MAX15090CEVKIT#

MAX15090B/MAX15090C Evaluation Kits General Description The MAX15090B/MAX15090C evaluation kits (EV kit) provide a proven design to evaluate the MAX15090B/ MAX15090C hot-swap controllers with an integrated 12A MOSFET. The EV kit is configured to pass 12A in a 2.7V to 18V hot-swap application, thus providing a fully integrated solution. The EV kit uses the MAX15090BEWI+/ MAX15090CEWI+ in a 3.5mm x 2mm, 28-bump, 0.5mm pitch wafer-level package (WLP) with a proven four-layer PCB design. As configured, the EV kit is optimized to operate at 12V. Ordering Information appears at end of data sheet. Evaluate: MAX15090B/MAX15090C Features ● 2.7V to 18V Operating Voltage Range ● Up to 12A Configurable Load Current Capability ● Banana Jacks for Input and Output Voltage ● Programmable Slew-Rate Control ● Selectable/Configurable Circuit-Breaker Threshold ● Configurable Overvoltage/Undervoltage Lockout ● Programmable Timeout Delay ● FAULT and PG Outputs ● Defined Safe Operation Area ● Proven PCB Layout ● Fully Assembled and Tested Component List DESIGNATION QTY C1, C2 C3 C4 C5 C6–C11 C12 C13 19-7919; Rev 0; 1/16 2 DESCRIPTION 1µF ±10%, 25V X7R ceramic capacitors (0603) Murata GRM188R71E105K TDK C1608X5R1E105M DESIGNATION QTY DESCRIPTION C14 0 Not installed, ceramic capacitor (0805) CDLY, GATE, GDRV, REG, UV, VCC 6 Red test points D1 1 18V, 600W transient voltage suppressor (SMB) Fairchild SMBJ18A D2 0 Not installed, Schottky diode (SMA) D3 0 Not installed, Schottky diode (SOD523) GND (x2), IN, OUT 4 Banana jacks JU1 1 3-pin header JU2 1 2-pin header 1 5600pF ±10%, 50V X7R ceramic capacitor (0603) Murata GRM188R71H562K TDK C1608C0G1H562J 1 0.047µF ±10%, 25V X7R ceramic capacitor (0603) Murata GRM188R71E473K TDK C1608X7R1E473K 1 0.22µF ±10%, 25V X7R ceramic capacitor (0603) Murata GRM188R71E224K TDK C1608X7R1E224K Q1 1 6 10µF ±10%, 25V X7R ceramic capacitors (1206) Murata GRM31CR71E106K TDK C3216X5R1E106M 30V, 58A, 9mΩ n-channel MOSFET (DPAK) IRF FDD8880 R1 1 178kΩ ±1% resistor (0603) R2 1 5.23kΩ ±1% resistor (0603) 0 Not installed, ceramic capacitor (1206) R3 1 17.8kΩ ±1% resistor (0603) R4 1 10Ω ±5% resistor (0603) 0 Not installed, electrolytic capacitor (D = 11mm) R5 1 40.2kΩ ±5% resistor (0603) R6 1 787Ω ±1% resistor (0603) MAX15090B/MAX15090C Evaluation Kits Evaluate: MAX15090B/MAX15090C Component List (continued) DESIGNATION QTY DESIGNATION QTY DESCRIPTION R7–R9 3 100kΩ ±5% resistors (0603) R10 1 49.9Ω ±1% resistor (0603) DESCRIPTION U2 1 General-purpose timer (8 SO) Maxim ICM7555ISA R11 1 50kΩ potentiometer — 2 Shunts R12 1 0Ω resistor (0603) — 1 PCB: MAX15090B EVALUATION KIT U1 1 12A hot-swap solution (28 WLP) Maxim MAX15090BEWI+ or Maxim MAX15090CEWI+ Component Suppliers SUPPLIER PHONE WEBSITE Fairchild Semiconductor 888-522-5372 www.fairchildsemi.com Murata Americas 770-436-1300 www.murataamericas.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX15090B/MAX15090C when contacting these component suppliers. Quick Start Required Equipment ● MAX15090B or MAX15090C EV kit ● 12V, 12A DC power supply ● Voltmeter Procedure The EV kit is fully assembled and tested. Follow the steps below to verify board operation. Caution: Do not turn on the power supply until all connections are completed. 1) Verify that a shunt is installed across pins 1-2 on jumper JU1. 2) Turn on the power supply and set the supply to 12V, then disable the power supply. 3) Connect the positive terminal of the power supply to the IN banana jack on the EV kit. Connect the negative terminal of the power supply to the GND banana jack. 4) Enable the power supply. 5) Verify that the voltage between the OUT and GND banana jacks is 12V. 6) Verify that the internal regulator voltage (REG) is 3.3V. 7) The EV kit is now ready for additional evaluation. Detailed Description of Hardware The MAX15090B EV kit provides a proven design to evaluate the MAX15090B. The MAX15090B EV kit can be conveniently connected between the system power and the load using the banana jacks provided for the input and www.maximintegrated.com output. PCB pads are provided to monitor and control the device signals. The MAX15090B EV kit operates between 2.7V and 18V up to 12A load current capability. Evaluating the MAX15090C The MAX15090C EV kit can be used to evaluate the MAX15090C, with the MAX15090CEWI+ installed. The MAX15090C is pin-to-pin compatible with the MAX15090B. Refer to the MAX15090B/MAX15090C IC data sheet for details on the MAX15090C. Circuit Breaker (CB) Jumper JU1 sets the current limit for the internal circuit breaker (CB) of the device. The CB pin can be connected to a fixed resistor (R5) or a potentiometer (R11) to set the current limit. See Table 1 for shunt positions. The circuit-breaker threshold can be set according to the following formula: ICB = RCB/3333.3 where ICB is in A and RCB (the resistor between CB and ground) is in Ω. Table 1. JU1 Jumper Selection (CB) SHUNT POSITION CB PIN CONNECTED TO CURRENT LIMIT 1-2* R5 12A R11 Adjustable 2-3 *Default position. Maxim Integrated │  2 MAX15090B/MAX15090C Evaluation Kits Evaluate: MAX15090B/MAX15090C Table 2. JU2 Jumper Selection (EN) SHUNT POSITION EN PIN TIMEOUT DELAY Installed Forced to GND Bypassed Not installed* Set low when C5 is charged to 2/3 x OUT; timing is set by R7/C5 47ms (set by C4) *Default position. Setting Timeout Delay for EN (CDLY) Capacitor C4 is used to set the timeout delay for EN to go low to prevent internal MOSFET shutdown after powerup. This is set at a rate of 1s/µF. The EV kit is configured for a 47ms timeout delay. Delayed EN The IC’s EN pin must be pulled low before the timeout delay set by capacitor C4 elapses. The EV kit provides a simple timer circuit comprised of U2, R7, and C5 to pull the EN pin low before the timeout delay. Once PG asserts as open-drain, R7 begins to charge C5 to the output voltage (OUT). When C5 charges to 2/3 x OUT, U2 pulls the EN pin low. The EV kit is configured to have EN pulled low after ~22ms. Jumper JU2 is also provided to bypass the timeout delay and force EN low, if installed. See Table 2 for JU2 settings. Setting the Output Slew Rate An external capacitor (C3) is connected from GATE to GND on the IC to reduce the output slew rate during startup. During startup, a 5.7µA (typ) current is sourced to enhance the internal MOSFET with 10V/ms (typ). C3 can be calculated according to the following formula: Undervoltage Lockout The EV kit provides an option to configure the undervoltage-lockout threshold. The undervoltage-lockout threshold for the device is configured by the IN voltage level divided by R1 and (R2 + R3) at the UV pin. By default, the undervoltage-lockout threshold is set to 10.8V. Overvoltage Lockout The EV kit provides an option to configure the overvoltage-lockout threshold. The overvoltage-lockout threshold for the device is configured by the IN voltage level divided by (R1 + R2) and R3 at the OV pin. By default, the overvoltage-lockout threshold is set to 13.2V. Current-Sense Output (ISENSE) The IC’s ISENSE pin is the output of an accurate currentsense amplifier and provides a source current proportional to the load current flowing into the main switch. The factory-trimmed current ratio is set to 220µA/A. On the EV kit, this allows producing a scaled voltage by routing resistor R6 from ISENSE to GND. C3 = (IGATE x ∆t)/∆VGATE where IGATE is 5.7µA (typ), ∆t is the desired slew rate, and ∆VGATE is the voltage at the gate of the internal MOSFET at turn-on. www.maximintegrated.com Maxim Integrated │  3 MAX15090B/MAX15090C Evaluation Kits Evaluate: MAX15090B/MAX15090C Figure 1. MAX15090B EV Kit Schematic www.maximintegrated.com Maxim Integrated │  4 MAX15090B/MAX15090C Evaluation Kits Figure 2. MAX15090B EV Kit Component Placement Guide— Component Side Evaluate: MAX15090B/MAX15090C Figure 3. MAX15090B EV Kit PCB Layout—Component Side Figure 4. MAX15090B EV Kit PCB Layout— Layer 2 (PWR/ GND) www.maximintegrated.com Maxim Integrated │  5 MAX15090B/MAX15090C Evaluation Kits Figure 5. MAX15090B EV Kit PCB Layout—Layer 3 (GND) www.maximintegrated.com Evaluate: MAX15090B/MAX15090C Figure 6. MAX15090B EV Kit PCB Layout—Solder Side Maxim Integrated │  6 MAX15090B/MAX15090C Evaluation Kits Evaluate: MAX15090B/MAX15090C Ordering Information PART TYPE MAX15090BEVKIT# EV Kit MAX15090CEVKIT# EV Kit #Denotes RoHS compliant. www.maximintegrated.com Maxim Integrated │  7 MAX15090B/MAX15090C Evaluation Kits Evaluate: MAX15090B/MAX15090C Revision History REVISION NUMBER REVISION DATE 0 1/16 PAGES CHANGED DESCRIPTION Initial release — For information on other Maxim Integrated products, visit Maxim Integrated’s website at www.maximintegrated.com. Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. © 2016 Maxim Integrated Products, Inc. │  8