19-2491; Rev 0; 7/02
MAX1917 Evaluation Kit
General Description
The MAX1917 evaluation kit (EV kit) demonstrates the
MAX1917鈥檚 standard 7A application circuit. This DC-DC
converter provides a complete power-management solu-
tion for DDR memory. This EV kit is a fully assembled
and tested circuit board. The MAX1917 EV kit generates
a regulated voltage for VTT and VTTR that is half the
voltage at the DDR input. The input voltage range is
2.5V to 14V. The circuit is configured to deliver 7A of
output current. The DC-DC converter uses buck topology
with synchronous rectification to achieve low output
voltage with greater than 90% efficiency. The converter
output is capable of sourcing and sinking current. Sink
capabilities at low voltage arise from the use of a syn-
chronous rectifier, which allows the inductor current to
reverse. The EV kit operates at 550kHz switching fre-
quency and has superior load-transient response that
meets JEDEC specifications for DDR memory.
o
鹵1% Output Voltage Accuracy
o
2.5V to 14V Input Voltage Range
o
7A Output Current Capability
o
Sourcing and Sinking Current
o
550kHz Switching Frequency
o
16-Pin QSOP Package
o
Low-Profile Components
o
Fully Assembled and Tested
Features
o
Automatically Sets VTT and VTTR to 1/2 VDDR
Evaluates: MAX1917
Ordering Information
PART
MAX1917EVKIT
TEMP RANGE
0擄C to +70擄C
IC PACKAGE
16 QSOP
Component List
DESIGNATION
QTY
DESCRIPTION
10碌F, 25V X5R ceramic capacitors
(1812)
Taiyo Yuden TMK432BJ106KM or
TDK C4532X5R1E106M
Not installed, E case
270碌F, 2V, 15m鈩?low-ESR specialty
polymer capacitors, E case
Panasonic EEFUE0E271R
10碌F, 6.3V X5R ceramic capacitors
(1206)
Taiyo Yuden JMK212BJ106MG or
TDK C3216X5R0J106M
0.47碌F, 25V X5R ceramic capacitor
(1206)
Taiyo Yuden TMK316BJ474ML
0.47碌F, 6.3V X5R ceramic capacitors
(0603)
Taiyo Yuden JMK107BJ474MA
4.7碌F, 6.3V X5R ceramic capacitor
(0805)
Taiyo Yuden JMK212BJ475MG
1碌F, 6.3V X5R ceramic capacitors
(0603)
Taiyo Yuden JMK107BJ105MA
100mA Schottky diode
Central Semiconductor CMPSH-3
Scope probe connector
Berg Electronics 33JR135-1
3-pin header
DESIGNATION
JU2, JU3
JU4
L1
N1, N2
Q1
QTY
2
1
1
2
1
DESCRIPTION
2-pin headers
Not installed
0.8碌H, 16A power inductor
Sumida CDEP105L-0R8
N-channel MOSFETs (8-pin SO)
International Rectifier IRF7811W
N-channel MOSFET (SOT23)
Central Semiconductor 2N7002
Not installed, complementary
P-N MOSFETs (SC-89)
Siliconix Si1029X
Not installed (0805)
5.1k鈩?鹵5% resistor (0805)
100k鈩?鹵5% resistor (0805)
0.002鈩?鹵1%, 1W resistor (2512)
Panasonic ERJM1WTF2M0U
10k鈩?鹵5% resistor (0805)
Not installed (short PC trace) (0805)
20鈩?鹵5% resistor (0805)
MAX1917EEE (16-pin QSOP)
Shunts
Rubber bumpers
3M SJ-5007
Mouser 517-SJ-5007BK or equivalent
MAX1917 PC board
MAX1917 data sheet
MAX1917 EV kit data sheet
C1, C2, C3
C4, C5
C6鈥揅9
3
0
4
C10, C11
2
Q2
R1, R5, R7
R2
R3
R4
R6
R8
R9
U1
None
None
None
None
None
0
0
1
1
1
1
0
1
1
3
4
1
1
1
C12
1
C13, C14
2
C15
1
C16, C17
D1
J1
JU1
2
1
1
1
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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