19-2253; Rev 0; 12/01
MAX5026 Evaluation Kit
General Description
The MAX5026 evaluation kit (EV kit) provides a +30V
output voltage from a +3V to +11V input source. It
delivers up to 6mA output current, depending on the
input voltage. The MAX5026 is a constant-frequency,
pulse-width-modulating (PWM), current-mode step-up
voltage converter with an internal power switch that
operates at 500kHz. This EV kit demonstrates the low-
noise performance of the device.
The MAX5026 EV kit is a fully assembled and tested
surface-mount circuit board. With modifications, this EV
kit can also be used to evaluate MAX5025/
MAX5027/MAX5028. The EV kit can be used to evalu-
ate other output voltages by changing the feedback
resistors.
o
+3V to +11V Input Voltage Range
(MAX5026/MAX5028)
o
+4.5V to +11V Input Voltage Range
(MAX5025/MAX5027)
o
Output Voltage:
Adjustable Output Voltage Up to +36V
(MAX5025/MAX5026)
+30V Fixed Output Voltage (MAX5027/MAX5028)
o
Low Switching Noise
o
500kHz Switching Frequency
o
Less than 1mVp-p High-Frequency Output
Switching Ripple at 2mA Load
o
Up to 6mA Output Current with +5V Input
o
6-Pin SOT23 Package
o
Surface-Mount Construction
o
Fully Assembled and Tested
Features
Evaluates: MAX5025鈥揗AX5028
Component List
DESIGNATION
C1
QTY
1
DESCRIPTION
4.7碌F, 16V, X5R, 20% ceramic
capacitor (1206)
Taiyo Yuden EMK316BJ475ML
1碌F, 50V, X7R, 10% ceramic
capacitors (1210)
Taiyo Yuden UMK325BJ105KH
TDK C3225X7R1H105K
Murata GRM42-2X7R105K050AD
Not installed, capacitor (1210)
47碌H
鹵20%
power inductor
Toko A915BY-470M
Sumida CDRH4D28-470
0.5A, 40V Schottky diode (SOT23)
Zetex ZHCS500
147k鈩?/div>
鹵1%
resistor (0603)
6.34k鈩?/div>
鹵1%
resistor (0603)
100鈩?/div>
鹵5%
resistor (0805)
MAX5026EUT (6-Pin SOT23)
3-pin header (JU1)
Oscilloscope jack
Shunt
MAX5026 PC board
MAX5026 EV kit data sheet
MAX5026 data sheet
C2, C3
2
C4, C5
0
Ordering Information
PART
MAX5026EVKIT
TEMP. RANGE
0 C to +70 C
o
o
L1
D1
R1
R2
R3
U1
JU1
J1
None
None
None
None
1
1
1
1
1
1
1
1
1
1
1
1
IC PACKAGE
6 SOT23-6
Note:
To evaluate the MAX5025/MAX5027/MAX5028, request a
MAX5025EUT/MAX5027EUT/MAX5028EUT free sample with the
MAX5026EVKIT.
________________________________________________________________
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.
Maxim
1
2
3
4
