MAX8632_0510 Datasheet, PDF (1/9 Pages) Maxim Integrated Products – Evaluation Kit

19-3840; Rev 0; 10/05
MAX8632 Evaluation Kit
General Description
The MAX8632 evaluation kit (EV kit) is designed to evalu-
ate the MAX8632 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 1.8V and sources up to
10A. The VTT output is always VDDQ/2 and can
source/sink up to 3A of peak current and 1.5A of continu-
ous current. The VTTR output is also always VDDQ /2
and can source/sink up to 10mA.
The MAX8632 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), 300kHz switching frequency,
low-noise PWM mode, VDDQ, VTT, and VTTR.
The VIN input accepts voltages from 7V to 20.5V and
VDD requires a 5V bias supply.
Features
♦ VDDQ Preset to 1.8V/10A
♦ VTT 0.9V Source/Sink 1.5A Continuous/3A Peak
♦ VTTR 0.9V Source/Sink 10mA
♦ V_IN Range: 7V to 20.5V
♦ Optimized Switching Frequency: 300kHz
♦ Overvoltage/Undervoltage Protection
♦ Independent Shutdown and Standby Controls
♦ Power OK
Ordering Information
PART
TEMP RANGE
IC PACKAGE
MAX8632EVKIT 0°C to +70°C 28 Thin QFN 5mm x 5mm
DESIGNATION QTY
DESCRIPTION
0.1µF ±10%, 16V X7R (0603) ceramic
C1
1 capacitor
Taiyo Yuden EMK107BJ104MA
C2, C4A,
C4B
10µF ±10%, 6.3V X5R (0805) ceramic
3 ^capacitors
Kemet C0805C106K9PAC
Taiyo Yuden JMK212BJ106MG
C3, C6
1µF ±10%, 10V X5R (0603) ceramic
2 capacitors
TDK C1608X5R1A105K
4.7µF ±20%, 6.3V (0805) X5R ceramic
C5
1 capacitor
TDK C2012X5R0J475M
C7, C10
0.22µF ±20%, 16V X7R (0603)
2 ceramic capacitors
TDK C1608X7R1C224M
10µF ±20%, 25V X5R (1210) ceramic
C8A, C8B, C8C
3
capacitors
Taiyo Yuden TMK325BJ106MM
TDK C3225X5R1E106M
Component List
DESIGNATION QTY
DESCRIPTION
4700pF ±10%, 50V X7R (0603)
C9
1
ceramic capacitor
Kemet C0603C472K5RAC or
equivalent
C11, C12
D1
2 ^{150µF, 4V, 18mΩ POS capacitors}
Sanyo 4TPE150MI
1 ^{Schottky diode, 30V, 100mA (SOD-323)}
Central CMDSH-3
JU1–JU4, JU6
3-pin headers, 0.1in center
5
36-pin header, 0.1in center
Sullins PTC36SAAN or equivalent
Digi-key S1012-36-ND
L1
1
1.4µH, 15.5A, 2.8mΩ power inductor
Sumida CEP125-1R4MC-U
Q1
1
30V, 12mΩ (SO-8) n-channel MOSFET
International Rectifier IRF7821
Q2
1
30V, 4mΩ (SO-8) n-channel MOSFET
International Rectifier IRF7832
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