PDF MAX17017 Data sheet ( Hoja de datos )

Número de pieza	MAX17017
Descripción	Quad-Output Controller
Fabricantes	Maxim Integrated Products
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No Preview Available ! 19-4121; Rev 2; 6/09 EVAALVUAAILTAIOBNLEKIT www.DataSheet4U.com Quad-Output Controller for Low-Power Architecture General Description The MAX17017 is a quad-output controller for ultra- mobile portable computers (UMPCs) that rely on a low- power architecture. The MAX17017 provides a compact, low-cost controller capable of providing four indepen- dent regulators—a main stage, a 3AP-P internal step- down, a 5AP-P internal step-down, and a 2A source/sink linear regulator. The main regulator can be configured as either a step- down converter (for 2 to 4 Li+ cell applications) or as a step-up converter (for 1 Li+ cell applications). The inter- nal switching regulators include 5V synchronous MOSFETs that can be powered directly from a single Li+ cell or from the main 3.3V/5V power stages. Finally, the linear regulator is capable of sourcing and sinking 2A to support DDR termination requirements or to generate a fixed output voltage. The step-down converters use a peak current-mode, fixed-frequency control scheme—an easy to implement architecture that does not sacrifice fast-transient response. This architecture also supports peak current- limit protection and pulse-skipping operation to maintain high efficiency under light-load conditions. Separate enable inputs and independent open-drain power-good outputs allow flexible power sequencing. A soft-start function gradually ramps up the output volt- age to reduce the inrush current. Disabled regulators enter high-impedance states to avoid negative output voltage created by rapidly discharging the output through the low-side MOSFET. The MAX17017 also includes output undervoltage, output overvoltage, and thermal-fault protection. The MAX17017 is available in a 48-pin, 6mm x 6mm thin QFN package. Applications 1-to-4 Li+ Cell Battery-Powered Devices Low-Power Architecture Ultra-Mobile PC (UMPC) Portable Gaming Notebook and Subnotebook Computers PDAs and Mobile Communicators Features o Fixed-Frequency, Current-Mode Controllers o 5.5V to 28V Input Range (Step-Down) or 3V to 5V Input Range (Step-Up) o 1x Step-Up or Step-Down Controller o 1x Internal 5AP-P Step-Down Regulator o 1x Internal 3AP-P Step-Down Regulator o 1x 2A Source/Sink Linear Regulator with Dynamic REFIN o Internal BST Diodes o Internal 5V, 50mA Linear Regulator o Fault Protection—Undervoltage, Overvoltage, Thermal, Peak Current Limit o Independent Enable Inputs and Power-Good Outputs o Voltage-Controlled Soft-Start o High-Impedance Shutdown o 10µA (typ) Shutdown Current Ordering Information PART TEMP RANGE PIN-PACKAGE MAX17017GTM+ -40°C to +105°C 48 TQFN-EP* +Denotes a lead(Pb)-free/RoHS-compliant package. *EP = Exposed pad. Pin Configuration TOP VIEW 36 35 34 33 32 31 30 29 28 27 26 25 ONB 37 24 CSPA SYNC 38 23 CSNA ONA 39 22 AGND INBC 40 21 REF INBC 41 INBC 42 MAX17017 20 FREQ 19 UP/DN INBC 43 18 INA VDD 44 17 VCC POKD 45 16 BYP OND 46 15 LDO5 ONC 47 14 INLDO FBC 48 EXPOSED PAD = GND 13 SHDN + 1 2 3 4 5 6 7 8 9 10 11 12 THIN QFN ________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 page www.DataSheet4U.com Quad-Output Controller for Low-Power Architecture ELECTRICAL CHARACTERISTICS (continued) (Circuit of Figure 1 (step-down), VINLDO = 12V, VINA = VINBC = VDD = VCC = VBYP = VCSPA = VCSNA = 5V, VIND = 1.8V, VSHDN = VONA = VONB = VONC = VOND = 5V, IREF = ILDO5 = IOUTD = no load, FREQ = GND, UP/DN = VCC, TA = 0°C to +85°C, unless other- wise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER SYMBOL CONDITIONS REGULATOR B (Internal 3A Step-Down Converter) FBB Regulation Voltage ILXB = 0% duty cycle (Note 2) FBB Regulation Voltage (Overload) VFBB ILXB = 0 to 2.5A, 0% duty cycle (Note 2) FBB Load Regulation ΔVFBB/ΔILXB ILXB = 0 to 2.5A FBB Line Regulation 0 to 100% duty cycle FBB Input Current IFBB TA = +25°C Internal MOSFET On-Resistance High-side n-channel Low-side n-channel LXB Peak Current Limit IPKB LXB Idle-Mode Trip Level IIDLEB LXB Zero-Crossing Trip Level IZXB LXB Leakage Current ILXB ONB = GND, VLXB = GND or 5V; VINBC = 5V at TA = +25°C REGULATOR C (Internal 5A Step-Down Converter) FBC Regulation Voltage ILXC = 0A, 0% duty cycle (Note 2) FBC Regulation Voltage (Overload) VFBC ILXC = 0 to 4A, 0% duty cycle (Note 2) FBC Load Regulation FBC Line Regulation ΔVFBC/ΔILXC ILXC = 0 to 4A 0 to 100% duty cycle FBC Input Current IFBC TA = +25°C Internal MOSFET On-Resistance High-side n-channel Low-side n-channel LXC Peak Current Limit IPKC LXC Idle-Mode Trip Level LXC Zero-Crossing Trip Level IIDLEC IZXC LXC Leakage Current ILXC ONC = GND, VLXC = GND or 5V; VINBC = 5V at TA = +25°C REGULATOR D (Source/Sink Linear Regulator and VTTR Buffer) IND Input Voltage Range VIND IND Supply Current OND = VCC IND Shutdown Current OND = GND, TA = +25°C REFIND Input Range REFIND Input Bias Current VREFIND = 0 to 1.5V, TA = +25°C OUTD Output Voltage Range FBD Output Accuracy FBD Load Regulation VOUTD VFBD VFBD with respect to VREFIND, OUTD = FBD, IOUTD = +50μA (source load) VFBD with respect to VREFIND, OUTD = FBD, IOUTD = -50μA (sink load) IOUTD = ±1A TA = 0°C to +85°C MIN TYP MAX UNITS 0.747 0.720 7 -100 3.0 -20 0.755 -5 8 -5 75 40 3.45 0.8 100 0.762 0.762 10 +100 150 80 4.0 +20 V V mV/A mV nA mΩ A A mA μA 0.747 0.710 12 -100 5.0 -20 0.755 -7 14 -5 50 25 5.75 1.2 100 0.762 0.762 16 +100 100 40 6.5 +20 V V mV/A mV nA mΩ A A mA μA 1 0.5 -100 0.5 -10 0 -17 2.8 10 50 10 1.5 +100 1.5 V μA μA V nA V 0 mV +10 -13 mV/A _______________________________________________________________________________________ 5 5 Page www.DataSheet4U.com Quad-Output Controller for Low-Power Architecture (Circuit of Figure 1, TA = +25°C, unless otherwise noted.) Typical Operating Characteristics SMPS REGULATOR A EFFICIENCY vs. LOAD CURRENT 100 95 VIN = 8V 90 85 80 VIN = 20V 75 VIN = 12V 70 65 60 55 50 0.001 0.01 0.1 1 LOAD CURRENT (A) 10 SMPS REGULATOR A OUTPUT VOLTAGE vs. LOAD CURRENT 5.05 5.00 VIN = 20V 4.95 VIN = 12V 4.90 4.85 VIN = 8V 4.80 4.75 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 LOAD CURRENT (A) SMPS REGULATOR B EFFICIENCY vs. LOAD CURRENT 100 95 90 VIN = 2.5V 85 80 VIN = 3.3V 75 70 VIN = 5V 65 60 55 50 0.001 0.01 0.1 1 LOAD CURRENT (A) 10 SMPS REGULATOR B OUTPUT VOLTAGE vs. LOAD CURRENT 1.82 VIN = 5V 1.77 VIN = 2.5V VIN = 3.3V 1.72 0 0.5 1.0 1.5 2.0 2.5 3.0 LOAD CURRENT (A) SMPS REGULATOR C EFFICIENCY vs. LOAD CURRENT 90 85 VIN = 2.5V 80 75 VIN = 3.3V 70 65 VIN = 5V 60 55 50 0.001 0.01 0.1 1 LOAD CURRENT (A) 10 SMPS REGULATOR C OUTPUT VOLTAGE vs. LOAD CURRENT 1.05 1.04 1.03 1.02 VIN = 5V 1.01 1.00 VIN = 2.5V 0.99 VIN = 3.3V 0.98 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 LOAD CURRENT (A) REGULATOR D VOLTAGE vs. SOURCE/SINK LOAD CURRENT 0.930 0.925 0.920 0.915 0.910 0.905 0.900 0.895 0.890 0.885 0.880 -2.0 -1.5 -1.0 -0.5 0 0.5 1.0 1.5 2.0 LOAD CURRENT (A) ______________________________________________________________________________________ 11 11 Page

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