MAX6 2 9 Eva lu a t io n Kit
Evluates:MAX629
_______________Ge n e ra l De s c rip t io n
____________________________Fe a t u re s
The MAX629 evaluation kit (EV kit) contains two sepa-
rate switching-regulator circuits. The first circuit con-
♦ Output Voltage:
+24V Positive
verts a +0.8V to V
battery voltage to a +24V LCD
OUT
-20V Negative
backplane bias voltage for currents up to 20mA. The
second circuit converts a +0.8V to +12V battery voltage
to a -20V voltage for currents up to 20mA. The MAX629
re q uire s a +2.7V to +5.5V s up p ly a t VCC, b ut the
inductor can be powered from as low as 0.8V. Both out-
put voltages can be adjusted by changing the feed -
back-resistor values.
♦ Battery Input Voltage:
+0.8V to V
(Positive Output)
OUT
+0.8V to +15V (Negative Output)
♦ +2.7V to +5.5V V Supply Range
CC
♦ Up to 20mA Output Current
♦ Internal 28V N-Channel Switch
♦ 1µA (Max) IC Shutdown Current
♦ Up to 300kHz Switching Frequency
♦ Surface-Mount Components
♦ Fully Assembled and Tested
The MAX629 EV kit provides low quiescent current and
high efficiency for maximum battery life. Operation up
to 300kHz allows the use of a tiny surface-mount induc-
tor. This EV kit is a fully assembled and tested surface-
mount circuit board.
____________________Co m p o n e n t Lis t
DESIGNATION QTY
DESCRIPTION
10µF, 35V tantalum capacitors
AVX TPSD106M035R0300 or
Sprague 593D106X0035D2W
C1, C2, C10,
______________Ord e rin g In fo rm a t io n
4
C11
PART
TEMP. RANGE
BOARD TYPE
C3, C4, C8, C9
C5, C6
4
2
0.1µF ceramic capacitors
150pF ceramic capacitors
MAX629EVKIT
0°C to +70°C
Surface Mount
2.2µF ceramic capacitor
Marcon/United Chemi-Con
THCR30E1225Z
C7
1
______________Co m p o n e n t S u p p lie rs
40V, 0.5A Schottky diodes
Motorola MBR0540LT3
D1, D2, D3
JU1–JU4
L1, L2
3
4
2
SUPPLIER*
AVX
PHONE
FAX
3-pin headers
(803) 946-0690
(847) 639-6400
(561) 241-7876
(402) 564-3131
(803) 626-3123
(847) 639-1469
(561) 241-9339
(402) 563-6418
47µH inductors
Sumida CD54-470
Coilcraft
Coiltronics
Dale-Vishay
R1, R3
R2
2
1
1
1
2
4
1
576kΩ, 1% resistors
31.6kΩ, 1% resistor
35.7kΩ, 1% resistor
2Ω, 5% resistor
MAX629ESA (SO-8)
Shunts
Marcon/United
Chemi-Con
(847) 696-2000
(847) 696-9278
R4
R5
Motorola
(602) 303-5454
(603) 224-1961
(847) 956-0666
(203) 268-6261
(602) 994-6430
(603) 224-1430
(847) 956-0702
(203) 452-5670
U1, U2
None
None
Sprague
Sumida
MAX629 PC board
Vishay/Vitramon
* Please indicate that you are using the MAX629 when contact-
ing these suppliers.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800