MAX629 Evaluation Kit
_______________General Description
The MAX629 evaluation kit (EV kit) contains two sepa-
rate switching-regulator circuits. The first circuit con-
verts a +0.8V to V
OUT
battery voltage to a +24V LCD
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
requires a +2.7V to +5.5V supply at VCC, but 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.
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.
____________________________Features
o
Output Voltage:
+24V Positive
-20V Negative
o
Battery Input Voltage:
+0.8V to V
OUT
(Positive Output)
+0.8V to +15V (Negative Output)
o
+2.7V to +5.5V V
CC
Supply Range
o
Up to 20mA Output Current
o
Internal 28V N-Channel Switch
o
1碌A(chǔ) (Max) IC Shutdown Current
o
Up to 300kHz Switching Frequency
o
Surface-Mount Components
o
Fully Assembled and Tested
Evaluates: MAX629
____________________Component List
DESIGNATION QTY
C1, C2, C10,
C11
C3, C4, C8, C9
C5, C6
C7
D1, D2, D3
JU1鈥揓U4
L1, L2
R1, R3
R2
R4
R5
U1, U2
None
None
4
4
2
1
3
4
2
2
1
1
1
2
4
1
DESCRIPTION
10碌F, 35V tantalum capacitors
AVX TPSD106M035R0300 or
Sprague 593D106X0035D2W
0.1碌F ceramic capacitors
150pF ceramic capacitors
2.2碌F ceramic capacitor
Marcon/United Chemi-Con
THCR30E1225Z
40V, 0.5A Schottky diodes
Motorola MBR0540LT3
3-pin headers
47碌H inductors
Sumida CD54-470
576k鈩? 1% resistors
31.6k鈩? 1% resistor
35.7k鈩? 1% resistor
2鈩? 5% resistor
MAX629ESA (SO-8)
Shunts
MAX629 PC board
______________Ordering Information
PART
MAX629EVKIT
TEMP. RANGE
0擄C to +70擄C
BOARD TYPE
Surface Mount
______________Component Suppliers
SUPPLIER*
AVX
Coilcraft
Coiltronics
Dale-Vishay
Marcon/United
Chemi-Con
Motorola
Sprague
Sumida
Vishay/Vitramon
PHONE
(803) 946-0690
(847) 639-6400
(561) 241-7876
(402) 564-3131
(847) 696-2000
(602) 303-5454
(603) 224-1961
(847) 956-0666
(203) 268-6261
FAX
(803) 626-3123
(847) 639-1469
(561) 241-9339
(402) 563-6418
(847) 696-9278
(602) 994-6430
(603) 224-1430
(847) 956-0702
(203) 452-5670
*
Please indicate that you are using the MAX629 when contact-
ing these suppliers.
________________________________________________________________
Maxim Integrated Products
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For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800
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