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LM1770

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具有无需外部补偿组件的低电压 SOT23 同步降压控制器

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TPS62826 正在供货 采用 1.5mm x 1.5mm VSON-HR 封装、具有 1% 精度的 2.4V 至 5.5V 输入、3A 降压转换器 Smaller solution size DC/DC converter family 1 A, 2 A, 3 A and 4 A

LM1770

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Rating Catalog Iout (max) (A) 4 Vin (max) (V) 5.5 Vin (min) (V) 2.8 Vout (max) (V) 4.5 Vout (min) (V) 0.8 Control mode Constant on-time (COT) Features Light Load Efficiency Duty cycle (max) (%) 98 Iq (typ) (A) 0.0004 Number of phases 1 Operating temperature range (°C) -40 to 125
Rating Catalog Iout (max) (A) 4 Vin (max) (V) 5.5 Vin (min) (V) 2.8 Vout (max) (V) 4.5 Vout (min) (V) 0.8 Control mode Constant on-time (COT) Features Light Load Efficiency Duty cycle (max) (%) 98 Iq (typ) (A) 0.0004 Number of phases 1 Operating temperature range (°C) -40 to 125
SOT-23 (DBV) 5 8.12 mm² (2.9 mm × 2.8 mm)
  • Input Voltage Range of 2.8V to 5.5V
  • 0.8V Reference Voltage
  • No Compensation Required
  • Constant Frequency Across Input Range
  • Low Quiescent Current of 400µA
  • Internal Soft-start
  • Short Circuit Protection
  • 5-Pin SOT-23 Package

All trademarks are the property of their respective owners.

  • Input Voltage Range of 2.8V to 5.5V
  • 0.8V Reference Voltage
  • No Compensation Required
  • Constant Frequency Across Input Range
  • Low Quiescent Current of 400µA
  • Internal Soft-start
  • Short Circuit Protection
  • 5-Pin SOT-23 Package

All trademarks are the property of their respective owners.

The LM1770 is an efficient synchronous buck switching controller in a tiny SOT-23 package. The constant on-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. It also incorporates a unique input feed-forward to maintain a constant frequency independent of the input voltage. The LM1770 is optimized for a low voltage input range of 2.8V to 5.5V and can provide an adjustable output as low as 0.8V. Driving an external high side PFET and low side NFET it can provide efficiencies as high as 95%.

Three versions of the LM1770 are available depending on the switching frequency desired for the application. Nominal switching frequencies are in the range of 100kHz to 1000kHz.

The LM1770 is an efficient synchronous buck switching controller in a tiny SOT-23 package. The constant on-time control scheme provides a simple design free of compensation components, allowing minimal component count and board space. It also incorporates a unique input feed-forward to maintain a constant frequency independent of the input voltage. The LM1770 is optimized for a low voltage input range of 2.8V to 5.5V and can provide an adjustable output as low as 0.8V. Driving an external high side PFET and low side NFET it can provide efficiencies as high as 95%.

Three versions of the LM1770 are available depending on the switching frequency desired for the application. Nominal switching frequencies are in the range of 100kHz to 1000kHz.
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顶层文档 类型 标题 格式选项 下载最新的英语版本 日期
* 数据表 LM1770 Low-V SOT23 Synch Buck Cntrr w/No Ext Compensation 数据表 (Rev. C) 2013-4-3
应用手册 AN-1414 LM1770 Design Reference (Rev. A) 2013-4-23
应用手册 Controlling Output Ripple & Achiev ESR Indep Constant On-Time Reg Designs (Rev. A) 2013-4-23
应用手册 FPGA所需的电源供应：深入分析 英语版 2007-3-22
应用手册 Application Note 1400 LM1770 Evaluation Board (cn) 2005-9-30

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封装 引脚 CAD 符号、封装和 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
适用于评估类项目的 TI 标准条款与条件。

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