MAX8550EVKIT Maxim Integrated Products, MAX8550EVKIT Datasheet

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MAX8550EVKIT

Manufacturer Part Number
MAX8550EVKIT
Description
EVAL KIT FOR MAX8550
Manufacturer
Maxim Integrated Products
Datasheets

Specifications of MAX8550EVKIT

Main Purpose
Special Purpose DC/DC, DDR Memory Supply
Outputs And Type
3, Non-Isolated
Power - Output
31.8W
Voltage - Output
2.5V, 1.25V, 1.25V
Current - Output
12A, 1.5A, 10mA
Voltage - Input
9 ~ 20V
Regulator Topology
Buck
Frequency - Switching
600kHz
Board Type
Fully Populated
Utilized Ic / Part
MAX8550
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
The MAX8550 evaluation kit (EV kit) is designed to evalu-
ate the MAX8550 DDR power-supply solution for note-
books, desktops, and graphics cards. The EV kit board
produces VDDQ at the output of the synchronous PWM
buck, VTT at the output of the sourcing/sinking LDO linear
regulator, and VTTR at the output of the reference buffer.
The VDDQ output is preset to 2.5V and sources up to
12A. The VTT output is always VDDQ/2 and can
source/sink up to 3A of peak current and 1.5A of contin-
uous current. The VTTR output is also always VDDQ/2
and can source/sink up to 10mA.
The MAX8550 EV kit was conveniently designed with
jumpers to select the OVP/UVP, TON, SKIP, STBY, and
SHDN_ modes. The board’s default settings enable
OVP (overvoltage protection), 600kHz switching fre-
quency, low-noise PWM mode, VDDQ, VTT, and VTTR.
The VIN input accepts voltages from 9V to 20V and
VDD requires a 5V bias supply.
The EV kit comes with the MAX8550 installed. Contact
the factory for free samples of the MAX8550A or
MAX8551 to evaluate these parts.
19-3436; Rev 1; 11/04
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.
C8A, C8B, C8C
DESIGNATION QTY
C2, C4A, C4B,
C3, C6, C13
C4C, C4D,
C4E, C4F
C7, C10
C1
C5
________________________________________________________________ Maxim Integrated Products
1
7
3
1
2
3
0.1µF ±10%, 50V X7R ceramic
capacitor (0603)
TDK C1608X7R1H104K
10µF ±10%, 6.3V X5R ceramic
capacitors (1206)
TDK C3216X5R0J106K or
TDK C3216X5R0J106M
1µF ±10%, 10V X5R ceramic
capacitors (0603)
TDK C1608X5R1A105K
4.7µF ±20%, 6.3V X5R ceramic
capacitor (0805)
TDK C2012X5R0J475M
0.22µF ±20%, 16V X7R ceramic
capacitors (0603)
TDK C1608X7R1C224M
10µF ±20%, 25V X5R ceramic
capacitors (1210)
Taiyo Yuden TMK325BJ106MM
TDK C3225X5R1E106M
General Description
DESCRIPTION
MAX8550 Evaluation Kit
♦ VDDQ Preset to 2.5V/12A
♦ VTT 1.25V Source/Sink 1.5A Continuous/3A Peak
♦ VTTR 1.25V Source/Sink 10mA
♦ VIN Range: 9V to 20V
♦ Optimized Switching Frequency: 600kHz
♦ Overvoltage/Undervoltage Protection
♦ Standby
♦ Independent Shutdown
♦ Power OK
Note: To evaluate the MAX8550A, request a free sample of the
MAX8550AETI when ordering the MAX8550 EV kit. To evaluate
the MAX8551, request a free sample of the MAX8551ETI when
ordering the MAX8550 EV kit.
MAX8550EVKIT
DESIGNATION QTY
C11, C12
C15, C16
JU1, JU2
JU3–JU6
PART
C8D
C14
C9
D1
TEMP RANGE
0
1
2
1
2
1
2
4
0°C to +70°C
Not installed
470µF ±20%, 25V aluminum
electrolytic capacitor (10mm x 16mm)
Sanyo 25MV470WX
3900pF, 50V X7R ceramic capacitor
(0603)
Kemet C0603C392K5RAC
150µF, 4V, 25mΩ low-ESR POS
capacitors (D2E)
Sanyo 4TPE150M
470pF ±5%, 50V COG ceramic
capacitor (0603)
TDK C1608COG1H471J
Not installed (0603)
S chottky d i od e, 30V , 100m A ( S OD - 323)
Central CMDSH-3
4-pin headers
3-pin headers
Ordering Information
Component List
DESCRIPTION
28 Thin QFN 5mm x 5mm
IC PACKAGE
Features
1

Related parts for MAX8550EVKIT

MAX8550EVKIT Summary of contents

Page 1

... Independent Shutdown ♦ Power OK Ordering Information PART TEMP RANGE MAX8550EVKIT 0°C to +70°C Note: To evaluate the MAX8550A, request a free sample of the MAX8550AETI when ordering the MAX8550 EV kit. To evaluate the MAX8551, request a free sample of the MAX8551ETI when ordering the MAX8550 EV kit. ...

Page 2

MAX8550 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION 1.0µH, 20A, 1.6mΩ power inductor L1 1 (12.6mm x 12.6mm x 5.2mm) TOKO FDA1254-1R0M n-channel MOSFET 30V, 9mΩ (SO- International Rectifier IRF7821 n-channel MOSFET 30V, 5mΩ (SO- ...

Page 3

Table 2. On-Time Selection Input (TON) SHUNT JUMPER DESCRIPTION POSITION JU2 1-2* 600kHz switching frequency JU2 1-3 450kHz switching frequency JU2 1-4 200kHz switching frequency JU2 Open 300kHz switching frequency *Default position. Note: Refer to the MAX8550/MAX8551 or MAX8550A data ...

Page 4

MAX8550 Evaluation Kit falling transitions and may interfere with circuit perfor- mance and generate EMI. To dampen this ringing, an optional series RC snubber circuit is added across the low-side switch. Below is a simple procedure for select- ing the ...

Page 5

Figure 1. MAX8550 EV Kit Schematic _______________________________________________________________________________________ MAX8550 Evaluation Kit 5 ...

Page 6

MAX8550 Evaluation Kit Figure 2. MAX8550 EV Kit Component Placement Guide—Component Side Figure 3. MAX8550 EV Kit PC Board Layout—Component Side 6 _______________________________________________________________________________________ ...

Page 7

Figure 4. MAX8550 EV Kit PC Board Layout—Inner Layer 2 (GND, PGND1 and PGND2) Figure 5. MAX8550 EV Kit PC Board Layout—Inner Layer 3 (GND, PGND1 and PGND2) _______________________________________________________________________________________ MAX8550 Evaluation Kit 7 ...

Page 8

... 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 _____________________ 8 © 2004 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products ...

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