MAX1698EVKIT Datasheet, PDF (1/4 Pages) Maxim Integrated Products – Fully assembled and tested circuit board that contains a boost switching-regulator current source and array of white LEDs

19-1677; Rev 0; 4/00
MAX1698 Evaluation Kit
General Description
The MAX1698 evaluation kit (EV kit) is a fully assembled
and tested circuit board that contains a boost switch-
ing-regulator current source and array of white LEDs.
As configured, the circuit is set up to drive 3 banks of 3
series LED arrays at 20mA each; however, a wide vari-
ety of other configurations are possible. The IC can be
powered from a separate +2.7VDC to +5.5VDC input,
while LED power has a wider input range and can be
supplied either from a logic supply or battery source.
The MAX1698 features digital soft-start and adjustable
lossless LED current control. The MAX1698 EV kit
demonstrates low quiescent current, open-circuit pro-
tection, and up to 90% efficiency for maximum battery
life. Operation up to 500kHz allows the use of tiny sur-
face-mount components.
Component List
DESIGNATION QTY
DESCRIPTION
C1
1
10µF, 25V X5R ceramic cap (1812)
Taiyo Yuden TMK432BJ106KM
1µF, 25V X5R ceramic cap (1206)
C2
1 Taiyo Yuden TMK316BJ105KL or
Murata GRM42-6X7R105K025A
C3
1
1µF, 6.3V X5R ceramic cap (0603)
Taiyo Yuden JMK107BJ105KA
40V, 0.5A Schottky diode (SOD-123)
D1
1 Motorola MBR0540T1 or
Nihon EP05Q04
D2
1
24V, 350mW zener diode (SOT-23)
Central Semiconductor CMPZ5253B
D3–D11
9
White LEDs
Nichia NSPW500BS (T-1-3/4)
L1
1
10µH inductor
Sumida CDRH5D18-100NC
30V, 2.2A, N-channel MOSFET
N1
1 (SuperSOT™-3)
Fairchild Semiconductor FDN337N
R1
1
500kΩ potentiometer
Bourns 3352E-1-504
R2, R3, R4
U1
JU1
None
None
None
None
3 15Ω ±1% resistors (0805)
1 MAX1698EUB (10-pin µMAX)
1 3-pin header
1 Shunt (JU1)
1 MAX1698 PC board
1 MAX1698 data sheet
1 MAX1698 EV kit data sheet
Features
o Input Voltage Down to +0.8V
o 3x3 White LED Array
o Potentiometer-Adjustable Output Current Level
(LED Brightness Control)
o External Low-Loss N-Channel Switch
o 10nA IC Shutdown Current
o Operation Up to 500kHz Switching Frequency
o Surface-Mount Components
o Fully Assembled and Tested
PART
MAX1698EVKIT
Ordering Information
TEMP. RANGE
0°C to +70°C
IC PACKAGE
10 µMAX
Component Suppliers
SUPPLIER
PHONE
FAX
Central
Semiconductor
516-435-1110
516-435-1824
Fairchild
Motorola
Murata
408-822-2000
602-303-5454
814-956-0666
408-822-2102
602-994-6430
847-238-0490
Nichia America
Corporation
408-573-0933
408-573-0934
Nihon USA
Sumida
Taiyo Yuden
661-867-2555
708-956-0666
408-573-4150
661-867-2698
708-956-0702
408-573-4159
Note: Please indicate that you are using the MAX1698 when
contacting these component suppliers.
SuperSOT is a trademark of Fairchild Semiconductor.
Quick Start
The MAX1698 EV kit is fully assembled and tested.
Follow these steps to verify board operation. Do not
turn on the power supply until all connections are
completed.
________________________________________________________________ Maxim Integrated Products 1
For free samples and the latest literature, visit www.maxim-ic.com or phone [phone].
For small orders, phone [phone].