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

LTC1149-3.3 Datasheet

  • LTC1149-3.3

  • High Efficiency Synchronous Step-Down Switching Regulators

  • 20頁

  • LINER

掃碼查看芯片數(shù)據手冊

上傳產品規(guī)格書

PDF預覽

LTC1149
LTC1149-3.3/LTC1149-5
High Efficiency Synchronous
Step-Down Switching Regulators
FEATURES
s
s
s
DESCRIPTIO
s
s
s
s
s
s
s
Operation to 48V Input Voltage
Ultrahigh Efficiency: Up to 95%
Current Mode Operation for Excellent Line and
Load Transient Response
High Efficiency Maintained over Wide Current Range
Logic-Controlled Micropower Shutdown
Short-Circuit Protection
Very Low Dropout Operation: 100% Duty Cycle
Synchronous FET Switching for High Efficiency
Adaptive Nonoverlap Gate Drives
Available in 16-Pin Narrow SO Package
The LTC
廬
1149 series is a family of synchronous step-
down switching regulator controllers featuring automatic
Burst Mode
TM
operation to maintain high efficiencies at
low output currents. These devices drive external comple-
mentary power MOSFETs at switching frequencies up
to 250kHz using a constant off-time current-mode archi-
tecture.
Special onboard regulation and level-shift circuitry allow
operation at input voltages from dropout to 48V (60V
absolute max). The constant off-time architecture main-
tains constant ripple current in the inductor, easing the
design of wide input range converters. Current mode
operation provides excellent line and load transient
response. The operating current level is user-program-
mable via an external current sense resistor.
The LTC1149 series incorporates automatic power saving
Burst Mode operation when load currents drop below the
level required for continuous operation. Standby power is
reduced to only about 8mW at V
IN
= 12V. In shutdown,
both MOSFETs are turned off.
APPLICATI
s
s
s
s
s
s
S
Notebook and Palmtop Computers
Portable Instruments
Battery-Operated Digital Devices
Industrial Power Distribution
Avionics Systems
Telecom Power Supplies
, LTC and LT are registered trademarks of Linear Technology Corporation.
Burst Mode is a trademark of Linear Technology Corporation.
TYPICAL APPLICATI
1N4148
CAP
0.068碌F
V
IN
V
IN
1N4148
PGATE
PDRIVE
0.047碌F
D1
1N5819
P-CHANNEL
IRFR9024
L*
62碌H
+
C
IN
100碌F
100V
+
3.3碌F
V
CC
V
CC
EFFICIENCY (%)
R
SENSE
**
0.05鈩?/div>
LTC1149-5
0V = NORMAL
>2V = SHUTDOWN
3300碌F
1k
C
T
470pF
SHDN1
SHDN2
I
TH
C
T
SGND
SENSE
+
SENSE
鈥?/div>
NGATE
P, RGNDS
*COILTRONICS CTX62-2-MP
**KRL SL-1-C1-0R050J
1000pF
N-CHANNEL
IRFR024
V
OUT
5V/2A
+
C
OUT
220碌F
60
0.02
1149 F01
Figure 1. High Efficiency Step-Down Regulator
U
LTC1149-5 Efficiency
100
FIGURE 1 CIRCUIT
V
IN
= 12V
90
V
IN
= 24V
80
70
0.2
LOAD CURRENT (A)
2
1149 TA01
UO
UO
1

LTC1149-3.3相關型號PDF文件下載

  • 型號
    版本
    描述
    廠商
    下載
  • 英文版
    Dual Micropower Comparator
    LINER
  • 英文版
    DUAL MICROPOWER COMPARATOR
    LINER [Lin...
  • 英文版
    Dual Micropower Comparator
    LINER [Lin...
  • 英文版
    BANG-BANG Controller
    LINER
  • 英文版
    BANG-BANG Controller
    LINER [Lin...
  • 英文版
    Window Comparator
    LINER
  • 英文版
    Window Comparator
    LINER [Lin...
  • 英文版
    Window Comparator
    LINER [Lin...
  • 英文版
    2-Channel Differential Input 16-Bit No Latency DS ADC
    LINER
  • 英文版
    2-Channel Differential Input 24-Bit No Latency DS ADC
    LINER [Lin...
  • 英文版
    2-Channel Differential Input 16-Bit No Latency DS ADC
    LINER [Lin...
  • 英文版
    Dual Precision Intrumentation Switched-Capacitor Building Bl...
    LINER [Lin...
  • 英文版
    Switched Capacitor Voltage Converter
    LINER
  • 英文版
    Switched Capacitor Voltage Converter
    LINER [Lin...
  • 英文版
    Programmable Micropower Hex Translator/ Receiver/Driver
    LINER
  • 英文版
    Programmable Micropower Hex Translator/ Receiver/Driver
    LINER [Lin...
  • 英文版
    “Inductorless” 5V to + 5V Converter
    LINER
  • 英文版
    “Inductorless” 5V to + 5V Converter
    LINER [Lin...
  • 英文版
    Dual Micropower Chopper Stabilized Operational Amplifier wit...
    LINER
  • 英文版
    Dual Micropower Zero-Drift Operational Amplifier with Intern...
    LINER [Lin...

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：
賣家服務：
技術客服：

0571-85317607

網站技術支持

13606545031

客服在線時間周一至周五
9:00-17:30

關注官方微信號，
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的動力！意見一經采納，將有感恩紅包奉上哦！