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LT1107CN8 Datasheet

  • LT1107CN8

  • Micropower DC/DC Converter Adjustable and Fixed 5V, 12V

  • 12頁

  • LINER

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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(chǔ) 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 LT1107 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(chǔ),
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.
APPLICATI
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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 APPLICATI
Palmtop Computer Logic Supply
L1*
33碌H
MBRS120T3
5V
150mA
82
80
78
47鈩?/div>
I
LIM
2
脳
AA
ALKALINE CELLS
V
IN
SW1
47碌F
LT1107-5
SENSE
GND
SW2
EFFICIENCY (%)
76
74
72
70
68
66
+
+
100碌F
* SUMIDA CD54-330K
COILCRAFT DT3316-473
64
1107 TA01
U
Efficiency
V
IN
= 3V
V
IN
= 2V
V
IN
= 2.5V
1
10
100
LOAD CURRENT (mA)
400
1107 TA02
UO
UO
1

LT1107CN8 產(chǎn)品屬性

  • LT1107

  • 50

  • 集成電路 (IC)

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

  • -

  • 降壓（降壓），升壓（升壓），反相

  • 可調(diào)式

  • 1

  • 可調(diào)

  • 2 V ~ 30 V

  • -

  • 63kHz

  • 400mA

  • 無

  • 0°C ~ 70°C

  • 通孔

  • 8-DIP（0.300"，7.62mm）

  • 管件

  • 8-PDIP

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