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LTC3444EDD#TRPBF

厂商：
Linear
类别：
开关稳压器
包装：
-
封装：
DFN
无铅情况/ROHS：
无铅
描述：
Micropower Synchronous Buck-Boost...

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  • 参数
  • 描述
  • 文档
参数 数值
Number of Outputs 1
Vin Min (V) 2.7
Vin Max (V) 5.5
Output Current (A) 0.4
Vout Min (V) 0.5
Vout Max (V) 5
Features Output Disconnect, Soft Start
Packages DFN-8
Frequency (kHz) 1500
Frequency Adjust Range
Frequency Sync Range
Switch Current (A)
Ishutdown (uA) 0.1
Isupply (mA) 0.7
Monolithic (yes/no) yes
Synchronous (yes/no) yes
Topology Buck-Boost
Integrated Inductor (yes/no) no
Extended Temp E
Comments Micropower Synchronous Buck-Boost DC/DC Converter for WCDMA Applications
Featured no
Date Added 1984-01-01
Price 1k * $2.40 (LTC3444EDD)
New no

特点
Optimized Features for WCDMA Handsets
Regulated Output with Input Voltages Above, Below, or Equal to the Output
0.5V to 5V Output Range
Up to 400mA Continuous Output Current From a Single Lithium-Ion Cell
Minimal External Components
1.5MHz Fixed Frequency Operation
Internal Loop Compensation for Fast Response <25μs Full Scale Output Slewing; COUT 4.7μF
Output Disconnect in Shutdown
2.75V to 5.5V Input
<1μA Shutdown Current
Internal Soft-Start
Output Overvoltage Protection
Single Inductor, No Schottky Diodes Required
Small, Thermally Enhanced 8-Lead (3mm × 3mm) DFN Package

典型应用

典型应用

描述
The LTC3444 has been optimized for use in 3G WCDMA applications. A unique design yields high efficiency at very low output voltages while also eliminating external components. The high speed error amplifier provides the fast transient response required to slew the RF power amplifier from standby to transmit and transmit to stand by power levels. Output overvoltage protection protects the RF power amplifier.
Operating frequency is internally set to 1.5MHz to minimize external component size while maximizing efficiency. Other features include <1μA shutdown current, internal soft-start, peak current limit and thermal shutdown.
The LTC3444 is available in a small, thermally enhanced 8-lead (3mm × 3mm) DFN package.

请选择文档类型：
设计要点 (英文)
文档名称 文档类型 软件 描述
LTC3444EDD#TRPBFPDF下载 点击下载 点击下载 Design Solutions 10 - Active Voltage Positioning Reduces Output Capacitors
产品新闻发布 (中文)
文档名称 文档类型 软件 描述
LTC3444EDD#TRPBFPDF下载 点击下载 点击下载 具 PLL 和输出跟踪功能的双输出多相 DC/DC 降压型控制器
产品新闻发布 (英文)
文档名称 文档类型 软件 描述
LTC3444EDD#TRPBFPDF下载 点击下载 点击下载 Dual PolyPhase DC/DC Step-Down Controller with PLL & Output Tracking
可靠性数据
文档名称 文档类型 软件 描述
LTC3444EDD#TRPBFPDF下载 点击下载 点击下载 R384 Reliability Data
LT Journal
文档名称 文档类型 软件 描述
LTC3444EDD#TRPBFPDF下载 点击下载 点击下载 Sep 2006 Reduce the Size and Cost of High Current, High-Power-Density Systems with Tracking Dual, 2-Phase Constant Frequency Step-Down Regulator
LTC3444EDD#TRPBFPDF下载 点击下载 点击下载 Sep 2006 High Voltage Step-Down Controller Delivers High Power with Minimum Number of Components
数据表 (英文)
文档名称 文档类型 软件 描述
LTC3444EDD#TRPBFPDF下载 点击下载 点击下载 LTC3828 - Dual, 2-Phase Step-Down Controller with Tracking
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