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LT1173CN8-5#PBF 数据手册 - Linear Technology（凌力尔特）
制造商:
Linear Technology（凌力尔特）
分类:
稳压芯片
封装:
PDIP-8
描述:
Linear Technology 的各种高效直流 - 直流转换器可作为升压（增压）调节器、降压（减压）调节器或反相调节器。 这些高度集成设备只需极少的外部元件，即可提供全面的调节器功能和多种组合功能，如微功耗操作、低电量检测、可调电流限制以及关闭/启用输入。### 开关电压调节器，Linear Technology**Linear Technology** 的同步型和非同步型内部开关调节器 IC 产品系列效率高、输入电压范围广、且开关频率高达 4 MHz。 该系列控制器包括多种配置：从降压（下降），升压（上压）、降压-升压、正向、隔离、反相和反激控制器。 反激、正向和隔离控制器（一次侧和二次侧）提供解决方案，帮助更换背板型电源转换中使用的直流/直流砖型转换器。
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LT1173CN8-5#PBF数据手册
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LT1173
1
Micropower
DC/DC Converter
Adjustable and Fixed 5V, 12V
V
OUT
5V/DIV
0V
PROGRAM
5V/DIV
5ms/DIV
1173 TA02
L1*
100µH
LT1173 • TA01
+
GND SW2
FB
SW1
LIM
I
IN
V
LT1173
10 F
SANYO
OS-CON
100 F
µ
12V
100mA
1N5818
µ
+
5V
IN
1N4148
PROGRAM
47Ω
*L1 = GOWANDA GA20-103K
COILTRONICS CTX100-4
1.07M
†
124k
†
NO OVERSHOOT
EFFICIENCY = 81%
†
= 1% METAL FILM
Logic Controlled Flash Memory VPP Generator
VPP Output
D
U
ESCRIPTIO
S
F
EA
T
U
RE
U
S
A
O
PP
L
IC
AT
I
and LTC are registered trademarks and LT is a trademark of Linear Technology Corporation.
■
Operates at Supply Voltages From 2.0V to 30V
■
Consumes Only 110µA 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 110µA 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.
■
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
U
SA
O
PP
L
IC
AT
ITY
P
I
CA
L
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