MAX16962 4A, 2.2MHz, Synchronous Step-Down DC-DC Converter General Description Benefits and Features The MAX16962 is a high-efficiency, synchronous step- S Small External Components down converter that operates with a 2.7V to 5.5V input 2.2MHz Operating Frequency voltage range and provides a 0.8V to 3.6V output voltage S Ideal for Point-of-Load Applications range. The wide input/output voltage range and the abil- 4A Maximum Load Current ity to provide up to 4A to load current make this device Adjustable Output Voltage: 0.8V to 3.6V ideal for on-board point-of-load and post-regulation 2.7V to 5.5V Operating Supply Voltage applications. The MAX16962 achieves -3.7%/+2.6% out- S High Efficiency at Light Load put error over load, line, and temperature ranges. 26A Skip Mode Quiescent Current The MAX16962 features a 2.2MHz fixed-frequency PWM S Minimizes Electromagnetic Interference mode for better noise immunity and load transient Programmable SYNC I/O Pin response, and a pulse frequency modulation mode Operates Above AM-Radio Band (SKIP) for increased efficiency during light-load opera- Available Spread Spectrum tion. The 2.2MHz frequency operation allows for the use S Low Power Mode Saves Energy of all-ceramic capacitors and minimizes external compo- nents. The optional spread-spectrum frequency modula- 1A Shutdown Current tion minimizes radiated electromagnetic emissions. Open-Drain Power-Good Output Integrated low R switches improve efficiency at DSON S Limits Inrush Current During Startup heavy loads and make the layout a much simpler task Soft-Start with respect to discrete solutions. S Overtemperature and Short-Circuit Protections The MAX16962 is offered with factory-preset output S 4mm x 4mm, 16-Pin Thin QFN and 16-Pin TSSOP voltages or with an adjustable output voltage. (See the Packages Selector Guide for options). Factory preset output volt- S -40C to 125C Operating Temperature Range age versions allow customers to achieve -3.7%/+2.6% output voltage accuracy without using external resistors, Applications while the adjustable output voltage version provides the flexibility to set the output voltage to any desired value Automotive Infotainment between 0.8V to 3.6V using an external resistive divider. Point-of-Load Applications Additional features include 8ms soft-start, 16ms power- Industrial/Military good output delay, overcurrent, and overtemperature protections. The MAX16962 is available in thermally enhanced Typical Application Circuit 16-pin TSSOP-EP and 4mm x 4mm, 16-pin TQFN-EP packages, and is specified for operation over the -40NC to +125NC automotive temperature range. V PV1 PV1 OUTS 0.47H 4.7F PV2 LX1 V OUT1 Ordering Information appears at end of data sheet. EN LX2 47F PGND1 V OUT1 V PGND2 PV 10 MAX16962 PV 20k 1F GND PG EP For pricing, delivery, and ordering information, please contact Maxim Direct 19-6213 Rev 3 7/15 at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com.MAX16962 4A, 2.2MHz, Synchronous Step-Down DC-DC Converter ABSOLUTE MAXIMUM RATINGS PV, PV1, PV2 to GND ..............................................-0.3V to +6V Continuous Power Dissipation (T = +70NC) A EN, PG to GND .......................................................-0.3V to +6V TQFN (derate 25mW/NC above +70NC)................... 2000mW* PGND1 and PGND2 to GND ..............................-0.3V to +0.3V TSSOP (derate 26.1mW/NC above +70NC)........... 2088.8mW* LX1, LX2 Continuous RMS Current Operating Temperature Range ........................ -40NC to +125NC (LX1 connected in Parallel with LX2)...................................4A Junction Temperature .....................................................+150NC Storage Temperature Range ............................ -65NC to +150NC LX Current (LX1 connected in Parallel with LX2).....Q6A (Note 5) Lead Temperature (soldering, 10s) ................................+300NC All Other Pins Voltages to GND .. (V + 0.3V) to (V - 0.3V) PV GND Soldering Temperature (reflow) ......................................+260NC Output Short-Circuit Duration ....................................Continuous *As per JEDEC51 Standard (multilayer board). Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional opera- tion 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 THERMAL CHARACTERISTICS (Note 1) TQFN TSSOP Junction-to-Ambient Thermal Resistance (B ) ..........40NC/W Junction-to-Ambient Thermal Resistance (B ) ....38.3NC/W JA JA Junction-to-Case Thermal Resistance (B ) .................6NC/W Junction-to-Case Thermal Resistance (B ) ..............3NC/W JC 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 = V = V = 5V, V = 5V, T = T = -40C to +125C, unless otherwise noted. Typical values are at T = +25C.) (Note 2) PV PV1 PV2 EN A J A PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS Supply Voltage Range VPV Normal operation 2.7 5.5 V Supply Current IPV No load, VPWM = 0V 12 26 45 FA Shutdown Supply Current ISHDN VEN = 0V, TA = +25 C 1 5 FA Undervoltage Lockout Threshold VUVLO L 2.37 V Low Undervoltage Lockout Threshold VUVLO H 2.6 V High Undervoltage Lockout Hysteresis 0.07 V SYNCHRONOUS STEP-DOWN DC-DC CONVERTER FB Regulation Voltage VOUTS 800 mV ILOAD = 4A -3.7 0 +2.6 Feedback Set-Point Accuracy VOUTS % ILOAD = 0A -1.9 +2.6 VPV1 = 5V, ILX = 0.4A, pMOS On-Resistance RDSON P 34 55 mI LX1 in parallel with LX2 VPV1 = 5V, ILX = 0.8A, nMOS On-Resistance RDSON N 25 45 mI LX1 in parallel with LX2 Maxim Integrated 2