EVALUATION KIT AVAILABLE MAX15003 Triple-Output Buck Controller with Tracking/Sequencing General Description Features The MAX15003 is a triple-output, pulse-width-modulat- 5.5V to 23V or 5V 10% Input Voltage Range ed (PWM), step-down DC-DC controller with tracking Triple-Output Synchronous Buck Controller and sequencing capability. The device operates over the input voltage range of 5.5V to 23V or 5V 10%. Selectable In-Phase or 120 Out-of-Phase Each PWM controller provides an adjustable output Operation down to 0.6V and delivers up to 15A for each output with excellent load and line regulation. The MAX15003 Output Voltages Adjustable from 0.6V to 0.85V IN is optimized for high-performance, small-size power management solutions. Lossless Valley-Mode Current Sensing or Accurate Valley Current Sensing Using R The options of coincident tracking, ratiometric tracking, SENSE and output sequencing allow the tailoring of the power- External Compensation for Maximum Flexibility up/power-down sequence depending on the system requirements. Each of the MAX15003 PWM sections uti- Digital Soft-Start and Soft-Stop lizes a voltage-mode control scheme with external com- Sequencing or Coincident/Ratiometric V OUT pensation allowing for good noise immunity and maximum flexibility with a wide selection of inductor val- Tracking ues and capacitor types. Each PWM section operates Individual PGOOD Outputs at the same, fixed switching frequency that is program- mable from 200kHz to 2.2MHz and can be synchro- RESET Output with a Programmable Timeout nized to an external clock signal using the SYNC input. Period Each converter operating at up to 2.2MHz with 120 out-of-phase, increases the input capacitor ripple fre- 200kHz to 2.2MHz Programmable Switching quency up to 6.6MHz, thereby reducing the RMS input Frequency ripple current and the size of the input bypass capaci- tor requirement significantly. External Frequency Synchronization The MAX15003 includes internal input undervoltage Hiccup Mode Short-Circuit Protection lockout with hysteresis, digital soft-start/soft-stop for Space-Saving (7mm x 7mm) 48-Pin TQFN glitch-free power-up and power-down of each convert- er. The power-on reset (RESET) with an adjustable Package timeout period monitors all three outputs and provides a RESET signal to the processor when all outputs are within regulation. Protection features include lossless valley-mode current limit and hiccup mode output Ordering Information short-circuit protection. PART TEMP RANGE PIN-PACKAGE The MAX15003 is available in a space-saving, 7mm x 48 TQFN-EP* 7mm, 48-pin TQFN-EP package and is specified for MAX15003ATM+ -40C to +125C (7mm x 7mm) operation over the -40C to +125C automotive temper- ature range. See the MAX15002 data sheet for a dual +Denotes a lead(Pb)-free/RoHS-compliant package. version of the MAX15003. *EP = Exposed pad. Note: Devices are also available in a tape-and-reel packaging. Applications Specify tape and reel by adding T to the part number when ordering. Tape-and-reel orders are available in 2.5k incre- PCI Express Host Bus Adapter Power Supplies ments. Networking/Server Power Supplies Point-of-Load DC-DC Converters Pin Configuration appears at end of data sheet. PCI Express is a registered trademark of PCI-SIG Corporation. For pricing, delivery, and ordering information, please contact Maxim Direct 19-1048 Rev 1 8/12 at 1-888-629-4642, or visit Maxims website at www.maximintegrated.com.MAX15003 Triple-Output Buck Controller with Tracking/Sequencing ABSOLUTE MAXIMUM RATINGS IN, LX , CSN to SGND..........................................-0.3V to +30V PGND to SGND, PGND to Any Other PGND .......-0.3V to +0.3V BST to SGND........................................................-0.3V to +30V Continuous Power Dissipation (T = +70C) A BST to LX ..............................................................-0.3V to +6V 48-Pin TQFN (derate 38.5mW/C above +70C) .......3076.9mW* REG, DREG , SYNC, EN , RT, CT, Operating Junction Temperature Range...........-40C to +125C RESET, PHASE, SEL to SGND ...............................-0.3V to +6V Junction Temperature......................................................+150C ILIM , PGOOD , FB , COMP , CSP to SGND .......-0.3V to +6V Storage Temperature Range .............................-60C to +150C DL to PGND .......................................-0.3V to (V + 0.3V) Lead Temperature (soldering, 10s) .................................+300C DREG DH to LX ...............................................-0.3V to (V + 0.3V) Soldering Temperature (reflow) .......................................+260C BST *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 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 THERMAL CHARACTERISTICS (Note 1) 48 TQFN Junction-to-Ambient Thermal Resistance ( )...............26C/W JA Junction-to-Case Thermal Resistance ( )......................1.3C/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 = 5.5V to 23V or V = V = 4.5V to 5.5V, V = V , V = V = V = V = 0V, C = 2.2F, R = IN IN REG DREG REG PGND SYNC PHASE SEL REG RT 100k, C = 0.1F, R = 60k, T = T = -40C to +125C, unless otherwise noted. Typical values are at V = 12V and T = T CT ILIM A J IN A J = +25C, unless otherwise noted.) (Note 1) PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS SYSTEM SPECIFICATIONS 5.5 23.0 V Input Voltage Range V IN V = V = V (Note 2) 4.5 5.5 V IN REG DREG Input Undervoltage Lockout V V rising 3.95 4.05 4.15 V UVLO IN Threshold Input Undervoltage Lockout 0.35 V Hysteresis Operating Supply Current V = 12V, V = 0.8V, no switching 5 8 mA IN FB Shutdown Supply Current V = 12V, EN = 0V, PGOOD unconnected 150 300 A IN REG VOLTAGE REGULATOR Output-Voltage Setpoint V V = 5.5V to 23V 4.9 5.2 V REG IN Load Regulation I = 0 to 120mA, V = 12V 0.2 V REG IN DIGITAL SOFT-START/SOFT-STOP Soft-Start/Soft-Stop Duration 2048 Clocks Reference Voltage Steps 64 Steps ERROR TRANSCONDUCTANCE AMPLIFIER FB , TRACK Input Bias Current -250 +250 nA T = T = 0C to +85C 0.5945 0.6 0.6065 V A J FB Voltage Setpoint V FB T = T = -40C to +125C 0.590 0.6 0.608 V A J Maxim Integrated 2