19-2651; Rev 0; 10/02
MAX1973/MAX1974 Evaluation Kit
General Description
The MAX1973/MAX1974 evaluation kit (EV kit) is a fully
assembled and tested circuit board with separate circuits
to evaluate the MAX1973 and MAX1974. Both circuits
have an input voltage range of 2.6V to 5.5V. The output of
the MAX1973 circuit (OUT1) is a selectable preset of 2.5V
or 1.8V, or can be adjusted from 1.25V to V
IN
by adding
external feedback resistors. The output of the MAX1974
circuit (OUT2) is a selectable preset of 1.5V or 1V, or can
be adjusted from 0.75V to V
IN
by adding external feed-
back resistors. Each output can deliver 1A. The MAX1973
circuit also features jumper-selected voltage margining,
which allows the output voltage to be increased or
decreased by 4%, while the MAX1974 circuit features a
power-OK (POK) output that indicates when the regulator
output voltage is in regulation.
o
Tiny 0.19in
2
Circuit Footprint
o
Ultra-Low 1.8mm Circuit Height
o
4.7碌F Ceramic Input and Output Capacitors
o
2.6V to 5.5V Input Voltage Range
o
Up to 1A Output Current
o
1% Accurate Output Voltage
o
Built-In 鹵4% Logic-Controlled Voltage Margining
(MAX1973)
o
Preset 1V, 1.5V, 1.8V, and 2.5V Outputs or
0.75V to V
IN
Adjustable Output
o
Fixed-Frequency Current-Mode PWM Operation
o
1.4MHz Switching Frequency鈥擮peration Outside
DSL Band
o
100% Duty Cycle Dropout Capability
o
Power-OK Output (MAX1974)
Features
Evaluate: MAX1973/MAX1974
Component Suppliers
SUPPLIER
Murata
Sumida
Taiyo Yuden
PHONE
770-436-1300
847-956-0666
408-573-4150
WEBSITE
www.murata.com
www.sumida.com
www.t-yuden.com
o
Fully Assembled and Tested
Ordering Information
PART
MAX1973EVKIT
TEMP RANGE
-40擄C to +85擄C
IC PACKAGE
10 碌MAX
Note:
Please indicate that you are using the MAX1973/MAX1974
when contacting these component suppliers.
Component List
DESIGNATION
C1, C3, C5, C7
QTY
4
DESCRIPTION
4.7碌F
鹵10%,
6.3V X5R capacitors
(0805)
Taiyo Yuden JMK212BJ475KG
560pF
鹵5%,
50V (0603) capacitor
Murata GRM39COG561J50
0.1碌F
鹵10%,
16V X7R capacitors
(0603)
Taiyo Yuden EMK107BJ104KA
330pF
鹵5%,
50V (0603) capacitor
Murata GRM39COG331J50
3-pin headers
Shunts
DESIGNATION
L1, L2
R1
R2, R4
R3, R5
R6
R7
U1
U2
None
None
QTY
2
1
0
0
1
1
1
1
1
1
DESCRIPTION
3.3碌H, 1.1A inductors
Sumida CDRH3D16-3R3
43k鈩?/div>
鹵5%
resistor (0603)
Not installed, PC board short (0603)
Not installed (0603)
43k鈩?/div>
鹵5%
resistor (0603)
100k鈩?/div>
鹵5%
resistor (0603)
MAX1973EUB, 10-pin 碌MAX
MAX1974EUB, 10-pin 碌MAX
MAX1973 EV kit PC board
MAX1973 EV kit data sheet
C2
1
C4, C8
2
C6
JU1鈥揓U5
鈥?/div>
1
5
5
________________________________________________________________
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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