19-5750 Rev 0 1/11 MAX5977A Evaluation Kit Evaluates: MAX5977A/MAX5977B General Description Features The MAX5977A EV kit is a hot-swap controller circuit S 1V to 16V Input Range board providing a controlled turn-on for high-power, S Demonstrates Latched-Fault Output high-capacitance loads, thus preventing glitches on the S Configurable Input Undervoltage (9V) and power-supply rail. The circuit uses a latching MAX5977A Overvoltage (15V) Thresholds hot-swap controller IC in a 20-pin TQFN surface-mount package with an exposed pad. The EV kit operates from S Output Current Up to 40A a 1V to 16V input source range connected at the VIN and S Configurable Slow and Fast Current-Limit GND connectors. Thresholds The IC controls two n-channel MOSFETs that deliver up S Precision Current Monitoring to 40A of output current. The EV kit circuit ensures that S Calibration Mode the output voltage is stable and within the undervoltage S Selectable Digital Voltage Supply (VIO) (UV) and overvoltage (OV) thresholds. The circuit con- tinually monitors load current to ensure that it does not S FAULT and Power-Good LED Indicators exceed the circuit programmable fast and slow current- S Buffered Current-Sense Amplifier Output Drives limit thresholds. The EV kit circuit provides a buffered External Circuitry output of the ICs current-sense amplifier and includes S Evaluates MAX5977A Latched-Off Version a precision current source providing a 2.5V output when enabling the ICs calibration-mode function. S Evaluates MAX5977B Autoretry Version After IC Replacement The EV kit can also be used to evaluate the MAX5977B autoretry hot-swap controller after IC replacement of U1. S Surface-Mount Components S Proven PCB Layout S Fully Assembled and Tested Ordering Information appears at end of data sheet. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 1000pF Q5%, 50V X5R ceramic 2.5V CAL, C3 1 capacitor (0603) CALSENSE, Murata GRM1885C1H102J FAULT, FCOMP, 1FF Q10%, 25V X5R ceramic GATE, IN, 15 Small red test points C4, C5, C10 3 capacitors (0603) OV, PG, PWR, Murata GRM188R61E105K REG, SCOMP, SENSE, TP1, 10FF Q10%, 25V X5R ceramic TP3, UV C6, C7 2 capacitors (1206) Murata GRM31CR61E106K 0.1FF Q10%, 50V X5R ceramic 10FF Q10%, 6.3V X5R ceramic C1, C8, C9, 6 capacitors (0603) C11 1 capacitor (0805) C13, C14, C16 Murata GRM188R61H104K Murata GRM21BR60J106K Not installed, ceramic capacitors Not installed, ceramic capacitor C2, C15 0 C12 0 (0603) (0805) Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxims website at www.maxim-ic.com.MAX5977A Evaluation Kit Evaluates: MAX5977A/MAX5977B Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION R7 1 825I Q1% resistor (0603) 5A, 40V Schottky rectifier (SMC) D1 1 Diodes Inc. B540C 0.5mI Q1%, 3W sense resistor R8 1 (3921) 3.9V zener diode (PowerDI 323) D2 1 Vishay/Dale WSL3921L5000FEA Diodes Inc. PD3Z284C3V9-7 R9, R13 2 20.0kI Q1% resistors (0603) 20V, 600W unidirectional TVS R10 1 49.9I Q1% resistor (0603) (SMB) D3 1 Diodes Inc. SMBJ18A R11 1 4.12kI Q1% resistor (0603) (Top Mark: LT) R12 1 4.99kI Q1% resistor (0603) D4 1 Red LED (1206) R15, R21, R22 3 100kI Q5% resistors (0603) D5 1 Green LED (1206) R16 1 7.15kI Q1% resistor (0603) R17, R18 2 1I Q5% resistors (0603) GND (x2), VIN, 4 Screw terminals VOUT R19 1 10I Q5% resistor (0603) JU1, JU3 2 3-pin headers R20 1 1kI Q1% resistor (0603) JU2 1 2-pin header R23 1 0I Q5% resistor (0603) SW1, SW2 2 3-position, top-slide DIP switches 25V, 100A n-channel MOSFETs N1, N2 2 (LFPAK) TP2, TP4TP7 5 Small black test points NXP Semi PSMN1R2-25YL Hot-swap controller U1 1 (20 TQFN-EP) Single n-channel logic-level Maxim MAX5977AETP+ N3 1 MOSFET (SOT23) Central Semi 2N7002 2.5V voltage reference (6 SOT23) U2 1 Maxim MAX6033AAUT25 G16 Single p-channel logic-level (Top Mark: ABDF) P1 1 MOSFET (SOT23) Fairchild Semi NDS0605 High-precision op amp (6 SOT23) npn transistor (SOT523) U3 1 Maxim MAX4236EUT+ Fairchild MMBT2222ATCT (Top Mark: AAUV) Q1 1 (Top Mark: A02), or Diodes Inc. MMBT22AT-7-F 3.3V 50mA linear regulator (Top Mark: IP ) U4 1 (8 SO-EP) Maxim MAX15006AASA+ R1, R2 2 249I Q5% resistors (0805) R3, R4, R24 0 Not installed, resistors (0603) 3 Shunts (JU1, JU2, JU3) R5, R14 2 100kI Q1% resistors (0603) PCB: MAX5977A EVALUATION 1 KIT R6 1 453I Q1% resistor (0603) PowerDI is a trademark of Diodes Incorporated. Maxim Integrated Products 2