LTC1871IMS-7#TRPBF Linear Technology, LTC1871IMS-7#TRPBF Datasheet - Page 18

• Manufacturer Part Number: LTC1871IMS-7#TRPBF
• Description: IC CONTRLR CURRENT MODE 10-MSOP
• Manufacturer: Linear Technology
• Type: Step-Up (Boost), Flyback, Sepicr

Specifications of LTC1871IMS-7#TRPBF

• Internal Switch(s): No
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.23 ~ 36 V
• Current - Output: 50mA
• Frequency - Switching: 50kHz ~ 1MHz
• Voltage - Input: 6 ~ 36 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 10-MSOP, Micro10™, 10-uMAX, 10-uSOP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -

LTC1871-7
APPLICATIONS INFORMATION
Please note that the input capacitor can see a very high
surge current when a battery is suddenly connected to
the input of the converter and solid tantalum capacitors
can fail catastrophically under these conditions. Be sure
to specify surge-tested capacitors!
Burst Mode Operation and Considerations
The choice of sense resistor and inductor value also deter-
mines the load current at which the LTC1871-7 enters Burst
Mode operation. When bursting, the controller clamps the
peak inductor current to approximately:
18
I
BURST(PEAK)
Table 1. Recommended Component Manufacturers
VENDOR
AVX
BH Electronics
Coilcraft
Coiltronics
Diodes, Inc
Fairchild
General Semiconductor
International Rectifi er
IRC
Kemet
Magnetics Inc
Microsemi
Murata-Erie
Nichicon
On Semiconductor
Panasonic
Sanyo
Sumida
Taiyo Yuden
TDK
Thermalloy
Tokin
Toko
United Chemicon
Vishay/Dale
Vishay/Siliconix
Vishay/Sprague
Zetex
=
R
30mV
SENSE
Inductors, Transformers
Small-Signal Discretes
Inductors, Capacitors
Capacitors, Inductors
Tantalum Capacitors
MOSFETs, Diodes
Sense Resistors
COMPONENTS
Toroid Cores
Capacitors
Capacitors
Capacitors
Capacitors
Capacitors
Heat Sinks
Capacitors
Capacitors
Capacitors
Inductors
Inductors
MOSFETs
Inductors
Inductors
Resistors
MOSFETs
Diodes
Diodes
Diodes
Diodes
which represents about 20% of the maximum 150mV
SENSE pin voltage. The corresponding average current
depends upon the amount of ripple current. Lower inductor
values (higher ΔI
Burst Mode operations begins, since it is the peak current
that is being clamped.
The output voltage ripple can increase during Burst
Mode operation if ΔI
This can occur if the input voltage is very low or if a very
large inductor is chosen. At high duty cycles, a skipped
cycle causes the inductor current to quickly decay to
zero. However, because ΔI
cycles for the current to ramp back up to I
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L
) will reduce the load current at which
L
generalsemiconductor.com
is substantially less than I
nec-tokinamerica.com
aavidthermalloy.com
component.tdk.com
bhelectronics.com
fairchildsemi.com
chemi-com.com
WEB ADDRESS
coiltronics.com
microsemi.com
L
panasonic.com
nichicon.com
coilcraft.com
mag-inc.com
avxcorp.com
murata.co.jp
onsemi.com
sumida.com
t-yuden.com
tokoam.com
diodes.com
sanyo.co.jp
vishay.com
vishay.com
vishay.com
kemet.com
zetex.com
is small, it takes multiple
irctt.com
irf.com
BURST(PEAK)
BURST
18717fc
.
.