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LT1173CN8-12 Datasheet

  • LT1173CN8-12

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

  • 16頁

  • LINER

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LT1173
Micropower
DC/DC Converter
Adjustable and Fixed 5V, 12V
FEATURES
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DESCRIPTIO
Operates at Supply Voltages From 2.0V to 30V
Consumes Only 110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 SO8 Package
The LT1173 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 2.0V to 12V in step-up mode and to 30V in step-down
mode. The LT1173 functions equally well in step-up, step-
down or inverting applications.
The LT1173 consumes just 110碌A supply current at
standby, making it ideal for applications where low quies-
cent current is important. The device can deliver 5V at
80mA from a 3V input in step-up mode or 5V at 200mA
from a 12V input in step-down mode.
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, under voltage lock-
out circuit or error amplifier.
For input sources of less than 2V, use the LT1073.
APPLICATI
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Flash Memory Vpp Generators
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
Laptop and Palmtop Computers
Cellular Telephones
Portable Instruments
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
TYPICAL APPLICATI
L1*
100碌H
5V
IN
47鈩?/div>
I
LIM
10
碌
F
V
IN
SW1
S
VPP Output
12V
100mA
Logic Controlled Flash Memory VPP Generator
1N5818
V
OUT
5V/DIV
1.07M
鈥?/div>
+
+
LT1173
FB
SW2
SANYO
OS-CON
100
碌
F
0V
GND
124k
鈥?/div>
PROGRAM
5V/DIV
5ms/DIV
1173 TA02
1N4148
PROGRAM
LT1173 鈥?TA01
*L1 = GOWANDA GA20-103K
COILTRONICS CTX100-4
NO OVERSHOOT
EFFICIENCY = 81%
鈥?/div>
= 1% METAL FILM
U
UO
UO
1

LT1173CN8-12 產(chǎn)品屬性

  • LT1173

  • 50

  • 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

  • 固定

  • 1

  • 12V

  • 2 V ~ 30 V

  • -

  • 23kHz

  • 400mA

  • 無

  • 0°C ~ 70°C

  • 通孔

  • 8-DIP（0.300"，7.62mm）

  • 管件

  • 8-PDIP

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