-5V/-12V/-15V or Adjustable,
High-Efficiency, Low I
Q
DC-DC Inverters
Reference Capacitor
Bypass REF with a 0.1µF capacitor (C3). The REF out-
put can source up to 100µA for external loads.
output filter capacitor ground lead to a single point (star
ground configuration). Also minimize lead lengths to
reduce stray capacitance, trace resistance, and radiat-
ed noise. In particular, keep the traces connected to
FB and LX short.
C2 must be placed as close as pos-
sible to the V+ and GND pins.
If an external resistor
divider is used (Figure 3), the trace from FB to the resis-
tors must be extremely short.
MAX764/MAX765/MAX766
Layout Considerations
Proper PC board layout is essential to reduce noise
generated by high current levels and fast switching
waveforms. Minimize ground noise by connecting
GND, the input bypass capacitor ground lead, and the
Table 1. Component Suppliers
PRODUCTION METHOD
INDUCTORS
Sumida
CD75/105 series
Surface Mount
Coiltronics
CTX series
Coilcraft
DT/D03316 series
Miniature Through-Hole
Low-Cost Through-Hole
SUPPLIER
AVX
Coilcraft
Coiltronics
Matsuo
Motorola
Nichicon
Nihon
Renco
Sanyo OS-CON
Sprague Electric Co.
Sumida
USA:
USA:
USA:
Sumida
RCH895 series
Renco
RL1284 series
PHONE
(803) 448-9411
(708) 639-6400
(407) 241-7876
CAPACITORS
Matsuo
267 series
Sprague
595D/293D series
AVX
TPS series
Sanyo
OS-CON series (very low ESR)
Nichicon
PL series
FAX
(803) 448-1943
(708) 639-1469
(407) 241-9339
(714) 960-6492
81-6-337-6456
(602) 952-4190
(708) 843-2798
81-7-5256-4158
(805) 867-2556
81-3-3494-7414
(516) 586-5562
(619) 661-1055
81-7-2070-1174
(603) 224-1430
(708) 956-0702
81-3-3607-5144
DIODES
Nihon
EC10QS02L (Schottky)
EC11FS1 (high-speed silicon)
Motorola
1N5817, 1N5818, (Schottky)
MUR105 (high-speed silicon)
USA:
(714) 969-2491
Japan: 81-6-337-6450
USA:
(800) 521-6274
USA:
(708) 843-7500
Japan: 81-7-5231-8461
USA:
(805) 867-2555
Japan: 81-3-3494-7411
USA:
(516) 586-5566
USA:
(619) 661-6835
Japan: 81-7-2070-1005
USA:
(603) 224-1961
USA:
(708) 956-0666
Japan: 81-3-3607-5111
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11
MAXIM [ MAXIM INTEGRATED PRODUCTS ]
