19-1886; Rev 0; 12/00
MAX1761 Evaluation Kit
General Description
The MAX1761 evaluation kit (EV kit) demonstrates a
standard 2A application circuit. This DC-DC converter
steps down high-voltage batteries and/or AC adapters,
generating a precision, low-voltage rail for use as
chipset, I/O, and other low-voltage supplies in notebook
computers and PDAs.
The MAX1761 EV kit provides dual 1.8V and 2.5V out-
put voltages from a +5V to +20V battery input range. It
delivers up to a 2A output current for each output with
greater than 90% efficiency. The EV kit operates at
300kHz switching frequency and has superior line- and
load-transient response.
This EV kit is a fully assembled and tested circuit
board. It also allows the evaluation of other output volt-
ages in the 1.0V to 5.5V range by changing feedback
resistors R1鈥揜4.
o
+5V to +20V Input Voltage Range
o
Preset 1.8V and 2.5V Output Voltages
o
Adjustable Output Voltages (1V to 5.5V, external
divider)
o
2A Output Current
o
300kHz Switching Frequency
o
No Current-Sense Resistor
o
4碌A V+ Shutdown Supply Current
o
5碌A V
L
Shutdown Supply Current
o
16-Pin QSOP Package
o
Low-Profile Components
o
Fully Assembled and Tested
Features
Evaluates: MAX1761
Ordering Information
PART
MAX1761EVKIT
TEMP. RANGE
0 C to +70 C
o
o
IC PACKAGE
16 QSOP
Component List
DESIGNATION
C1
C2, C7鈥揅11
QTY
1
0
2
DESCRIPTION
10碌F, 25V ceramic capacitor (1812)
Taiyo Yuden TMK432BJ106KM or
TDK C4532X5R1E106M
Not installed (0805)
220碌F, 10V low-ESR 40m鈩?capacitors
Sanyo 10TPB220M or
330碌F, 10V low-ESR 30m
鈩?/div>
capacitors
Kemet T510X337M010AS
0.1碌F ceramic capacitor (0805)
4.7碌F, 10V X5R ceramic capacitor
(1206)
Taiyo Yuden LMK316BJ475ML
1碌F, 25V X5R ceramic capacitor
Taiyo Yuden TMK316BJ105ML
Not installed
Nihon EP10QY03
DESIGNATION
L1, L2
QTY
2
DESCRIPTION
7碌H power inductors
Sumida CDRH104R-7R0NC
Dual N- and P-channel MOSFETs
International Rectifier IRF7319 or
Fairchild FDS8958A
Not installed (0805)
1M鈩?/div>
鹵5%
resistors (0805)
10鈩?/div>
鹵5%
resistor (0805)
Not installed
MAX1761EEE (16-pin QSOP)
DIP-3 dip switch
Rubber bumpers 3M SJ-5007
Mouser 517-SJ-5007BK or
equivalent
MAX1761 PC board
MAX1761 data sheet
MAX1761 EV kit data sheet
N1, P1, N2, P2
R1鈥揜6
R7, R8
R9
R10鈥揜13
U1
SW1
None
None
None
None
2
0
2
1
0
1
1
4
1
1
1
C3, C4
C5
C6
1
1
C12
D1, D2
1
0
________________________________________________________________
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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