General Description
The MAX1917 evaluation kit (EV kit) demonstrates the
MAX1917’s 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.
Features
♦ Automatically Sets VTT and VTTR to 1/2 V
DDR
♦ ±1% Output Voltage Accuracy
♦ 2.5V to 14V Input Voltage Range
♦ 7A Output Current Capability
♦ Sourcing and Sinking Current
♦ 550kHz Switching Frequency
♦ 16-Pin QSOP Package
♦ Low-Profile Components
♦ Fully Assembled and Tested
Evaluates: MAX1917
MAX1917 Evaluation Kit
________________________________________________________________ Maxim Integrated Products 1
DESIGNATION QTY DESCRIPTION
C1, C2, C3 3
10µF, 25V X5R ceramic capacitors
(1812)
Taiyo Yuden TMK432BJ106KM or
TDK C4532X5R1E106M
C4, C5 0 Not installed, E case
C6–C9 4
270µF, 2V, 15mΩ low-ESR specialty
polymer capacitors, E case
Panasonic EEFUE0E271R
C10, C11 2
10µF, 6.3V X5R ceramic capacitors
(1206)
Taiyo Yuden JMK212BJ106MG or
TDK C3216X5R0J106M
C12 1
0.47µF, 25V X5R ceramic capacitor
(1206)
Taiyo Yuden TMK316BJ474ML
C13, C14 2
0.47µF, 6.3V X5R ceramic capacitors
(0603)
Taiyo Yuden JMK107BJ474MA
C15 1
4.7µF, 6.3V X5R ceramic capacitor
(0805)
Taiyo Yuden JMK212BJ475MG
C16, C17 2
1µF, 6.3V X5R ceramic capacitors
(0603)
Taiyo Yuden JMK107BJ105MA
D1 1
100mA Schottky diode
Central Semiconductor CMPSH-3
J1 1
Scope probe connector
Berg Electronics 33JR135-1
JU1 1 3-pin header
Ordering Information
19-2491; Rev 0; 7/02
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.
PART TEMP RANGE IC PACKAGE
MAX1917EVKIT 0°C to +70°C 16 QSOP
DESIGNATION QTY DESCRIPTION
JU2, JU3 2 2-pin headers
JU4 1 Not installed
L1 1
0.8µH, 16A power inductor
Sumida CDEP105L-0R8
N1, N2 2
N-channel MOSFETs (8-pin SO)
International Rectifier IRF7811W
Q1 1
N-channel MOSFET (SOT23)
Central Semiconductor 2N7002
Q2 0
Not installed, complementary
P-N MOSFETs (SC-89)
Siliconix Si1029X
R1, R5, R7 0 Not installed (0805)
R2 1 5.1kΩ ±5% resistor (0805)
R3 1 100kΩ ±5% resistor (0805)
R4 1
0.002Ω ±1%, 1W resistor (2512)
Panasonic ERJM1WTF2M0U
R6 1 10kΩ ±5% resistor (0805)
R8 0 Not installed (short PC trace) (0805)
R9 1 20Ω ±5% resistor (0805)
U1 1 MAX1917EEE (16-pin QSOP)
None 3 Shunts
None 4
Rubber bumpers
3M SJ-5007
Mouser 517-SJ-5007BK or equivalent
None 1 MAX1917 PC board
None 1 MAX1917 data sheet
None 1 MAX1917 EV kit data sheet
