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LT1107IS8-5

Description
IC 1.5 A SWITCHING REGULATOR, 77 kHz SWITCHING FREQ-MAX, PDSO8, 0.150 INCH, PLASTIC, SOP-8, Switching Regulator or Controller
CategoryPower/power management    The power supply circuit   
File Size207KB,16 Pages
ManufacturerLinear ( ADI )
Websitehttp://www.analog.com/cn/index.html
Download Datasheet Parametric View All

LT1107IS8-5 Overview

IC 1.5 A SWITCHING REGULATOR, 77 kHz SWITCHING FREQ-MAX, PDSO8, 0.150 INCH, PLASTIC, SOP-8, Switching Regulator or Controller

LT1107IS8-5 Parametric

Parameter NameAttribute value
Is it lead-free?Contains lead
Is it Rohs certified?incompatible
MakerLinear ( ADI )
Parts packaging codeSOIC
package instructionSOP,
Contacts8
Reach Compliance Codecompliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
Maximum input voltage30 V
Minimum input voltage2 V
Nominal input voltage3 V
JESD-30 codeR-PDSO-G8
JESD-609 codee0
length4.9025 mm
Number of functions1
Number of terminals8
Maximum operating temperature85 °C
Minimum operating temperature-40 °C
Maximum output current1.5 A
Nominal output voltage5 V
Package body materialPLASTIC/EPOXY
encapsulated codeSOP
Package shapeRECTANGULAR
Package formSMALL OUTLINE
Peak Reflow Temperature (Celsius)255
Certification statusNot Qualified
Maximum seat height1.752 mm
surface mountYES
Switch configurationBOOST
Maximum switching frequency77 kHz
Temperature levelINDUSTRIAL
Terminal surfaceTIN LEAD
Terminal formGULL WING
Terminal pitch1.27 mm
Terminal locationDUAL
Maximum time at peak reflow temperature40
width3.899 mm
LT1107
Micropower
DC/DC Converter
Adjustable and Fixed 5V, 12V
FEATURES
s
s
s
s
s
s
s
s
s
DESCRIPTIO
Operates at Supply Voltages from 2V to 30V
Consumes Only 320µA Supply Current
Works in Step-Up or Step-Down Mode
Only Three 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 SO-8 Package
The LT
®
1107 is a versatile micropower DC/DC converter.
The device requires only three 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 LT1107 functions equally well in step-up, step-
down, or inverting applications.
The LT1107 is pin-for-pin compatible with the LT1111, but
has a duty cycle of 70%, resulting in increased output
current in many applications. The LT1107 can deliver
150mA at 5V from a 2AA cell input and 5V at 300mA from
24V in step-down mode. Quiescent current is just 320µA,
making the LT1107 ideal for power-conscious battery-
operated systems. The 63kHz oscillator is optimized to
work with surface mount inductors and capacitors.
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.
, LTC and LT are registered trademarks of Linear Technology Corporation
APPLICATIO S
s
s
s
s
s
s
s
s
Palmtop Computers
3V to 5V, 5V to 12V Converters
24V to 5V, 12V to 5V Converters
LCD Bias Generators
Peripherals and Add-On Cards
Battery Backup Supplies
Cellular Telephones
Portable Instruments
TYPICAL APPLICATIO
Palmtop Computer Logic Supply
L1*
33µH
MBRS120T3
5V
150mA
82
80
78
V
IN
= 3V
47Ω
EFFICIENCY (%)
76
74
72
70
68
66
I
LIM
2
×
AA
ALKALINE
CELLS
V
IN
SW1
+
47µF
LT1107-5
+
100µF
SENSE
GND
SW2
* SUMIDA CD54-330K
COILCRAFT DT3316-473
64
1107 TA01
U
Efficiency
V
IN
= 2V
V
IN
= 2.5V
1
10
100
LOAD CURRENT (mA)
400
1107 TA02
U
U
1107fa
1
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