3
DEMO MANUAL DC194
MICROPOWER BOOST REGULATOR
PARTS LIST
REFERENCE
DESIGNATOR
QUANTITY
PART NUMBER
DESCRIPTION
VENDOR
TELEPHONE
C1
1
TPSB226M010R0700
22
µ
F 10V 20% Tantalum Capacitor
AVX
(207) 282-5111
C2
1
TPSC107M006R0150
100
µ
F 6.3V 20% Tantalum Capacitor
AVX
(207) 282-5111
C3
1
0805YG332KAT2
3300pF 16V Y5V 0805 Capacitor
AVX
(843) 946-0362
C4
1
08053G104KAT2
0.1
µ
F 25V Y5V 0805 Capacitor
AVX
(843) 946-0362
C5
1
0805YG101KAT2
100pF 16V Y5V 0805 Capacitor
AVX
(843) 946-0362
D1
1
MBR0520LT1
20V 0.5A SOD123 Schottky Diode
Motorola
(800) 441-2447
L1
1
CD43-100MC
10
µ
H CD43 Inductor
Sumida
(847) 956-0666
R1A
1
CR10-6043F-T
604k 1/10W 1% 0805 Resistor
TAD
(800) 508-1521
R1B
1
CR10-3323F-T
332k 1/10W 1% 0805 Resistor
TAD
(800) 508-1521
R2
1
CR10-1004F-T
1M 1/10W 1% 0805 Resistor
TAD
(800) 508-1521
R3
1
CR10-333J-T
33k 1/8W 5% 0805 Resistor
TAD
(800) 508-1521
R4 (Optional)
1
CR18-104J-T
100k 1/8W 5% 1206 Resistor
TAD
(714) 255-9123
R5 to R7 (Optional)
3
CR18-XXXJ-T
XXX 1/8W 5% 1206 Resistor
TAD
(714) 255-9123
JP1
1
3801S-03-G1
3-Pin Header, 0.1
"
Center
Comm
(626) 301-4200
1
CCIJ230-G
SHUNT FOR JP1
Comm
(626) 301-4200
U1
1
LT1317CMS8, MSOP
LTHA DC/DC Converter Version A
LTC
(408) 432-1900
LT1317BCMS8, MSOP
LTHB DC/DC Converter Version B
QUICK START GUIDE
DC194 can regulate a 3.3V output from an input of 1.5V
to 3.6V; it can regulate a 5V output from an input of 1.5V
to 5.3V. Select the desired output voltage by moving
jumper JP1 to the appropriate position. Apply the DC
input voltage between the V
IN
and GND terminals of the
DC194. Do not apply more than 5.5V to the input of this
circuit.
With the input supply present, the LT1317/LT1317B will
regulate the output to 3.3V or 5V. Attach a suitable load
between V
OUT
and GND.
The LT1317/LT1317B can be placed in shutdown mode
by tying the SHDN terminal to the GND terminal. For
normal operation, the SHDN terminal can be left floating
or pulled high (above 1.4V and up to V
IN
).
Note that, as with any boost regulator, there is a direct DC
path between the input and output; a shorted output will
draw large currents, possibly damaging the DC194.
