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LT1943EFE#TRPBF

厂商:
Linear
类别:
电源管理IC
包装:
-
封装:
TSSOP
无铅情况/ROHS:
无铅
描述:
High Current Quad Output Regulato...

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  • 参数
  • 描述
  • 文档
参数 数值
Number of Outputs 4
Vin Min (V) 4.5
Vin Max (V) 22
Switch Current (A) 3.2 (2.4)
Vout Max (V) 20.35
Isupply (mA) 10 (14)
Synchronous (yes/no) no
Packages TSSOP-28E
Features Integrated Schottky Diode, Panel Protect, Power Good
Ishutdown (uA) 35
Vin Min Startup (V) 4.5
Vout Min (V) 1.25
Vswitch Max (V) 40
Frequency (kHz) 1200
Frequency Adjust Range
Frequency Sync Range
Topology Boost, Inverting, Buck
Monolithic (yes/no) yes
Extended Temp E
Comments High Current Quad Output Regulator for TFT LCD Displays
Featured no
Date Added 1984-01-01
Price 1k * $4.75 (LT1943EFE)
New no

特点
4 Integrated Switches: 2.4A Buck, 2.6A Boost,
0.35A Boost, 0.35A Inverter (Guaranteed Minimum Current Limit)
Fixed Frequency, Low Noise Outputs
Soft-Start for all Outputs
Externally Programmable V ON Delay
Integrated Schottky Diode for V ON Output
PGOOD Pin for AV DD Output Disconnect
4.5V to 22V Input Voltage Range
PanelProtect TM Circuitry Disables V ON Upon Fault
Available in Thermally Enhanced 28-Lead TSSOP

典型应用

典型应用

描述
The LT ? 1943 quad output adjustable switching regulator provides power for large TFT LCD panels. The device, housed in a low profile 28 pin thermally enhanced TSSOP package, can generate a 3.3V or 5V logic supply along with the triple output supply required for the TFT LCD panel. Operating from an input range of 4.5V to 22V, a step-down regulator provides a low voltage output V LOGIC with up to 2A current. A high-power step-up converter, a lowerpower step-up converter and an inverting converter provide the three independent output voltages AV DD , V ON and V OFF required by the LCD panel. A high-side PNP provides delayed turn-on of the V ON signal and can handle up to 30mA. Protection circuitry ensures that VON is disabled if any of the four outputs are more than 10% below the programmed voltage.
All switchers are synchronized to an internal 1.2MHz clock, allowing the use of low profile inductors and ceramic capacitors throughout. A current mode architecture provides excellent transient response. For best flexibility, all outputs are adjustable. Soft-start is included in all four channels. A PGOOD pin can drive an optional PMOS pass device to provide output disconnect for the AV DD output.

应用指南 (英文)
文档名称 文档类型 软件 描述
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN11 - Designing Linear Circuits for 5V Single Supply Operation
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN42 - Voltage Reference Circuit Collection
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN18 - Power Gain Stages for Monolithic Amplifiers
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN45 - Measurement and Control Circuit Collection
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN92 - Bias Voltage and Current Sense Circuits for Avalanche Photodiodes
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN3 - Applications for a Switched-Capacitor Instrumentation Building Block
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN9 - Application Considerations and Circuits for a New Chopper-Stabilized Op Amp
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN98 - Signal Sources, Conditioners and Power Circuitry Circuits of the Fall, 2004
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN93 - Instrumentation Applications for a Monolithic Oscillator: A Clock for All Reasons
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN7 - Some Techniques for Direct Digitization of Transducer Outputs
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN8 - Power Conditioning Techniques for Batteries
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN52 - Linear Technology Magazine Circuit Collection, Volume 1
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN28 - Thermocouple Measurement
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN14 - Designs for High Performance Voltage-to-Frequency Converters
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 AN43 - Bridge Circuits
LT Journal
文档名称 文档类型 软件 描述
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 Jun 1999 LTC2400 Differential Bridge Digitizers
可靠性数据
文档名称 文档类型 软件 描述
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 R071 Reliability Data
数据表 (英文)
文档名称 文档类型 软件 描述
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 LTC1043 - Dual Precision Instrumentation Switched-Capacitor Building Block
设计要点 (英文)
文档名称 文档类型 软件 描述
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 Design Solutions 6 - LTC2400 Differential to Single-Ended Converter for Single 5V Supply This Converter Has High Accuracy, Very Low Offset and Offset Drift, Rail-to-Rail Input Common Mode Range and is Live at Zero
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 Design Solutions 1 - LTC2400 High Accuracy Differential to Single-Ended Differential to Single-Ended Converter Has Very High Uncalibrated Accuracy and Low Offset and Drift
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 Design Solutions 2 - Simple Differential Front-End for the LTC2400 Simple Rail-to-Rail Circuit Converts Differential Signals to Single-Ended Signals and Operates on Single or Dual Supplies Where Resolution Is More Important Than Accuracy
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 Design Solutions 3 - Bipolar Input 24-Bit A/D Converter Accepts ±2.5V Inputs Differential Input 24-Bit A/D Converter Provides Half-Scale Zero for Bipolar Input Signals
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 Design Solutions 4 - High Accuracy, Differential to Single-Ended Conversion for Wide Range Bipolar Input Signals Bipolar Differential to Single-Ended Converter Drives the LTC2400's Input Rail-to-Rail
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 DN207 - LTC2400 High Accuracy Differential to Single-Ended Converter for ±5V Supplies
LT1943EFE#TRPBFPDF下载 点击下载 点击下载 Design Solutions 5 - Low Level, High Accuracy, Bipolar Input Differential to Single-Ended Signal Conversion for 24-Bit A/D Single Supply Differential to Single-Ended Conversion Circuit Amplifies Low Level Bipolar Signals and Maintains the LTC2400's High