrono us Operation for High Efficiency and Reduced Cost converter delivers output current up to 300mA at 3.3V (MAX15062A), 5V (MAX15062B), and adjustable output Internal Compensation Internal Feedback Divider for Fixed 3.3V, 5V voltages (MAX15062C). The device operates over the Output Voltages -40C to +125C temperature range and is available in a Internal Soft-Start compact 8-pin (2mm x 2mm) TDFN package. Simulation All-Ceramic Capacitors, Ultra-Compact Layout models are available. Redu ces Number of DC-DC Regulators to Stock The device employs a peak-current-mode control archi- Wide 4.5V to 60V Input Voltage Range tecture with a MODE pin that can be used to operate the Fixed 3.3V and 5V Output Voltage Options device in pulse-width modulation (PWM) or pulse-fre- Adjustable 0.9V to 0.89 x V Output Voltage Option quency modulation (PFM) control schemes. PWM opera- IN Delivers Up to 300mA Load Current tion provides constant frequency operation at all loads Configurable Between PFM and Forced-PWM and is useful in applications sensitive to variable switch- Modes ing frequency. PFM operation disables negative inductor Redu ces Power Dissipation current and additionally skips pulses at light loads for high Peak Efficiency = 92% efficiency. The low-resistance on-chip MOSFETs ensure PFM Feature for High Light-Load Efficiency high efficiency at full load and simplify the PCB layout. Shutdown Current = 2.2A (typ) To reduce input inrush current, the device offers an Operates Reliably in Adverse Industrial Environments internal soft-start. The device also incorporates an EN/ Hiccup-Mode Current Limit and Autoretry Startup UVLO pin that allows the user to turn on the part at the Built-In Output Voltage Monitoring with Open-Drain desired input-voltage level. An open-drain RESET pin can RESET Pin be used for output-voltage monitoring. Programmable EN/UVLO Threshold Monotonic Startup into Prebiased Output Applications Overtemperature Protection Process Control High Industrial -40C to +125C Ambient Operating Industrial Sensors Temperature Range/-40C to +150C Junction 420 mA Current Loops Temperature Range HVAC and Building Control High -Voltage LDO Replace ment Typical Operating Circuit General-Purpose Point-of-L oad L1 33H V V OUT IN 4.5V TO 3.3V, V LX IN C IN 300mA 60V C OUT Ordering Information appears at end of data sheet. 1F 10F EN/UVLO GND MAX15062A V CC RESET C VCC 1F MODE V OUT 19-6685 Rev 2 7/16MAX15062 60V, 300mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converters Absolute Maximum Ratings V to GND .............................................................. -0.3V to 70V Continuous Power Dissipation (T = +70C) IN A EN/UVLO to GND.................................................... -0.3V to 70V 8-Pin TDFN (derate 6.2mW/NC above +70C) ...........496mW LX to GND ....................................................-0.3V to V + 0.3V Junction Tempera ture ......................................................+150C IN V , FB/V , RESET to GND ...............................-0.3V to 6V Storage Tempera ture Range ............................ -65C to +150C CC OUT MODE to GND .............................................-0.3V to V + 0.3V Soldering Temperature (reflow) .......................................+260C CC LX total RMS Current .....................................................800mA Lead Temperature (soldering, 10s) .................................+300C 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. (Note 1) Package Thermal Characteristics TDFN Junction-to-Ambient Thermal Resistance ( ) ......+162C/W JA Junction-to-Case Thermal Resistance ( ) .............+20C/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 = 0V, C = C = 1F, V = 1.5V, LX = MODE = RESET = unconnected T = -40C to +125C, unless IN GND IN VCC EN/UVLO A otherwise noted. Typical values are at T = +25C. All voltages are referenced to GND, unless otherwise noted.) (Note 2) A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS INPUT SUPPLY (VIN) Input Voltage Range V 4.5 60 V IN Input Shutdown Current I V = 0V, shutdown mode 2.2 4 A IN-SH EN/UVLO MODE = unconnected, I 95 160 A Q-PFM FB/V = 1.03 x FB/V Input Supply Current OUT OUT-REG I Normal switching mode, V = 24V 2.5 4 mA Q-PWM IN ENABLE/UVLO (EN/UVLO) V V rising 1.19 1.215 1.24 ENR EN/UVLO EN/UVLO Threshold V V falling 1.06 1.09 1.15 V ENF EN/UVLO V V falling, true shutdown 0.75 EN-TRUESD EN/UVLO EN/UVLO Input Leakage Current I V = 60V, T = +25C -100 +100 nA EN/UVLO EN/UVLO A LDO (V ) CC V Output Voltage Range V 6V < V < 60V, 0mA < I < 10mA 4.75 5 5.25 V CC CC IN VCC V Current Limit I V = 4.3V, V = 12V 13 30 50 mA CC VCC-MAX CC IN V Dropout V V = 4.5V, I = 5mA 0.15 0.3 V CC CC-DO IN VCC V V rising 4.05 4.18 4.3 CC-UVR CC V UVLO V CC V V falling 3.7 3.8 3.95 CC-UVF CC Maxim Integrated 2 www.maximintegrated.com