19-2156; Rev 0; 9/01
MAX1809 Evaluation Kit
General Description
The MAX1809 evaluation kit (EV kit) provides a +1.1V
output voltage from a +3V to +5.5V input source. It
sources and sinks up to 3A of current. The MAX1809 is
a step-down switching regulator with an internal syn-
chronous-rectifier that operates up to 1MHz, minimizing
external components. The device features a resistor-
programmable, fixed off-time current-mode operation
for superior load- and line-transient response, and
achieves efficiencies up to 93%.
o
鹵3A Output Current
o
Up to 1MHz Switching Frequency
o
Up to 93% Efficiency
o
Synchronous Rectification for Improved
Efficiency
o
Output Voltage: +1.1V to V
IN
Adjustable
o
+3V to +5.5V Input Voltage Range
o
Less than 1碌A Typical IC Shutdown Current
o
Surface-Mount Construction
o
Fully Assembled and Tested
Features
Evaluates: MAX1809
Ordering Information
PART
MAX1809EVKIT
TEMP. RANGE
0擄C to +70擄C
IC PACKAGE
16 QSOP
Component List
DESIGNATION
C1
C2, C9
C3
C4
QTY
1
0
1
1
DESCRIPTION
33碌F, 6.3V, X5R ceramic capacitor
TDK C3225XR0J336V
Not installed
270碌F, 2V, 15m鈩?ESR SP
capacitor
Panasonic EEFUE0D271R
0.01碌F, 50V, X7R ceramic
2.2碌F, 10V, X5R ceramic
capacitor
Taiyo Yuden LMK212BJ225MG
TDK C2012X5R1A225M
1碌F, 10V, X7R ceramic capacitor
Taiyo Yuden LMK212BJ105MG
Murata GRM40X7R105K010
TDK C2012X5R1C105K
1000pF, 50V, C0G ceramic
capacitors
Not installed
Diode
Diodes Inc. 1N4148W
Fairchild MMSD4148
General Semiconductor 1N4148W
L1
1
DESIGNATION
JU1, JU2
JU3
QTY
2
0
DESCRIPTION
2-pin headers
Not installed
1碌H, 3A inductor
Sumida 4762-T072 (CDRH6D28
type)
Toko A920CY-1R0M (D62CB type)
10k鈩?鹵1% resistors
10鈩?鹵5%resistor
1M鈩?鹵5% resistor
130k鈩?鹵1% resistor
0.012鈩?鹵1%, 0.5W sense
resistor
Vishay Dale WSL-2010-R012F
IRC LRC-LR2010-01-R012-F
100鈩?鹵5% resistor
Not installed
MAX1809EEE (16-QSOP)
Shunts for JU1 and JU2
R1, R2
R3
R4
R5
2
1
1
1
C5
1
C6
1
R6
R7
R8
U1
None
1
1
0
1
2
C7, C8
D1, D2
2
0
D3
1
________________________________________________________________
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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