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19-0459; Rev 1; 1/99
MAX606 Evaluation Kit
________________ General Description
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.
____________________________Features
o +5V, +12V, or Adjustable Voltage o Tiny Surface-Mount Design o 200mA Output Current o +3V to +5V Input Voltage Range o 1A IC Shutdown Current o Up to 1MHz Switching Frequency o Fully Assembled and Tested Surface-Mount Board
Evaluates: MAX606/MAX607
____________________Component List
DESIGNATION QTY C1 C2 C4 C5 C6* L1 D1 R1 JU1 None U1 None C3, R2, R3 1 1 1 1 1 1 1 1 1 1 1 1 0 DESCRIPTION 2.2F, 10V ceramic capacitor Taiyo Yuden LMK212BJ225MG-T 4.7F, 16V ceramic capacitor Taiyo Yuden EMK316BJ475ML-T 0.01F ceramic capacitor 0.1F ceramic capacitor 22F, 16V tantalum capacitor 5H, 1A inductor Sumida CLS62B-5R0 Schottky diode Zetex ZHCS1000 1M, 5% resistor 2-pin header Shunt MAX606EUA (8-pin MAX) MAX606 PC board Not installed
_______________Ordering Information
PART MAX606EVKIT TEMP. RANGE 0C to +70C IC PACKAGE 8 MAX
_________________________ 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. 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
To evaluate the MAX607, turn off the power to the EV kit. Replace L1 with a 10H inductor and replace the MAX606 with a MAX607EUA. No other hardware changes are necessary. A good candidate for a 10H 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.
*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 Sumida Taiyo Yuden Zetex PHONE 847-956-0666 408-573-4150 516-543-7100 FAX 847-956-0702 408-573-4159 516-864-7630
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.
MAX606 Evaluation Kit Evaluates: MAX606/MAX607
_______________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.
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 1F ceramic capacitor. 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 100k) 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.
Table 1. Jumper Functions
JUMPER STATE FUNCTION SHDN pin connected to GND through a 1M resistor. MAX606 in shutdown mode, VOUT = VIN - VD. SHDN pin connected to VIN. MAX606 enabled, VOUT = 5V. FB pin connected to VIN. VOUT = 5V. FB pin connected to GND. VOUT = 12V. FB pin connected to resistordivider R2 and R3, for adjustable output voltage.
Open JU1 Closed* 1-2* (default trace) JU2 2-3
Open
* Indicates default setting
VIN C6 22F 16V 1 2 3 JU2 C1 2.2F 10V D1 ZHCS1000 1 PGND L1 5H
GND
GND
JU1
U1
LX
8 VOUT 5V R2 OPEN
2
FB
MAX606 OUT
7
C2 4.7F 16V
C3 OPEN
3
SHDN
SS
6 C4 0.01F
R1 1M C5 0.1F
4
IN
GND
5
R3 OPEN
Figure 1. MAX606 EV Kit Schematic
2 _______________________________________________________________________________________
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
MAX606 Evaluation Kit Evaluates: MAX606/MAX607
1.0"
Figure 4. MAX606 EV Kit PC Board Layout--Component Side
1.0"
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 (c) 1999 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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