LTC1174HVCN8 Linear Technology, LTC1174HVCN8 Datasheet - Page 12

• Manufacturer Part Number: LTC1174HVCN8
• Description: IC DC/DC CONV STP-DWN&INVRT 8DIP
• Manufacturer: Linear Technology
• Type: Step-Down (Buck), Invertingr

Specifications of LTC1174HVCN8

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.25 ~ 18 V
• Current - Output: 1A
• Frequency - Switching: 200kHz
• Voltage - Input: 4 ~ 18.5 V
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Through Hole
• Package / Case: 8-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Power - Output: -

APPLICATIO S I FOR ATIO
LTC1174
LTC1174-3.3/LTC1174-5
Solving for L in the above equation and with V
L = 44.8µH. The next higher standard value of L is 50µH
(example: Coiltronics CTX50-4). The operating frequency,
neglecting voltage across diode V
With the value of L determined, the requirements for C
and C
should be at least:
For C
12
I
I
f
RMS
RMS
≈
=
OUT
OUT
2 5 10 1
111
. •
=
≈
=
=
, the RMS current rating should be at least:
are calculated. For C
kHz
I
I
174
300
OUT
PEAK
2
5
mA
mA
[
⎛
⎜
⎝
V
OUT
−
U
(
V
A
(
V
OUT
RMS
V
V
IN
IN
IN
U
⎞
⎟
⎠
−
)
V
OUT
IN
, its RMS current rating
)
D
]
1 2
W
/
is:
(
A
RMS
U
D
)
= 0.6V,
IN
Now allow V
the operating frequency will decrease. The new frequency
is 42kHz.
Table 1. Inductor Manufacturers
MANUFACTURER
Coilcraft
1102 Silver Lake Road
Cary, IL 60013
[phone]
Coiltronics Inc.
6000 Park of Commerce Blvd.
Boca Raton, FL 33487
[phone]
Gowanda Electronics Corporation
1 Industrial Place
Gowanda, NY 14070
[phone]
Sumida Electric Co. Ltd.
637 E. Golf Road, Suite 209
Arlington Heights, IL 60005
[phone]/7
Table 2. Capacitor Manufacturers
MANUFACTURER
AVX Corporation
P.O. Box 887
Myrtle Beach, SC 29578
[phone]
Nichicon America Corporation
927 East State Parkway
Schaberg, IL 60173
[phone]
Sanyo Video Components
2001 Sanyo Avenue
San Diego, CA 92173
[phone]
Attn: Sales Dept.
IN
to drop to 6V. At this minimum input voltage
PART NUMBER
DT3316 Series
Econo-Pac
Octa-Pac
GA10 Series
CD 54 Series
CD 75 Series
PART NUMBER
TPS Series
TAJ Series
PL Series
OS-CON Series
1174fe