Evaluates: MAX15038/MAX15039 19-4389 Rev 1 5/10 MAX15038 Evaluation Kit General Description Features Evaluates Internal 31m R High-Side and The MAX15038 evaluation kit (EV kit) demonstrates the DSON 24m R Low-Side MOSFETs DSON MAX15038 4A, 2MHz step-down regulator with integrated switches for enterprise-server, telecommunication, com- 4A Output puting, and networking power-supply applications. The 1% Output Accuracy Over Load, Line, and EV kit is preset for a 1.8V output voltage at load currents Temperature up to 4A from a 2.9V to 5.5V input-voltage range. A 1MHz Operates from 2.9V to 5.5V Input Supply switching frequency and up to 95% efficiency (with the All-Ceramic Capacitor Design supplied components) is achieved by the EV kit. 9 Selectable Output Voltages from 0.6V to 2.5V The EV kit can also be used to evaluate the MAX15039 Programmable Output Voltages from 0.6V to step-down regulator. (0.9 x V ) through a Resistor-Divider IN 500kHz to 2MHz Adjustable Frequency Programmable Soft-Start Time REFIN for DDR Termination and Tracking Ordering Information Applications PART TYPE Proven PCB Layout MAX15038EVKIT+ EV Kit Fully Assembled and Tested +Denotes lead(Pb)-free and RoHS compliant. Component List DESIGNATION QTY DESCRIPTION DESIGNATION QTY DESCRIPTION 22F 10%, 6.3V X5R ceramic C14 0 N ot ins tal l ed, ce ram i c capac i tor ( 0805) C1, C2 2 capacitors (0805) 1000pF 10%, 50V X7R ceramic TDK C2012X5R0J226K C15 1 capacitor (0603) 0.1F 10%, 25V X7R ceramic TDK C1608X7R1H102K C3, C9 2 capacitors (0603) IN, OUT, PGND 3 Non ins ul ated b anana ja ck connector s TDK C1608X7R1E104K JU1, JU2 2 2-pin headers 0.01F 10%, 50V X7R ceramic JU3, JU4, JU5 3 3-pin headers C4, C6 2 capacitors (0603) 0.47H, 8.3m , 9.0A inductor TDK C1608X7R1H103K L1 1 (7.7mm x 7mm) 2.2F 10%, 16V X5R ceramic TOKO FDV0620-R47 C5 1 capacitor (0603) R1 1 2.2 5% resistor (0603) Murata GRM188R61C225K R2 1 10k 5% resistor (0603) Not installed, ceramic capacitors C7, C13 0 R3 1 1k 5% resistor (0603) (0603) R4 1 2.67k 1% resistor (0603) 0.022F 10%, 50V X7R ceramic C8 1 capacitor (0603) R5 1 20k 5% resistor (0603) TDK C1608X7R1H223K R6 1 158 1% resistor (0603) 560pF 10%, 50V X7R ceramic R7 1 49.9k 1% resistor (0603) C10 1 capacitor (0603) R8, R9 0 Not installed, resistors (0603) TDK C1608X7R1H561K 2MHz buck controller (24 TQFN-EP*) 1500pF 10%, 50V X7R ceramic U1 1 Maxim MAX15038ETG+ C11 1 capacitor (0603) TDK C1608X7R1H152K 5 Shunts (JU1JU5) 33pF 5%, 50V C0G ceramic 1 PCB: MAX15038 EVALUATION KIT+ C12 1 capacitor (0603) *EP = Exposed pad. TDK C1608C0G1H330CT 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.MAX15038 Evaluation Kit Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com TOKO America, Inc. 847-297-0070 www.tokoam.com Note: Indicate that you are using the MAX15038 or MAX15039 when contacting these component suppliers. 9) Remove the shunt from jumper JU1 (MAX15038 Quick Start enabled). Required Equipment 10) Verify that the DMM measures 1.8V. MAX15038 EV kit Detailed Description of Hardware 2.9V to 5.5V, 4A DC power supply The MAX15038 EV kit demonstrates the MAX15038 4A, One digital multimeter (DMM) 2MHz step-down regulator with integrated switches in a One load up to 4A 24-pin TQFN surface-mount package with an exposed pad. Applications include enterprise-server, telecom- Procedure munication, computing, and networking power supplies. The MAX15038 EV kit is fully assembled and tested. Follow the steps below to verify board operation. The EV kit generates selectable output voltages from Caution: Do not turn on the power supply until all 0.6V to 2.5V at load currents up to 4A. The output volt- connections are competed. age should be configured only BEFORE power-up using jumpers JU3 (CTL1) and JU4 (CTL2). Once the IC is 1) Preset the DC power supply to 5V and disable the enabled using jumper JU1 (EN), jumpers JU3 and JU4 power-supply output. should not be changed until power cycling or disabling 2) Set the load to 4A or less and disable the load. the IC. The EV kit can also program the output voltage 3) Verify that shunts are installed on the EV kit jumpers from 0.6V to (0.9 x V ) through resistor-dividers R8 and IN as follows: R9. Jumper JU2 (REFIN) configures the EV kit reference voltage as an internal 0.6V reference or a user-supplied JU1: Installed (MAX15038 disabled) 0V to (VDD - 2V) voltage reference connected across JU2: Installed (internal 0.6V reference) the REF IN and GND PCB pads. V = 1.8V: OUT The EV kit operates in three different functional modes JU3: Not installed (forced PWM, monotonic startup, and skip), as config- ured by jumper JU5 (MODE). The EV kit shows a 1MHz JU4: Pins 1-2 switching frequency and up to 95% efficiency with the JU5: Pins 2-3 (forced-PWM mode) supplied components. The EV kit can evaluate other switching frequencies between 500kHz and 2MHz. See 4) Connect the power-supply positive terminal to the the Evaluating Other Switching Frequencies (FREQ) IN banana jack and the negative terminal to the section for more information. The EV kit also provides a nearby PGND banana jack. PWRGD PCB pad to access the ICs power-good logic 5) Connect the load positive terminal to the OUT output. The EV kit operates from a 2.9V to 5.5V input banana jack and the negative terminal to the DC power supply connected across the IN and PGND PGND banana jack. banana jacks. 6) Set the DMM to measure voltage. Connect the The EV kit can also be used to evaluate the MAX15039 positive terminal to the OUT PCB pad and the neg- step-down regulator. See the Evaluating the MAX15039 ative terminal to the nearby PGND PCB pad. IC section for more information. 7) Enable the power supply. Regulator Enable (EN) 8) Enable the load. The MAX15038 features a shutdown mode to minimize the IC quiescent current. To shut down the IC, install a shunt on jumper JU1. For normal operation, remove the shunt from JU1. See Table 1 to configure jumper JU1. 2 Evaluates: MAX15038/MAX15039