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LTC1709EG-9#TRPBF

厂商:
Linear
类别:
数字电源管理
包装:
-
封装:
SSOP
无铅情况/ROHS:
无铅
描述:
2-Phase, 5-Bit Adjustable,High Ef...

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  • 参数
  • 描述
  • 文档
参数 数值
Number of Outputs 1
Max Phases (#) 2
Vin Min (V) 4
Vin Max (V) 36
Output Current (A) 40
VRM VRM 8.4
Features VID, PolyPhase
Packages SSOP-36
Frequency (kHz) 300
Frequency Sync Range
Frequency Adjust Range
Monolithic (yes/no) no
Synchronous (yes/no) yes
Topology Buck
Isupply (mA) 0.47
Ishutdown (uA) 20
Vout Max (V) 3.5
Vout Min (V) 1.3
Architecture -
Polyphase (yes/no) yes
Tracking (yes/no) no
Extended Temp E
Comments 2-Phase, 5-Bit Adjustable, High Efficiency, Synchronous Step-Down Switching Regulator
Featured no
Date Added 1984-01-01
Price 1k * $4.75 (LTC1709EG)
New no

特点
Two Ouput Stages Operate Antiphase Reducing Input Capacitance and Power Supply Noise
5-Bit VID Control (VRM 8.4 Compliant) V OUT : 1.3V to 3.5V in 50mV/100mV Steps
Current Mode Control Ensures Current Sharing
True Remote Sensing Differential Amplifier
OPTI-LOOP? Compensation Minimizes C OUT
Programmable Fixed Frequency: 150kHz to 300kHz—Effective 300kHz to 600kHz Switching Frequency
±1% Output Voltage Accuracy
Wide V IN Range: 4V to 36V Operation
Adjustable Soft-Start Current Ramping
Internal Current Foldback
Short-Circuit Shutdown Timer with Defeat Option
Overvoltage Soft-Latch Eliminates Nuisance Trips
Low Shutdown Current: 20μA
Small 36-Lead Narrow (0.209

典型应用

典型应用

描述
描述 The LTC?1709 is a 2-phase, VID programmable, synchronous step-down switching regulator controller that drives all N-channel external power MOSFET stages in a fixed frequency architecture. The 2-phase controller drives its two output stages out of phase at frequencies up to 300kHz to minimize the RMS ripple currents in both input and output capacitors. The 2-phase technique effectively multiplies the fundamental frequency by two, improving transient response while operating each channel at a optimum frequency for efficiency. Thermal design is also simplified. An internal differential amplifier provides true remote sensing of the regulated supply’s positive and negative output terminals as required in high current applications. The RUN/SS pin provides soft-start and optional timed, short-circuit shutdown. Current foldback limits MOSFET dissipaton during short-circuit conditions when overcurrent latchoff is disabled. OPTI-LOOP compensation allows the transient response to be optimized for a wide range of output capacitors and ESR values.

LTspice
文档名称 文档类型 软件 描述
LTC1709EG-9#TRPBFPDF下载 点击下载 点击下载 LTC1702A Demo Circuit - 550kHz Synchronous Buck Converter (5V to 1.8V @ 15A)
可靠性数据
文档名称 文档类型 软件 描述
LTC1709EG-9#TRPBFPDF下载 点击下载 点击下载 R384 Reliability Data
设计要点 (英文)
文档名称 文档类型 软件 描述
LTC1709EG-9#TRPBFPDF下载 点击下载 点击下载 Design Solutions 9 - 2-Phase DC/DC Controller Reduces Capacitanceand Increases Battery Life in Portable Applications
数据表 (英文)
文档名称 文档类型 软件 描述
LTC1709EG-9#TRPBFPDF下载 点击下载 点击下载 LTC1702A - Dual 550kHz Synchronous 2-Phase Switching Regulator Controller
数据表 (中文)
文档名称 文档类型 软件 描述
LTC1709EG-9#TRPBFPDF下载 点击下载 点击下载 LTC1702A - 550kHz 同步式两相双路开关稳压控制器