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LT1107IS8 Datasheet

  • LT1107IS8

  • DC to DC Converter

  • 208.22KB

  • 16頁

  • ETC

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LT1107
Micropower
DC/DC Converter
Adjustable and Fixed 5V, 12V
FEATURES
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DESCRIPTIO
Operates at Supply Voltages from 2V to 30V
Consumes Only 320碌A 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
廬
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 320碌A,
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
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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*
33碌H
MBRS120T3
5V
150mA
82
80
78
V
IN
= 3V
47鈩?/div>
EFFICIENCY (%)
76
74
72
70
68
66
I
LIM
2
脳
AA
ALKALINE
CELLS
V
IN
SW1
+
47碌F
LT1107-5
+
100碌F
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

LT1107IS8 產(chǎn)品屬性

  • LT1107

  • 100

  • 集成電路 (IC)

  • PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器

  • -

  • 降壓（降壓），升壓（升壓），反相

  • 可調式

  • 1

  • 可調

  • 2 V ~ 30 V

  • -

  • 63kHz

  • 400mA

  • 無

  • -45°C ~ 85°C

  • 表面貼裝

  • 8-SOIC（0.154"，3.90mm 寬）

  • 管件

  • 8-SOIC

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