主页 电源管理 AC/DC 和 DC/DC 转换器（集成 FET）
主页
电源管理
AC/DC 和 DC/DC 转换器（集成 FET）

LM3670

正在供货

用于超低电压电路的微型降压 DC-DC 转换器

立即订购
数据表

LM3670

正在供货
数据表 立即订购

产品详情

Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 0.35 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 1300 Features Enable, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.7 Vout (max) (V) 3.3 Iq (typ) (µA) 15 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -40 to 85 Topology Buck Type Converter Iout (max) (A) 0.35 Vin (min) (V) 2.5 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 550 Switching frequency (max) (kHz) 1300 Features Enable, Light Load Efficiency, Light load efficiency, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 0.7 Vout (max) (V) 3.3 Iq (typ) (µA) 15 Duty cycle (max) (%) 100
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Input Voltage Range: 2.5 V to 5.5 V
  • Adjustable Output Voltages (VOUT): 0.7 V to 2.5 V
  • Fixed Output Voltages: 1.2 V, 1.5 V, 1.6 V, 1.8 V, 1.875 V, 3.3V
  • 15-µA Typical Quiescent Current
  • 350-mA Maximum Load Capability
  • 1-MHz PWM Fixed Switching Frequency (Typical)
  • Automatic PFM and PWM Mode Switching
  • Low Dropout Operation – 100% Duty Cycle Mode
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • 0.1-µA Typical Shutdown Current
  • Current Overload Protection
  • Operates from a Single Li-Ion Cell or Three-Cell NiMH/NiCd Batteries
  • Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)
  • Input Voltage Range: 2.5 V to 5.5 V
  • Adjustable Output Voltages (VOUT): 0.7 V to 2.5 V
  • Fixed Output Voltages: 1.2 V, 1.5 V, 1.6 V, 1.8 V, 1.875 V, 3.3V
  • 15-µA Typical Quiescent Current
  • 350-mA Maximum Load Capability
  • 1-MHz PWM Fixed Switching Frequency (Typical)
  • Automatic PFM and PWM Mode Switching
  • Low Dropout Operation – 100% Duty Cycle Mode
  • Internal Synchronous Rectification for High Efficiency
  • Internal Soft Start
  • 0.1-µA Typical Shutdown Current
  • Current Overload Protection
  • Operates from a Single Li-Ion Cell or Three-Cell NiMH/NiCd Batteries
  • Only Three Tiny Surface-Mount External Components Required (One Inductor, Two Ceramic Capacitors)

The LM3670 step-down DC-DC converter is optimized for powering ultralow voltage circuits from a single Li-Ion cell or three-cell NiMH/NiCd batteries. It provides up to 350-mA load current, over an input voltage range from 2.5 V to 5.5 V. There are several different fixed voltage output options available as well as an adjustable output voltage version.

The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems. Automatic intelligent switching between pulse width modulation (PWM) low-noise and pulse frequency modulation (PFM) low-current mode offers improved system control. During full-power operation, a fixed-frequency 1-MHz (typical) PWM mode drives loads from approximately 70 mA to 350 mA maximum, with up to 95% efficiency. Hysteretic PFM mode extends the battery life through reduction of the quiescent current to 15 µA (typical) during light current loads and system standby. Internal synchronous rectification provides high efficiency (90% to 95% typical at loads between 1 mA and 100 mA). In shutdown mode (enable (EN) pin pulled low) the device turns off and reduces battery consumption to 0.1 µA (typical).

The LM3670 is available in a 5-pin SOT-23 package. A high switching frequency (1 MHz typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required.

For all available packages, see the orderable addendum at the end of the data sheet.

The LM3670 step-down DC-DC converter is optimized for powering ultralow voltage circuits from a single Li-Ion cell or three-cell NiMH/NiCd batteries. It provides up to 350-mA load current, over an input voltage range from 2.5 V to 5.5 V. There are several different fixed voltage output options available as well as an adjustable output voltage version.

The device offers superior features and performance for mobile phones and similar portable applications with complex power management systems. Automatic intelligent switching between pulse width modulation (PWM) low-noise and pulse frequency modulation (PFM) low-current mode offers improved system control. During full-power operation, a fixed-frequency 1-MHz (typical) PWM mode drives loads from approximately 70 mA to 350 mA maximum, with up to 95% efficiency. Hysteretic PFM mode extends the battery life through reduction of the quiescent current to 15 µA (typical) during light current loads and system standby. Internal synchronous rectification provides high efficiency (90% to 95% typical at loads between 1 mA and 100 mA). In shutdown mode (enable (EN) pin pulled low) the device turns off and reduces battery consumption to 0.1 µA (typical).

The LM3670 is available in a 5-pin SOT-23 package. A high switching frequency (1 MHz typical) allows use of tiny surface-mount components. Only three external surface-mount components, an inductor and two ceramic capacitors, are required.

For all available packages, see the orderable addendum at the end of the data sheet.

filter 查找其他 AC/DC 和 DC/DC 转换器（集成 FET）
下载 观看带字幕的视频 视频

您可能感兴趣的相似产品

open-in-new 比较替代产品
功能与比较器件相似
TPS62230 正在供货 采用 1x1.5 SON 封装、具有 DCS-Control 的 2MHz 超小型降压转换器 Simple DC/DC converter with fast transient response at <12-mm² total BOM size.
TPS62671 正在供货 500mA、6MHz 高效降压转换器，Vout=1.8V Simple low-noise DC/DC converter in CSP at <12-mm² total BOM size.
TPS82671 正在供货 采用 MicroSiP™ 封装的 600mA 完全集成式低噪声降压转换器模块 Module with smaller BOM size and integrated inductor, input and output capacitors.

技术文档

star =有关此产品的 TI 精选热门文档
未找到结果。请清除搜索并重试。
查看全部 6
类型 标题 下载最新的英语版本 日期
* 数据表 LM3670 Miniature Step-Down DC-DC Converter for Ultralow Voltage Circuits 数据表 (Rev. F) PDF | HTML 2016年 2月 18日
应用手册 TI 降压开关直流/直流转换器应用手册的快速参考指南 (Rev. B) PDF | HTML 英语版 (Rev.B) PDF | HTML 2022年 7月 8日
选择指南 电源管理指南 2018 (Rev. K) 2018年 7月 31日
选择指南 电源管理指南 2018 (Rev. R) 2018年 6月 25日
EVM 用户指南 AN-1348 LM3670 Evaluation Board (Rev. D) 2013年 4月 30日
应用手册 Application Note 1348 LM3670 Evaluation Board (cn) 2008年 10月 9日

设计和开发

如需其他信息或资源，请点击以下任一标题进入详情页面查看（如有）。

评估板

LM3670MF-1.8EV — 用于超低电压电路的微型降压 DC-DC 转换器

The LM3670 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3670 step-down DC-DC converter is optimized for powering ultra-low voltage circuits from a single Li-Ion cell or 3 cell NiMH/NiCd (...)

用户指南: PDF
TI.com 上无现货
评估板

TMDSLCD1EVM — 1280x800 LCD 显示附件套件

1280 x 800 LCD 显示附件套件是一款用于 AM65x IDK (TMDX654IDKEVM) 的附加附件，增加了触摸和显示功能，适用于 HMI 和工业 PC 评估以及其他需要显示器的用例。1280 x 800 LCD 显示附件套件带有 AM65x EVM (TMDX654GPEVM)，但也可以作为替代品单独出售。此 LCD 屏幕为 10.1" 显示屏，具有 WXGA 分辨率 (1280 x 800) 并支持 10 点电容式触摸。

TI.com 上无现货
封装 引脚 CAD 符号、封装和 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
应遵守 TI 评估类商品的标准条款与条件。

订购和质量

包含信息：
  • RoHS
  • REACH
  • 器件标识
  • 引脚镀层/焊球材料
  • MSL 等级/回流焊峰值温度
  • MTBF/时基故障估算
  • 材料成分
  • 鉴定摘要
  • 持续可靠性监测
包含信息：
  • 制造厂地点
  • 封装厂地点

支持和培训

视频