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AC/DC 和 DC/DC 轉換器 (整合式 FET)

LM3674

現行

採用 SOT 23-5 的 2MHz、600mA 降壓 DC-DC 轉換器

立即訂購
產品規格表

LM3674

現行
產品規格表 立即訂購

產品詳細資料

Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1600 Switching frequency (max) (kHz) 2600 Features Enable, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 1.1 Vout (max) (V) 3.3 Iq (typ) (µA) 300 Duty cycle (max) (%) 100
Rating Catalog Operating temperature range (°C) -30 to 85 Topology Buck Type Converter Iout (max) (A) 0.6 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1600 Switching frequency (max) (kHz) 2600 Features Enable, Synchronous Rectification Control mode Voltage mode Vout (min) (V) 1.1 Vout (max) (V) 3.3 Iq (typ) (µA) 300 Duty cycle (max) (%) 100
SOT-23 (DBV) 5 8.12 mm² 2.9 x 2.8
  • Input Voltage Range From 2.7 V to 5.5 V
  • 600-mA Maximum Load Current
  • Available in Fixed and Adjustable Output Voltages
    Ranging From 1 V to 3.3 V
  • Operates From a Single Li-Ion Cell Battery
  • Internal Synchronous Rectification for High
    Efficiency
  • Internal Soft-Start
  • 0.01-µA Typical Shutdown Current
  • 2-MHz PWM Fixed Switching Frequency (typical)
  • Current Overload Protection and Thermal
    Shutdown Protection
  • Input Voltage Range From 2.7 V to 5.5 V
  • 600-mA Maximum Load Current
  • Available in Fixed and Adjustable Output Voltages
    Ranging From 1 V to 3.3 V
  • Operates From a Single Li-Ion Cell Battery
  • Internal Synchronous Rectification for High
    Efficiency
  • Internal Soft-Start
  • 0.01-µA Typical Shutdown Current
  • 2-MHz PWM Fixed Switching Frequency (typical)
  • Current Overload Protection and Thermal
    Shutdown Protection

The LM3674 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 600-mA load current over the entire input voltage range. There are several fixed output voltages and adjustable output voltage versions.

The device offers superior features and performance for mobile phones and similar portable systems. During the Pulse Width Modulation (PWM) mode, the device operates at a fixed-frequency of 2 MHz (typical). Internal synchronous rectification provides high efficiency during the PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

The LM3674 is available in a 5-pin SOT-23 package. A high switching frequency of 2 MHz (typical) allows use of only three tiny external surface-mount components, an inductor and two ceramic capacitors.

The LM3674 step-down DC-DC converter is optimized for powering low-voltage circuits from a single Li-Ion cell battery and input voltage rails from 2.7 V to 5.5 V. It provides up to 600-mA load current over the entire input voltage range. There are several fixed output voltages and adjustable output voltage versions.

The device offers superior features and performance for mobile phones and similar portable systems. During the Pulse Width Modulation (PWM) mode, the device operates at a fixed-frequency of 2 MHz (typical). Internal synchronous rectification provides high efficiency during the PWM mode operation. In shutdown mode, the device turns off and reduces battery consumption to 0.01 µA (typical).

The LM3674 is available in a 5-pin SOT-23 package. A high switching frequency of 2 MHz (typical) allows use of only three tiny external surface-mount components, an inductor and two ceramic capacitors.

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類型 標題 日期
* Data sheet LM3674 2-MHz, 600-mA Step-Down DC-DC Converter in SOT-23 datasheet (Rev. G) PDF | HTML 2015年 4月 24日
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 2022年 5月 23日
Design guide 2-Port USB 3.0 Hub (TIDA-00287) 2014年 8月 1日
EVM User's guide AN-1427 LM3674 Evaluation Board (Rev. K) 2013年 4月 30日

設計與開發

如需其他條款或必要資源，請按一下下方的任何標題以檢視詳細頁面 (如有)。

開發板

LM3674MF-1.8EV — 採用 SOT 23-5 的 2MHz、600mA 降壓 DC-DC 轉換器

The LM3674 evaluation board is a working demonstration of a step down DC-DC converter. The application note contains information about the evaluation board. The LM3674 step-down DC-DC converter is optimized for powering low voltage circuits from a single Li-Ion cell battery and input voltage rails (...)

使用指南: PDF
TI.com 無法提供
參考設計

TIDA-00287 — 雙埠 USB 3.0 集線器參考設計

This verified reference design is a two-port, USB 3.0 compliant hub.  It provides simultaneous SuperSpeed and high-speed/full-speed connections on the upstream port and provides SuperSpeed, high-speed, full-speed, or low-speed connections on the downstream ports.

The hub design provides power (...)

Design guide: PDF
電路圖: PDF
封裝 針腳 CAD 符號、佔位空間與 3D 模型
SOT-23 (DBV) 5 Ultra Librarian
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