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LTC3772B - 典型应用图例：
LTC3772B典型应用图例一
LTC3772B典型应用图例二
LTC3772B - 封装图解：
LTC3772B封装图解一
LTC3772B封装图解二
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LINEAR产品 - LTC3772B介绍

LTC3772B - LTC3772B是Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller

LTC3772B是LINEAR凌力尔特公司的一款外部开关电源控制器产品，LTC3772B是LTC3772B是Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller，本站介绍了LTC3772B的封装应用图解、特点和优点、功能等，并给出了与LTC3772B相关的LINEAR元器件型号供参考。

LTC3772B - LTC3772B是Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller - 外部开关电源控制器 - 电源管理 - 凌力尔特

LTC3772B - Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller

LTC3772B - Micropower No RSENSE Constant Frequency Step-Down DC/DC Controller - Linear Technology（凌力尔特）

功能描述

The LTC3772B is a constant frequency current mode step-down DC/DC controller in a low profile 8-lead SOT-23 (ThinSOTTM) and a 3mm × 2mm DFN package. The No RSENSE TM architecture eliminates the need for a current sense resistor, improving efficiency and saving board space.

The LTC3772B automatically switches into pulse skipping operation at light loads. It consumes only 200μA of quiescent current under a no-load condition.

The LTC3772B incorporates an undervoltage lockout feature that shuts down the device when the input voltage falls below 2V. To maximize the runtime from a battery source, the external P-channel MOSFET is turned on continuously in dropout (100% duty cycle). High switching frequency of 550kHz allows the use of a small inductor and capacitors. An internal soft-start smoothly ramps the output voltage from zero to its regulation point.

特点
  • No Current Sense Resistor Required
  • High Output Currents Easily Achieved
  • Internal Soft-Start Ramps VOUT
  • Wide VIN Range: 2.75V to 9.8V
  • Low Dropout: 100% Duty Cycle
  • Constant Frequency 550kHz Operation
  • Low Ripple Pulse Skipping Operation at Light Load
  • Output Voltage as Low as 0.8V
  • ±1.5% Voltage Reference Accuracy
  • Current Mode Operation for Excellent Line and Load Transient Response
  • Only 8μA Supply Current in Shutdown
  • Low Profile 8-Lead SOT-23 (1mm) and (3mm × 2mm) DFN (0.75mm) Packages
    • 应用
  • 1- or 2-Cell Li-Ion Battery-Powered Applications
  • Wireless Devices
  • Portable Computers
  • Distributed Power Systems
    • 以下列出了不同封装及包装形式的具体型号,并标出了直接在linear官网上订货的价格（美元）
    器件型号 封装 温度 价格 (以 1 ~ 99 片为批量) 价格 (以 1000 片为批量)
    LTC3772BEDDB 3x2 DFN-8 E $2.73
    LTC3772BEDDB#PBF 3x2 DFN-8 E $2.73
    LTC3772BEDDB#TR 3x2 DFN-8 E $2.73 $1.91
    LTC3772BEDDB#TRM 3x2 DFN-8 E $2.73 $1.93
    LTC3772BEDDB#TRMPBF 3x2 DFN-8 E $2.73 $1.93
    LTC3772BEDDB#TRPBF 3x2 DFN-8 E $2.73 $1.91
    LTC3772BETS8 SOT-23 E $2.71
    LTC3772BETS8#PBF SOT-23 E $2.73
    LTC3772BETS8#TR SOT-23 E $2.71 $1.91
    LTC3772BETS8#TRM SOT-23 E $2.71 $1.93
    LTC3772BETS8#TRMPBF SOT-23 E $2.71 $1.93
    LTC3772BETS8#TRPBF SOT-23 E $2.71 $1.91
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  • LT3724 - 高电压、电流模式开关稳压控制器
  • LTC3801 - Micropower Constant Frequency Step-Down DC/DC Controllers in ThinSOT
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  • LTC1624 - High Efficiency SO-8 N-Channel Switching Regulator Controller
  • LT4363 - 具电流限制功能的高电压浪涌抑制器
  • LTC3803 - 采用 ThinSOT 封装的恒定频率、电流模式、反激式 DC/DC 控制器
  • LTC3873 - No Rsense 恒定频率、电流模式、升压/反激/SEPIC 型 DC/DC 控制器
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