Datasheet
Capacitor Selection
A 47µF, 10V surface-mount tantalum (SMT) output filter
capacitor provides 80mV output ripple when stepping
up from 2V to 5V. Smaller capacitors (down to 10µF
with higher ESRs) are acceptable for light loads or in
applications that can tolerate higher output ripple.
Values in the 10µF to 100µF range are recommended.
The equivalent series resistance (ESR) of both bypass
and filter capacitors affects efficiency and output rip-
ple. Output voltage ripple is the product of the peak
inductor current and the output capacitor ESR. Use
low-ESR capacitors for best performance, or connect
two or more filter capacitors in parallel. Low-ESR, SMT
tantalum capacitors are currently available from
Sprague (595D series) AVX (TPS series) and other
sources. Ceramic surface-mount and Sanyo OS-CON
organic-semiconductor through-hole capacitors also
exhibit very low ESR, and are especially useful for oper-
ation at cold temperatures. See Table 3 for a list of sug-
gested component suppliers.
High-Efficiency, Low-Supply-Current,
Compact, Step-Up DC-DC Converters
PRODUCTION
METHOD
INDUCTORS CAPACITORS
RECTIFIERS
(OPTIONAL)
Surface Mount
Sumida CD43 series
Sumida CD54 series
Coilcraft DT1608C
Coilcraft DO1608C
Coiltronics Uni-PAC
Murata LQH4 series
Sprague 593D series
Sprague 595D series
AVX TPS series
ceramic
Motorola MBR0530
Nihon EC 15QS02L
Miniature Through-Hole Sumida RCH654-220 Sanyo OS-CON series —
Table 1. Suggested Components
Table 2. Surface-Mount Inductor
Specifications
MANUFACTURER
PART NUMBER
µH Ω (max) I
PEAK
(A)
HEIGHT
(mm)
Coilcraft DT1608C-103 10 0.095 0.7 2.92
Coilcraft DO1608C-153 15 0.200 0.9 2.92
Coilcraft DO1608C-223 22 0.320 0.7 2.92
Coiltronics UP1B-100 10 0.111 1.9 5.0
Table 3. Component Suppliers
COMPANY PHONE FAX
AVX USA (803) 946-0690 USA (803) 626-3123
Coilcraft USA (847) 639-6400 USA (847) 639-1469
Coiltronics USA (561) 241-7876 USA (561) 241-9339
Murata
USA (814) 237-1431
(800) 831-9172
USA (814) 238-0490
Nihon
USA (805) 867-2555
Japan 81-3-3494-7411
USA (805) 867-2556
Japan 81-3-3494-7414
Motorola
USA (303) 675-2140
(800) 521-6274
USA (303) 675-2150
Sanyo
USA (619) 661-6835
Japan 81-7-2070-6306
USA (619) 661-1055
Japan 81-7-2070-1174
Sumida
USA (647) 956-0666
Japan 81-3-3607-5111
USA (647) 956-0702
Japan 81-3-3607-5144
Taiyo Yuden USA (408) 573-4150 USA (408) 573-4159
Sprague USA (603) 224-1961 USA (603) 224-1430
Coiltronics UP1B-150 15 0.175 1.5 5.0
Coiltronics UP1B-220 22 0.254 1.2 5.0
Murata LQH4N100 10 0.560 0.4 2.6
Murata LQH4N220 22 0.560 0.4 2.6
Sumida CD43-8R2 8.2 0.132 1.26 3.2
Sumida CD43-100 10 0.182 1.15 3.2
Sumida CD54-100 10 0.100 1.44 4.5
Sumida CD54-180 18 0.150 1.23 4.5
Sumida CD54-220 22 0.180 1.11 4.5
Maxim Integrated
11
MAX1674/MAX1675/MAX1676