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19-3553; Rev 0; 1/05
MAX8564 Evaluation Kit
General Description
The MAX8564 evaluation kit (EV kit) is a fully assembled and tested circuit board that evaluates the MAX8564 dual linear n-FET controller. The MAX8564 circuit generates a 1.5V output voltage at load currents up to 1.5A from a 1.8V input voltage and a 1.05V output voltage at load currents up to 3A from a 1.2V input voltage. The VDD bias supply permits operation from 5V or 12V rails. The MAX8564 EV kit can also evaluate the MAX8563. To evaluate the MAX8563, order a free sample with this EV kit. MAX8563: 3 Outputs MAX8564: 2 Outputs 1% Feedback Regulation Adjustable Output Voltage Down to 0.5V Wide Supply Voltage Range Permits Operation from 5V and 12V Rails Individual Enable Control and POK Signals Allow Sequencing Undervoltage Short-Circuit Protection Drives n-Channel MOSFETs Fully Assembled and Tested
Features
Evaluates: MAX8563/MAX8564
Ordering Information
PART MAX8564EVKIT TEMP RANGE 0C to +70C IC PACKAGE 10 MAX(R)
Component List
DESIGNATION QTY DESCRIPTION MAX8564 Circuit C17 1 0.1F 10%, 16V X7R ceramic capacitor (0603) TDK C1608X7R1C104K 2.2F 10%, 6.3V X5R ceramic capacitors (0603) TDK C1608X5R0J225K 100F, 18m, 6.3V aluminum electrolytic Sanyo 6TPE100MI 1F 10%, 16V X5R ceramic capacitors (0603) TDK C1608X5R1C105K Not installed (0402) 3-pin headers Dual n-channel MOSFET, 30V, 18m (max), SO-8 Vishay Si4922DY 620 5%, resistor (0603) 332 1%, resistor (0603) 665 1%, resistor (0603) 390 5%, resistor (0603) 182 1%, resistor (0603) 165 1%, resistor (0603) MAX8564EUB Shunts, position 2 MAX8564 EV kit PC board DESIGNATION QTY DESCRIPTION MAX8563 Circuit (Not Installed) 0.1F 10%, 16V X7R ceramic C1 0 capacitor (0603) TDK C1608X7R1C104K 2.2F 10%, 6.3V X5R ceramic C2, C6, C10 0 capacitors (0603) TDK C1608X5R0J225K 100F, 18m, 6.3V aluminum C3, C4, C7, 0 electrolytic C8, C11, C12 Sanyo 6TPE100MI 1F 10%, 16V, X5R ceramic C5, C9, C13 0 capacitors (0603) TDK C1608X5R1C105K C14, C15, C16 0 Not installed (0402) JU1, JU2, JU3 N1 0 0 3-pin headers Dual n-channel MOSFET, 30V, 18m (max), SO-8 Vishay Si4922DY n-channel MOSFET, 30V, 50m (max), DPAK Fairchild Semiconductor FDD6630A 665 1% resistor (0603) 620 5% resistor (0603) 332 1% resistor (0603) 390 5% resistor (0603) 182 1% resistor (0603) 165 1% resistor (0603) 910 5% resistor (0603) 1k 1% resistor (0603) 249 1% resistor (0603) MAX8563EEE Shunt, position 2
C18, C21 C19, C20 C22, C23 C24, C25 C26, C27 JU4, JU5 N3 R10 R11 R12 R13 R14 R15 U2 None None
2
4
2 0 2 1 1 1 1 1 1 1 1 2 1
N2 R1 R2 R3 R4 R5 R6 R7 R8 R9 U1 None
0 0 0 0 0 0 0 0 0 0 0 0
MAX is a registered trademark of Maxim Integrated Products, Inc.
________________________________________________________________ Maxim Integrated Products
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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.
MAX8564 Evaluation Kit Evaluates: MAX8563/MAX8564
Component Suppliers
SUPPLIER Fairchild Semiconductor Sanyo TDK Vishay PHONE 972-910-8000 619-661-6835 888-835-6646 402-563-6866 WEBSITE www.fairchildsemi.com www.sanyo.com www.component.tdk.com www.vishay.com
6) Connect the positive lead of PS3 to the VDD2 pad on the EV kit and connect the negative lead of PS3 to the GND2 pad on the EV kit. 7) Connect the positive lead of one DMM to the OUT12 pad on the EV kit and connect the negative lead of that DMM to the GND2 pad on the EV kit. 8) Connect the positive lead of the second DMM to the OUT22 pad on the EV kit and connect the negative lead of that DMM to the GND2 pad on the EV kit. 9) Turn on PS1 and PS2. 10) Turn on PS3. 11) Verify the voltage at OUT12 is 1.5V 2%. 12) Verify the voltage at OUT22 is 1.05V 2%. 13) Connect a 1.5A load between OUT12 and GND. 14) Verify that the voltage at OUT12 is 1.5V 2%. 15) Connect a 3A load between OUT22 and GND. 16) Verify that the voltage at OUT22 is 1.05V 2%.
Note: Indicate you are using the MAX8564 EV kit when contacting these suppliers.
Quick Start
Recommended Equipment
* Two variable-DC power supplies capable of supplying up to 2V at 4A * One DC power supply capable of supplying 5V or 12V at 100mA * Two digital multimeters (DMM) * 1.5A load * 3A load * Ammeter (optional)
Detailed Description
Evaluating Other Output Voltages
The minimum output voltage for each controller of the MAX8563/MAX8564 is 0.5V. The maximum output voltage is adjustable up to 3.3V with VDD = 12V, and up to 1.8V with V DD = 5V. To set the output voltage for OUT12, connect the FB1 pin to the center of a voltagedivider between OUT12 and GND (R11 and R12 in Figure 1). The resistor-divider current should be at least 1mA per 1A of maximum output current. R11 500 IOUT12(MAX)
Procedure
The MAX8564 EV kit is fully assembled and tested. Follow the steps below to verify board operation: 1) Preset a variable-DC power supply (further referred to as PS1) to 1.8V. Turn off the power supply. Do not turn on the power supply until all connections are complete. 2) Preset a variable-DC power supply (further referred to as PS2) to 1.2V. Turn off the power supply. Do not turn on the power supply until all connections are complete. 3) Preset the DC power supply (further referred to as PS3) to 5V or 12V. Turn off the power supply. Do not turn on the power supply until all connections are complete. 4) Connect the positive lead of PS1 to the IN12 pad on the EV kit and connect the negative lead of PS1 to the GND2 pad on the EV kit. 5) Connect the positive lead of PS2 to the IN22 pad on the EV kit and connect the negative lead of PS2 to the GND2 pad on the EV kit.
R12 = R11 x (2 x VOUT12 - 1) For OUT22, R14 and R15 are calculated using the same method. To set the output voltage to 0.5V, disconnect R11 from FB1 and connect R11 to OUT12; this change maintains the minimum load requirement on the output. In this case, R12 can vary from 1k to 10k. Refer to the MAX8564 data sheet for information on selecting the compensation resistor and compensation capacitor to optimize the circuit for different output voltages.
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MAX8564 Evaluation Kit
Output Undervoltage and Overload Protection
When an overload event or short circuit occurs, the device that is most vulnerable to damage is the external n-MOSFET. The MAX8564 monitors the output voltage to protect the MOSFET. When DRV_ is at its maximum voltage and the output voltage drops below 80% but is still greater than 60% of its nominal voltage for more than 50ms, the MAX8564 shuts down that particular regulator output by pulling DRV_ to GND. Note that there is an additional inherent delay in turning off the MOSFET. The delay is a function of the compensation capacitor and the MOSFET. If the output recovers to greater than 80% within 50ms, it is not considered to be in overload and no action is taken. When the output voltage drops below 60% of its nominal voltage, the MAX8564 immediately shuts down that particular regulator output by pulling DRV_ to GND. To restart that particular LDO, VDD must be cycled below the UVLO or the corresponding EN_ must be cycled.
Jumper Settings
Jumper JU4 Function
The MAX8564 circuit features an output shutdown mode for OUT12. To shut down the output, place a shunt between pins 2 and 3 on JU4. For normal operation, remove the shunt or place it on pins 1 and 2 of JU4 (default position).
Evaluates: MAX8563/MAX8564
Jumper JU5 Function
The MAX8564 circuit features an output shutdown mode for OUT22. To shut down the output, place a shunt between pins 2 and 3 on JU5. For normal operation, remove the shunt or place it on pins 1 and 2 of JU5 (default position).
Evaluating the MAX8563
For evaluating the MAX8563, install the MAX8563 in the top circuit labeled MAX8563. All components for the MAX8563 are not installed; see the Component List for proper component selection.
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MAX8564 Evaluation Kit Evaluates: MAX8563/MAX8564
GND VDD IN1 1.8V C3 100F C2 2.2F C1 0.1F C7 100F GND GND IN2 1.2V
C6 2.2F OUT1 1.5V/1.5A GND C4 100F R3 332 POK1 GND IN3 3.3V C11 100F C10 2.2F 6** N1A C14 OPEN C5 R2 1F 620
U1 1 2 VDD DRV1 FB1
16 R4 390 C9 1F C15 OPEN R5 182
R1 665
N1B C8 100F VDD 1 2 JU2 3
MAX8563
DRV2 15
OUT2 1.05V/3A GND
VDD 1 JU1 2 3 3 4
EN1 POK1
FB2
14
EN2
13
5
GND N.C.
POK2
12
POK2
N.C.
11
R6 165 POK3 VDD
OUT3 2.5V/2A* GND C12 100F
N2
C16 OPEN R8 1k
C13 1F
POK3 R7 910 7
10
DRV3 EN3
9
8 R9 249
1 2 JU3 3
FB3
*2.5V OUTPUT ONLY WITH VDD = 12V **PIN 6 GROUNDED FOR LAYOUT PURPOSES ONLY
GND2 VDD2 IN12 1.8V C19 100F C18 2.2F C17 0.1F C22 100F GND2 GND2 IN22 1.2V
C21 2.2F OUT12 1.5V/1.5A GND2 C20 100F R11 332 N3A C26 OPEN C24 R10 1F 620
U2 1 2 VDD DRV1 FB1
10 R13 390 C25 1F C27 OPEN R14 182
R12 665
N3B C23 100F VDD2 1 2 JU5 3
MAX8564
DRV2 9
OUT22 1.05V/3A GND2
VDD2 1 JU4 2 3 POK12
3 4
EN1 POK1
FB2
8
EN2
7
5
GND
POK2
6 R15 165
POK22
Figure 1. MAX8564 EV Kit Schematic 4 _______________________________________________________________________________________
MAX8564 Evaluation Kit Evaluates: MAX8563/MAX8564
Figure 2. MAX8564 EV Kit Component Placement Guide-- Component Side
Figure 3. MAX8564 EV Kit PC Board Layout--Component Side
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MAX8564 Evaluation Kit Evaluates: MAX8563/MAX8564
Figure 4. MAX8564 EV Kit PC Board Layout--Layer 2
Figure 5. MAX8564 EV Kit PC Board Layout--Layer 3
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MAX8564 Evaluation Kit Evaluates: MAX8563/MAX8564
Figure 6. MAX8564 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.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 7 (c) 2005 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.

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