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LT1108CS8-12#PBF

Description
Switching RegulatorMicropower DC/DC Converter Adjustable and Fixed 5V, 12V
CategoryPower/power management    The power supply circuit   
File Size233KB,13 Pages
ManufacturerADI
Websitehttps://www.analog.com
Environmental Compliance
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LT1108CS8-12#PBF Overview

Switching RegulatorMicropower DC/DC Converter Adjustable and Fixed 5V, 12V

LT1108CS8-12#PBF Parametric

Parameter NameAttribute value
Brand NameAnalog Devices Inc
Is it lead-free?Contains lead
Is it Rohs certified?conform to
MakerADI
package instructionSOP,
Contacts8
Manufacturer packaging code05-08-1610 (S8)
Reach Compliance Codecompliant
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeVOLTAGE-MODE
Control TechnologyPULSE FREQUENCY MODULATION
Maximum input voltage30 V
Minimum input voltage2 V
JESD-30 codeR-PDSO-G8
JESD-609 codee3
length4.9 mm
Humidity sensitivity level1
Number of functions1
Number of terminals8
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current1.5 A
Nominal output voltage12 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)260
Certification statusNot Qualified
Maximum seat height1.75 mm
surface mountYES
Switch configurationSINGLE
Maximum switching frequency19 kHz
technologyBIPOLAR
Temperature levelCOMMERCIAL
Terminal surfaceMATTE TIN
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature30
width3.9 mm
Base Number Matches1
LT1108
Micropower
DC/DC Converter
Adjustable and Fixed 5V, 12V
FEATURES
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s
DESCRIPTIO
Operates at Supply Voltages from 2V to 30V
Consumes Only 110µA Supply Current
Works in Step-Up or Step-Down Mode
Only Four External Components Required
Low Battery Detector Comparator On-Chip
User Adjustable Current Limit
Internal 1A Power Switch
Fixed or Adjustable Output Voltage Versions
Space Saving 8-Pin MiniDIP or S8 Package
The LT1108 is a versatile micropower DC/DC converter.
The device requires only four external components to
deliver a fixed output of 5V or 12V. Supply voltage ranges
from 2V to 12V in step-up mode and to 30V in step-down
mode. The LT1108 functions equally well in step-up, step-
down, or inverting applications.
The LT1108 is pin-for-pin compatible with the LT1173, but
has a duty cycle of 70%, resulting in increased output
current in many applications. The LT1108 can deliver
150mA at 5V from a 2 AA cell input and 5V at 300mA from
9V in step-down mode. Quiescent current is just 110µA,
making the LT1108 ideal for power conscious battery-
operated systems.
Switch current limit can be programmed with a single
resistor. An auxiliary gain block can be configured as a low
battery detector, linear post regulator, undervoltage lock-
out circuit, or error amplifier.
APPLICATI
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Palmtop Computers
3V to 5V, 5V to 12V Converters
9V to 5V, 12V to 5V Converters
LCD Bias Generators
Peripherals and Add-On Cards
Battery Backup Supplies
Cellular Telephones
Portable Instruments
TYPICAL APPLICATI
Palmtop Computer Logic Supply
L1*
100µH
47Ω
I
LIM
2
×
AA
CELLS
V
IN
SW1
EFFICIENCY (%)
84
1N5817
5V
150mA
82
80
78
76
74
72
70
V
IN
= 3V
V
IN
= 2.5V
V
IN
= 2V
+
100µF
+
LT1108-5
SENSE
GND
SW2
AVX
TPS
330µF
6.3V
*L1 = GOWANDA GA20-103K
COILTRONICS CTX100-4
SUMIDA CD105-101K
LT1108 • TA01
U
Efficiency
1
10
100
LOAD CURRENT (mA)
LT1108 • TA02
UO
UO
1

LT1108CS8-12#PBF Related Products

LT1108CS8-12#PBF LT1108CS8#TR LT1108CS8-5#TR
Description Switching RegulatorMicropower DC/DC Converter Adjustable and Fixed 5V, 12V Switching Regulator LT1108 - Micropower DC/DC Converter Adjustable and Fixed 5V, 12V Switching Regulator LT1108 - Micropower DC/DC Converter Adjustable and Fixed 5V, 12V
Maker ADI ADI ADI
Maximum input voltage 30 V 12 V 12 V
Minimum input voltage 2 V 2 V 2 V
Product Category - switching regulator switching regulator
RoHS - N N
Installation style - SMD/SMT SMD/SMT
Package/box - SO-8 SO-8
Output current - 0.8 A 0.8 A
series - LT1108 LT1108
high - 1.75 mm 1.75 mm
Working power current - 0.11 mA 0.11 mA
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