EEWORLDEEWORLDEEWORLD

Part Number

Search

LT1947EMSE#TR

Description
Switching Voltage Regulators LT1947 - Adjustable Output TFT-LCD Triple Switching Regulator
CategoryPower/power management    The power supply circuit   
File Size175KB,12 Pages
ManufacturerADI
Websitehttps://www.analog.com
Download Datasheet Parametric Compare View All

LT1947EMSE#TR Overview

Switching Voltage Regulators LT1947 - Adjustable Output TFT-LCD Triple Switching Regulator

LT1947EMSE#TR Parametric

Parameter NameAttribute value
Is it Rohs certified?incompatible
MakerADI
package instructionHTSSOP,
Reach Compliance Codenot_compliant
ECCN codeEAR99
Analog Integrated Circuits - Other TypesSWITCHING REGULATOR
control modeCURRENT-MODE
Maximum input voltage8 V
Minimum input voltage2.7 V
Nominal input voltage3.3 V
JESD-30 codeS-PDSO-G10
JESD-609 codee0
length3 mm
Humidity sensitivity level1
Number of functions1
Number of terminals10
Maximum operating temperature70 °C
Minimum operating temperature
Maximum output current2 A
Package body materialPLASTIC/EPOXY
encapsulated codeHTSSOP
Package shapeSQUARE
Package formSMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius)235
Certification statusNot Qualified
Maximum seat height1.1 mm
surface mountYES
Switch configurationBOOST
Maximum switching frequency3500 kHz
Temperature levelCOMMERCIAL
Terminal surfaceTin/Lead (Sn/Pb)
Terminal formGULL WING
Terminal pitch0.5 mm
Terminal locationDUAL
Maximum time at peak reflow temperature20
width3 mm
Base Number Matches1
LT1947
Adjustable Output TFT-LCD
Triple Switching Regulator
FEATURES
DESCRIPTIO
Complete Solution Under 1.2mm
Develops Three Outputs from a 3.3V or 5V Supply
Externally Programmable V
ON
Delay
Fixed Frequency Low Noise Outputs
All Ceramic Capacitors
3MHz Switching Frequency
Fast Transient Response
Few External Components Required
2.7V to 8V Input Range
Adjustable AV
DD
and V
ON
Voltages
Tiny 10-Lead MSOP and Thermally Enhanced
10-Lead MSOP Packages
APPLICATIO S
TFT-LCD Notebook Display Panels
TFT-LCD Desktop Monitor Display Panels
Digital Cameras
Handheld Computers
The LT
®
1947 is a highly integrated multiple output DC/DC
converter designed for use in TFT-LCD panels. The device
contains two independent switching regulators. The main
regulator has an adjustable output voltage with an internal
1.1A switch that can generate a boosted voltage as high as
30V. The second regulator’s output is also adjustable up
to 30V and can deliver 10mA for positive bias. A simple
level-shift charge pump off the main switch node gener-
ates the negative bias voltage. An external capacitor sets
the delay time from AV
DD
’s final value to the rising edge at
the V
ON
pin. The 3MHz switching frequency allows the use
of tiny low profile chip inductors and capacitors through-
out, providing a low noise, low cost total solution with all
components under 1.2mm in height. The device operates
from an input range of 2.7V to 8V and is available in
10-lead MSOP and thermally enhanced 10-lead MSOP
packages.
, LTC and LT are registered trademarks of Linear Technology Corporation.
All other trademarks are the property of their respective owners.
TYPICAL APPLICATIO
D3
D4
L1
3.3µH
V
IN
L2
4.7µH
C1
2.2µF
CERAMIC
C6
0.68µF
D1
V
IN
SW2
SW1
FB1
C4
0.68µF
CERAMIC
AV
DD
8V
200mA
R1
53.6k
C2
3.3µF
CERAMIC
×2
V
SHDN
5V/DIV
V
ON
20V/DIV
V
OFF
–8V
10mA
D2
V
O2
C3
220nF
R3
182k
FB2
R4
10k
SHDN C
T
C5
10nF
D1: MBRM120LT3
D2: CMDSH-3
D3, D4: BAT54S DUAL DIODE
L1: SUMIDA CLQ4D103R3
L2: TAIYO YUDEN LB2012B4R7M
V
ON
GND
LT1947
R2
10k
V
ON
24V
10mA
AV
DD
10V/DIV
SHUTDOWN
V
OFF
10V/DIV
1947 F01
C1: TAIYO YUDEN LMK316BJ225MD
C2: TAIYO YUDEN LMK325BJ335MD
×2
C3: AVX 0.22µF 25V X7R
C4, C6: TAIYO YUDEN LMK107BJ684MA
Figure 1. 3.3V Powered TFT-LCD Bias Generator
1947fa
U
Start-Up Waveforms
2ms/DIV
1947 TA01.tif
U
U
1

LT1947EMSE#TR Related Products

LT1947EMSE#TR LT1947EMS#TR
Description Switching Voltage Regulators LT1947 - Adjustable Output TFT-LCD Triple Switching Regulator Switching Voltage Regulators LT1947 - Adjustable Output TFT-LCD Triple Switching Regulator
Is it Rohs certified? incompatible incompatible
Maker ADI ADI
package instruction HTSSOP, TSSOP,
Reach Compliance Code not_compliant not_compliant
ECCN code EAR99 EAR99
Analog Integrated Circuits - Other Types SWITCHING REGULATOR SWITCHING REGULATOR
control mode CURRENT-MODE CURRENT-MODE
Maximum input voltage 8 V 8 V
Minimum input voltage 2.7 V 2.7 V
Nominal input voltage 3.3 V 3.3 V
JESD-30 code S-PDSO-G10 S-PDSO-G10
JESD-609 code e0 e0
length 3 mm 3 mm
Humidity sensitivity level 1 1
Number of functions 1 1
Number of terminals 10 10
Maximum operating temperature 70 °C 70 °C
Maximum output current 2 A 2 A
Package body material PLASTIC/EPOXY PLASTIC/EPOXY
encapsulated code HTSSOP TSSOP
Package shape SQUARE SQUARE
Package form SMALL OUTLINE, HEAT SINK/SLUG, THIN PROFILE, SHRINK PITCH SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
Peak Reflow Temperature (Celsius) 235 235
Certification status Not Qualified Not Qualified
Maximum seat height 1.1 mm 1.1 mm
surface mount YES YES
Switch configuration BOOST BOOST
Maximum switching frequency 3500 kHz 3500 kHz
Temperature level COMMERCIAL COMMERCIAL
Terminal surface Tin/Lead (Sn/Pb) Tin/Lead (Sn/Pb)
Terminal form GULL WING GULL WING
Terminal pitch 0.5 mm 0.5 mm
Terminal location DUAL DUAL
Maximum time at peak reflow temperature 20 20
width 3 mm 3 mm
Base Number Matches 1 1
The world's first robot suicide (with such a title)
[url=http://world.people.com.cn/n/2013/1115/c157278-23554455.html]http://world.people.com.cn/n/2013/1115/c157278-23554455.html[/url] [color=rgb(51, 51, 51)][font=SimSun]Title: The world's first robot ...
wangfuchong Robotics Development
Software version self-description
[i=s]This post was last edited by lzwml on 2016-6-10 17:58[/i] [font=宋体][size=4][b]#Software version self-description[/b][/size][/font] [font=宋体] [/font] [font=宋体]Usually, the running version of a pro...
lzwml Embedded System
How to use git
I used to only use svn, but now I'm using Android. How can I not use the advanced git? Come on, let's play with git. 1. Install gitsudo apt-get install git[color=#666666]You can install Git directly, ...
Wince.Android Embedded System
Why can't I call modelsim?
I installed quartus web version 10.1 and modelsim 6.5. But when I call modelsim 6.5, it doesn't start. I have set the environment variables and paths in win7. It starts in XP with the same settings. A...
wangpiaoke FPGA/CPLD
Using efficient MicroSiP power modules to miniaturize ultrasonic smart probes
In recent years, with the improvement of residents' health awareness, the demand for ultrasound testing has increased. In the traditional ultrasound testing scenario, the examinee must wait in line ne...
alan000345 Analogue and Mixed Signal
Intelligent wireless charging management system
[i=s]This post was last edited by JaneConan on 2018-9-23 22:38[/i] [font=宋体][size=17px]First of all, I would like to thank Electronic Engineering World and GigaDevice for organizing the event. [/size]...
JaneConan GD32 MCU

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1792  428  1660  1553  2812  37  9  34  32  57 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号