19-2815; Rev 0; 4/03 MAX8530/MAX8531 Evaluation Kit Features ♦ Dual-Output Power Supply MAX8530: 2.85V at 200mA, 2.60V at 150mA MAX8531: 2.85V at 200mA, 2.85V at 150mA ♦ 2.5V to 6.5V Input Supply Range ♦ Selectable (140ms) RESET Output (MAX8530) ♦ Low-Noise (40µVRMS) Outputs (MAX8531) ♦ On-Board Shutdown Control ♦ Surface-Mount Construction ♦ Fully Assembled and Tested Ordering Information Component List DESIGNATION QTY DESCRIPTION A1 1 MAX8530ETT 6-pin QFN (Note 1) C1, C4 2 2.2µF ±20%, 10V X5R ceramic capacitors (0805) TDK C2012X5R1A225M (Note 2) 2 2.2µF ±20%, 6.3V X5R ceramic capacitors (0603) TDK 1608X5R0J225M C2, C5 C3, C6 2 1.0µF ±20%, 10V X5R ceramic capacitors (0603) TDK C1608X5R1A105M C7 1 0.01µF ±20%, 25V X7R ceramic capacitor (0402) TDK C1005X7R1E103M JU1, JU2, JU3 3 Jumpers, 3-pin headers R1 1 100kΩ ±5% resistor (0402) U1 1 MAX8530EBTJO (2 x 3 UCSP) U2 1 MAX8531EBTJJ (2 x 3 UCSP) None 3 Shunts None 1 MAX8530/MAX8531 EV kit PC board Note 1: A1 is for display purposes only (not a functional component). Note 2: If the input voltage is less than 6.3V, capacitors C1 and C4 can be reduced in size. PART TEMP RANGE MAX8530/MAX8531EVKIT 0°C to +70°C IC PACKAGE 2 x 3 UCSP Quick Start Recommended Equipment • One variable-DC power supply capable of supplying up to 6.5V at 0.5A • Three voltmeters Procedure (MAX8530) The MAX8530/MAX8531 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: 1) Set the variable-DC power supply to 3.6V. 2) Ensure the variable-DC power supply is turned off. 3) Ensure shunts are placed across pins 1 and 2 of jumpers JU1 and JU2. 4) Connect the power supply to the IN pad and the corresponding GND pad. 5) Connect a voltmeter across the OUT1 pad and the corresponding GND pad. 6) Connect a voltmeter across the OUT2 pad and the corresponding GND pad. 7) Connect a voltmeter across the RESET pad and the GND pad (located beside the IN pad). ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 Evaluate: MAX8530/MAX8531 General Description The MAX8530/MAX8531 evaluation kit (EV kit) is a fully assembled and tested surface-mount circuit board that contains two separate low-dropout (LDO) regulator circuits. The left circuit utilizes a MAX8530 and is configured for outputs of 2.85V at 200mA and 2.60V at 150mA. The right circuit uses a low-noise MAX8531 and is configured for outputs of 2.85V at 200mA and 2.85V at 150mA. The MAX8530/MAX8531 EV kit features on-board shutdown control and a jumper-selectable RESET output voltage (MAX8530 only). Both circuits are separate from each other and do not share a common ground plane. Evaluate: MAX8530/MAX8531 MAX8530/MAX8531 Evaluation Kit Component Suppliers SUPPLIER TDK PHONE FAX 847-803-6100 847-390-4405 WEBSITE www.component.tdk.com Note: Please indicate that you are using the MAX8530 or MAX8531 when contacting this component supplier. 8) Turn on the variable-DC power supply. 9) Verify the voltage at OUT1 is 2.85V. 10) Verify the voltage at OUT2 is 2.60V. 11) Verify the voltage at RESET is 2.85V. Procedure (MAX8531) The MAX8530/MAX8531 EV kit is fully assembled and tested. Follow the steps below to verify board operation. Do not turn on the power supply until all connections are completed: 1) Set the variable-DC power supply to 3.6V. 2) Ensure the variable-DC power supply is turned off. 3) Ensure a shunt is placed across pins 1 and 2 of jumper JU3. 4) Connect the power supply to the IN2 pad and the corresponding GND2 pad. 5) Connect a voltmeter across the OUT21 pad and the corresponding GND2 pad. 6) Connect a voltmeter across the OUT22 pad and the corresponding GND2 pad. 7) Turn on the variable-DC power supply. Detailed Description The MAX8530/MAX8531 EV kit contains two separate low-dropout (LDO) regulator circuits. Either circuit can be powered from a DC power supply with a 2.5V to 6.5V input range. The left circuit (MAX8530) provides two fixed output voltages (2.85V and 2.60V) at 200mA and 150mA. A MAX8530 in a 6-pin UCSP package is used for this circuit. PC board pads for the SHDN signal and the RESET signal are provided on the circuit to interface with an external controller. The right circuit (MAX8531) provides two fixed output voltages (2.85V and 2.85V) at 200mA and 150mA. A low-noise MAX8531 in a 6-pin UCSP™ package is used for this circuit. PC board pads for the SHDN signal are provided on the circuit to interface with an external controller. The MAX8530/MAX8531 EV kit provides on-board shutdown control as well as a jumper-selectable RESET output voltage for the MAX8530. The left and right circuits are separate from each other and do not share a common ground plane. Shutdown Control 8) Verify the voltage at OUT21 is 2.85V. The MAX8530/MAX8531 has an active-low shutdown control input that enables/disables both of the power outputs. JU1 (MAX8530) or JU3 (MAX8531) selects the circuit operating modes: shutdown or normal operation. When driving SHDN with an external signal, remove the shunt and connect a signal source to the SHDN pad (MAX8530) or the SHDN2 pad (MAX8531). See Table 1 for shunt positions. 9) Verify the voltage at OUT22 is 2.85V. Table 1. Shutdown Selection JUMPER SHUNT POSITION SHDN PIN JU1/JU3 1 and 2* Connected to IN MAX8530/MAX8531 Outputs Enabled. RESET is high impedance when all outputs are in regulation (MAX8530). JU1/JU3 2 and 3 Connected to GND MAX8530/MAX8531 Outputs Disabled. RESET is low impedance (MAX8530). DESCRIPTION *Default configuration: JU1/JU3 (1 and 2). UCSP is a trademark of Maxim Integrated Products, Inc. 2 _______________________________________________________________________________________ MAX8530/MAX8531 Evaluation Kit Table 2. RESET Output Selection The RESET pin of the MAX8530 indicates the status of the voltage at OUT1 only. Monitor this voltage at the RESET pad. The RESET pin is pulled up with a 100kΩ resistor through jumper JU2 to one of two outputs (see Table 2 for shunt positions). There is also a version that has an internal 100kΩ pullup to OUT1. Contact factory for availability. IN B2 JUMPER SHUNT POSITION DESCRIPTION JU2 1 and 2* RESET pin pulled up to OUT1 (2.85V) JU2 2 and 3 RESET pin pulled up to OUT2 (2.60V) *Default configuration: JU2 (1–2). IN OUT1 C1 2.2µF C2 2.2µF GND OUT2 1 2 3 GND OUT2 B3 C3 1µF U1 SHDN OUT1 B1 GND MAX8530 JU1 A2 3 2 1 SHDN JU2 R1 100kΩ GND RESET A3 RESET A1 IN2 B2 OUT1 IN C4 2.2µF C5 2.2µF GND2 OUT2 1 2 3 GND2 OUT22 B3 C6 1µF U2 SHDN2 OUT21 B1 GND2 MAX8531 JU3 A2 SHDN GND A1 BP A3 C7 0.01µF Figure 1. MAX8530/MAX8531 EV Kit Schematic _______________________________________________________________________________________ 3 Evaluate: MAX8530/MAX8531 Selecting the RESET Output Voltage (MAX8530) Evaluate: MAX8530/MAX8531 MAX8530/MAX8531 Evaluation Kit Figure 2. MAX8530/MAX8531 EV Kit Component Placement Guide—Component Side Figure 3. MAX8530/MAX8531 EV Kit PC Board Layout— Component Side Figure 4. MAX8530/MAX8531 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 © 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.