19-0459; Rev 1; 1/99 MAX606 Evaluation Kit ____________________________Features The MAX606 evaluation kit (EV kit) provides a regulated +5V output voltage at up to 200mA while operating from a +3V to +5V input voltage. The MAX606 operates at frequencies up to 1MHz, allowing the use of small external components. The MAX606 EV kit is a fully assembled and tested, surface-mount printed circuit board. It comes with the output voltage set to +5V, but can also be used to evaluate other output voltages between VIN and +12.5V. The MAX606 EV kit can also be used to evaluate the MAX607, which operates at 500kHz. Simply order a free sample of the MAX607EUA along with the MAX606 EV kit. ♦ +5V, +12V, or Adjustable Voltage ____________________Component List DESIGNATION QTY DESCRIPTION C1 1 2.2µF, 10V ceramic capacitor Taiyo Yuden LMK212BJ225MG-T C2 1 4.7µF, 16V ceramic capacitor Taiyo Yuden EMK316BJ475ML-T C4 1 0.01µF ceramic capacitor C5 1 0.1µF ceramic capacitor C6* 1 22µF, 16V tantalum capacitor L1 1 5µH, 1A inductor Sumida CLS62B-5R0 D1 1 Schottky diode Zetex ZHCS1000 R1 1 1MΩ, 5% resistor JU1 1 2-pin header None 1 Shunt ♦ 200mA Output Current ♦ +3V to +5V Input Voltage Range ♦ 1µA IC Shutdown Current ♦ Up to 1MHz Switching Frequency ♦ Fully Assembled and Tested Surface-Mount Board _______________Ordering Information PART TEMP. RANGE MAX606EVKIT 0°C to +70°C IC PACKAGE 8 µMAX _________________________ Quick Start The MAX606 EV kit is fully assembled and tested. Follow these steps to verify board operation. Do not turn on the power supply until all connections are completed. 1) Connect a +3V to +5V power supply to the pad marked VIN. The ground connects to the GND pad. 2) Connect a voltmeter and load (if any) to the VOUT pad. 3) Make sure that JU1 is shunted. U1 1 MAX606EUA (8-pin µMAX) None 1 MAX606 PC board C3, R2, R3 0 Not installed 4) Turn on the power and verify that the output voltage is +5V. 5) Refer to the Other Output Voltages section to modify the board for different output voltages. Evaluating the MAX607 *This capacitor is used to reduce ringing caused by lead inductance of the external power supplies. It is typically not needed in the production circuit (refer to the MAX606 data sheet for more information). ______________ Component Suppliers SUPPLIER ♦ Tiny Surface-Mount Design PHONE FAX Sumida 847-956-0666 847-956-0702 Taiyo Yuden 408-573-4150 408-573-4159 Zetex 516-543-7100 516-864-7630 To evaluate the MAX607, turn off the power to the EV kit. Replace L1 with a 10µH inductor and replace the MAX606 with a MAX607EUA. No other hardware changes are necessary. A good candidate for a 10µH inductor is a Sumida CLS62-100, which fits the same footprint as the CLS62B-5R0. Note that the CLS62-100 has a maximum current rating of 700mA, rather than 1A for the CLS62B-5R0. Note: Please indicate that you are using the MAX606 when contacting the above component suppliers. ________________________________________________________________ Maxim Integrated Products 1 For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800. For small orders, phone 1-800-835-8769. Evaluates: MAX606/MAX607 ________________ General Description Evaluates: MAX606/MAX607 MAX606 Evaluation Kit _______________Detailed Description Jumper Selection The 2-pin header JU1 selects the shutdown mode for the MAX606 and JU2 selects the output voltage. Table 1 lists jumper options. Table 1. Jumper Functions JUMPER STATE Open Closed* SHDN pin connected to VIN. MAX606 enabled, VOUT = 5V. JU1 1–2* (default trace) JU2 FUNCTION SHDN pin connected to GND through a 1MΩ resistor. MAX606 in shutdown mode, VOUT = VIN - VD. If an adjustable output voltage is desired from the circuit, cut the trace between JU2 pins 1 and 2 and add the voltage-divider resistors R2 and R3 located on the board’s solder side. Choose R2 and R3 as follows: R2 = R3(VOUT / VREF – 1) where V REF = 2V. Since the input current at FB is 200nA (max), large values (up to 100kΩ) can be used for R3 with no significant loss of accuracy. C3, also provided on the solder side, is an optional feed-forward capacitor that can reduce output voltage ripple at light loads. If this feature is desired, choose a value of C3 in the 4.7pF to 10pF range. FB pin connected to VIN. VOUT = 5V. FB pin connected to GND. VOUT = 12V. 2–3 FB pin connected to resistordivider R2 and R3, for adjustable output voltage. Open Other Output Voltages The MAX606 output voltage is pin-programmable to 5V and 12V, and also adjustable to voltages between VIN and 12.5V. The MAX606 EV kit comes with the output voltage set at 5V through a cuttable trace between JU2 pins 1 and 2. If a 12V output is desired from the MAX606 circuit, cut the trace between JU2 pins 1 and 2, install a jumper between JU2 pins 2 and 3, and change C2 to a 1µF ceramic capacitor. * Indicates default setting VIN GND 1 C6 22µF 16V 2 3 JU2 L1 5µH C1 2.2µF 10V GND D1 ZHCS1000 JU1 1 2 3 4 R1 1M PGND FB SHDN IN U1 LX MAX606 OUT SS GND 8 7 C2 4.7µF 16V C3 OPEN R2 OPEN 6 5 C4 0.01µF C5 0.1µF Figure 1. MAX606 EV Kit Schematic 2 VOUT 5V _______________________________________________________________________________________ R3 OPEN MAX606 Evaluation Kit Evaluates: MAX606/MAX607 bmg 1.0" Figure 2. MAX606 EV Kit Component Placement Guide— Component Side 1.0" Figure 3. MAX606 EV Kit Component Placement Guide— Solder Side _______________________________________________________________________________________ 3 Evaluates: MAX606/MAX607 MAX606 Evaluation Kit 1.0" 1.0" Figure 4. MAX606 EV Kit PC Board Layout—Component Side Figure 5. MAX606 EV Kit PC Board Layout—Solder Side Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 4 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.