音影先锋亚洲天堂网|电影世界尽头的爱完整版播放|国产 熟女 91|高清无码免费观看欧美日韩|韩国一区二区三区黄色录像|美女亚洲加勒比在线|亚洲综合网 开心五月|7x成人在线入口|成人网站免费日韩毛片区|国产黄片?一级?二级?三级

LT1432 Datasheet

  • LT1432

  • 5V High Efficiency Step-Down Switching Regulator Controller

  • 609.32KB

  • 28頁

  • LINER

掃碼查看芯片數(shù)據(jù)手冊

上傳產(chǎn)品規(guī)格書

PDF預(yù)覽

LT1432
5V High Efficiency Step-Down
Switching Regulator Controller
FEATURES
s
s
s
s
s
s
s
s
DESCRIPTIO
Accurate Preset +5V Output
Up to 90% Efficiency
Optional Burst Mode for Light Loads
Can be Used with Many LTC Switching ICs
Accurate Ultra-Low-Loss Current Limit
Operates with Inputs from 6V to 30V
Shutdown Mode Draws Only 15碌A(chǔ)
Uses Small 50碌H Inductor
The LT1432 is a control chip designed to operate with the
LT1170/LT1270 family of switching regulators to make a
very high efficiency 5V step-down (buck) switching regula-
tor. A minimum of external components is needed.
Included is an accurate current limit which uses only 60mV
sense voltage and uses 鈥渇ree鈥?PC board trace material for
the sense resistor. Logic controlled electronic shutdown
mode draws only 15碌A(chǔ) battery current. The switching
regulator operates down to 6V input.
The LT1432 has a logic controlled 鈥渂urst鈥?mode to achieve
high efficiency at very light load currents (0 to 100mA) such
as memory keep-alive. In normal switching mode, the
standby power loss is about 60mW, limiting efficiency at
light loads. In burst mode, standby loss is reduced to
approximately 15mW. Output current in this mode is
typically in the 5mA to 100mA range.
The LT1432 is available in 8-pin surface mount and DIP
packages. The LT1170/LT1270 family will also be available
in a surface mount version of the 5-pin TO-220 package.
For 3.3V versions contact Linear Technology Corporation.
APPLICATI
s
s
s
s
S
Laptop and Palmtop Computers
Portable Data-Gathering Instruments
DC Bus Distribution Systems
Battery-Powered Digital Widgets
TYPICAL APPLICATI
V
IN
+
V
SW
C1
330碌F
35V
C6
0.02碌F
R1
680鈩?/div>
C4
0.1碌F
D1
MBR330p
C5
0.03碌F
FB
V
C
LT1170
LT1271
V
IN
10碌H
3A
100碌F
16V
+
GND
D2
1N4148
OPTIONAL
OUTPUT
FILTER
L1
50碌H
R2*
0.013鈩?/div>
+
V
C
V
IN
LT1432
DIODE
V
+
脳
C2
390碌F
16V
V
OUT
5V
3A**
EFFICIENCY (%)
C3
4.7碌F
TANT
+
V
LIM
V
OUT
MODE LOGIC
220pF
<0.3V = NORMAL MODE
>2.5V = SHUTDOWN
OPEN = BURST MODE
MODE
GND
* R2 IS MADE FROM PC BOARD
COPPER TRACES.
** MAXIMUM CURRENT IS DETERMINED
BY THE CHOICE OF LT1070 FAMILY.
SEE APPLICATION SECTION.
LT1432 TA01
Figure 1. High Efficiency 5V Buck Converter
U
Efficiency
100
NORMAL MODE
(USE AMPS SCALE)
90
80
BURST MODE
(USE mA SCALE)
70
LT1271, L = 50碌H
60
0
0
1A
20mA
2A
40mA
3A
60mA
LT1432 TA02
UO
UO
1

LT1432相關(guān)型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Sharp Electrionic Components [Hall Voltage 160mV Thin-Type ...
    SHARP
  • 英文版
    Seoul Semiconductor [INFRARED LAMP LED]
    SEOUL
  • 英文版
    Sharp Electrionic Components [Hall Voltage 160mV Thin-Type ...
    SHARP
  • 英文版
    Seoul Semiconductor [GREEN OVAL LAMP LED]
    SEOUL
  • 英文版
    Single Supply, Dual Precision Op Amp
    LINER
  • 英文版
    Single Supply, Dual Precision Op Amp
    Linear
  • 英文版
    Single Supply, Dual Precision Op Amp
    Linear
  • 英文版
    Isolated Flyback Switching Regulator with 5V Output
    Linear
  • 英文版
    Isolated Flyback Switching Regulator
    LINER
  • 英文版
    Isolated Flyback Switching Regulator
    Linear
  • 英文版
    Isolated Flyback Switching Regulator
    Linear
  • 英文版
    Isolated Flyback Switching Regulator with 5V Output
    Linear
  • 英文版
    Programmable Reference
    LINER
  • 英文版
    Programmable Reference
    Linear
  • 英文版
    5V High Efficiency Step-Down Switching Regulator Controller
    LINER
  • 英文版
    5V High Efficiency Step-Down Switching Regulator Controller
    Linear
  • 英文版
    Linear Technology [4.5A, 500kHz Step-Down Switching Regulat...
    LINER
  • 英文版
    Dot Matrix LED Unit for Outdoor Use (Lamp Type)
    SHARP
  • 英文版
  • 英文版
    Sharp Electrionic Components [Dot Matrix LED Unit for Indoo...
    SHARP

掃碼下載APP，
一鍵連接廣大的電子世界。

在線人工客服

買家服務(wù)：
賣家服務(wù)：
技術(shù)客服：

0571-85317607

網(wǎng)站技術(shù)支持

13606545031

客服在線時間周一至周五
9:00-17:30

關(guān)注官方微信號，
第一時間獲取資訊。

建議反饋

聯(lián)系人：

聯(lián)系方式：

按住滑塊，拖拽到最右邊
>>
感謝您向阿庫提出的寶貴意見，您的參與是維庫提升服務(wù)的動力！意見一經(jīng)采納，將有感恩紅包奉上哦！