19-1914; Rev 1; 1/01
MAX5003 Evaluation Kit
General Description
The MAX5003 evaluation kit (EV kit) provides a regulat-
ed 5V output voltage up to 1A while operating from a
+36V to +72V input voltage.
Features
ꢀ 5V at 1A Output
ꢀ +36V to +72V Input Voltage Range
ꢀ 300kHz Switching Frequency
The MAX5003 EV kit is a fully assembled and tested
surface-mount printed circuit (PC) board. It comes with
the output voltage set to 5V. This EV kit is configured as
a flyback converter, and can easily be configured for
either isolated or nonisolated operation by selecting the
state of a mechanical switch. Additionally, for systems
in which the input and output ground references are not
at the same potential and for which isolation is not
desired, the user has the option to install a level-shifter
(not supplied) in the controller feedback loop.
ꢀ Can be Configured for -48V Input and +5V Output
ꢀ Selectable Isolated or Nonisolated Operation
ꢀ Proven PC Board Layout
ꢀ Fully Assembled and Tested Surface-Mount Board
WARNING: Dangerous voltages are present on this EV
kit and on equipment connected to it. Users who power
up this EV kit or power the sources connected to it must
be careful to follow safety procedures appropriate to
working with high-voltage electrical equipment.
Ordering Information
PART
TEMP. RANGE
IC PACKAGE
MAX5003EVKIT
0°C to +70°C*
16 QSOP
*With air flow.
Under severe fault or failure conditions, this EV kit may
dissipate large amounts of power, which could result in
the mechanical ejection of a component or of compo-
nent debris at high velocity. Operate this kit with care to
avoid possible personal injury.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
33µF, 100V electrolytic capacitor
Sanyo 100MV33CZ
2N3904-type NPN transistor
Central Semiconductor CMPT3904 or
equivalent
DESIGNATION
C1
1
2
Q2
1
22µF, 10V ceramic capacitors
Taiyo Yuden LMK432BJ226MM
C2, C3
R1
1
1
1
3
1
41.2kΩ 1ꢀ resistor
17.4kΩ 1ꢀ resistor
68kΩ 5ꢀ resistor
1MΩ 5ꢀ resistors
39kΩ 5ꢀ resistor
C5
C6
C7
1
1
1
2200pF 10ꢀ ceramic capacitor
3900pF 10ꢀ ceramic capacitor
0.01µF ceramic capacitor
R2
R3
R4, R22, R23
R5
10µF, 16V ceramic capacitor
Taiyo Yuden EMK325BJ106MN
C8
1
R6
R7
1
1
2
51kΩ 5ꢀ resistor
200kΩ 5ꢀ resistor
43Ω 5ꢀ resistors
0.11Ω 1ꢀ, 1ꢁ4ꢂ resistor
Dale ꢂSL-1206ꢁ0.11Ωꢁ1ꢀ
100Ω 5ꢀ resistor
100kΩ 5ꢀ resistor
20kΩ 5ꢀ resistor
1.3kΩ 5ꢀ resistor
240kΩ 5ꢀ resistor
24.9kΩ 1ꢀ resistors
Not installed
C9
C10
1
1
3
1
100pF 10ꢀ ceramic capacitor
0.47µF ceramic capacitor
R8, R15
C11, C13, C17
C12
0.1µF ceramic capacitors
R9
1
390pF 10ꢀ ceramic capacitor
4.7µF, 25V tantalum capacitor
AVX TAJB475M025
R10
R11
1
1
1
1
1
2
0
C16
D1
1
1
1
30V, 1A Schottky diode
Fairchild MBRS130L
R12
R13
Small-signal switching diode
Central Semiconductor CMSD4448
D2
R14
R16, R17
R18
200V, 5.2A N-channel MOSFET
International Rectifier IRF620S
N1
Q1
1
0
Not installed
________________________________________________________________ Maxim Integrated Products
1
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.