首頁 電源管理 DC/DC 切換穩壓器 DC/DC 控制器
首頁
電源管理
DC/DC 切換穩壓器
DC/DC 控制器

LM3477

現行

適用於切換穩壓器的高效率高壓側 N 通道控制器

立即訂購
產品規格表

現在提供此產品的更新版本

open-in-new 比較替代產品
功能相似於所比較的產品。
TPS51397A 現行 4.5-V 至 24-V 輸入、10-A 同步降壓穩壓器 Higher current converter with light-load efficiency in a smaller package.

LM3477

現行
立即訂購

產品詳細資料

Rating Catalog Topology Buck Iout (max) (A) 6 Vin (max) (V) 35 Vin (min) (V) 2.95 Vout (max) (V) 31 Vout (min) (V) 1.265 Control mode current mode Features Enable Duty cycle (max) (%) 93 Iq (typ) (A) 0.002 Number of phases 1 Operating temperature range (°C) -40 to 125
Rating Catalog Topology Buck Iout (max) (A) 6 Vin (max) (V) 35 Vin (min) (V) 2.95 Vout (max) (V) 31 Vout (min) (V) 1.265 Control mode current mode Features Enable Duty cycle (max) (%) 93 Iq (typ) (A) 0.002 Number of phases 1 Operating temperature range (°C) -40 to 125
VSSOP (DGK) 8 14.7 mm² (3 mm × 4.9 mm)
  • 500kHz Switching Frequency
  • Adjustable Current Limit
  • 1.5% Reference
  • Thermal Shutdown
  • Frequency Compensation Optimized with a Single Capacitor and Resistor
  • Internal Softstart
  • Current Mode Operation
  • Undervoltage Lockout with Hysteresis
  • 8-lead (VSSOP-8) Package

All trademarks are the property of their respective owners.

  • 500kHz Switching Frequency
  • Adjustable Current Limit
  • 1.5% Reference
  • Thermal Shutdown
  • Frequency Compensation Optimized with a Single Capacitor and Resistor
  • Internal Softstart
  • Current Mode Operation
  • Undervoltage Lockout with Hysteresis
  • 8-lead (VSSOP-8) Package

All trademarks are the property of their respective owners.

The LM3477/A is a high-side N-channel MOSFET switching regulator controller. It can be used in topologies requiring a high side MOSFET such as buck, inverting (buck-boost) and zeta regulators. The LM3477/A's internal push pull driver allows compatibility with a wide range of MOSFETs. This, the wide input voltage range, use of discrete power components and adjustable current limit allows the LM3477/A to be optimized for a wide variety of applications.

The LM3477/A uses a high switching frequency of 500kHz to reduce the overall solution size. Current-mode control requires only a single resistor and capacitor for frequency compensation. The current mode architecture also yields superior line and load regulation and cycle-by-cycle current limiting. A 5µA shutdown state can be used for power savings and for power supply sequencing. Other features include internal soft-start and output over voltage protection. The internal soft-start reduces inrush current. Over voltage protection is a safety feature to ensure that the output voltage stays within regulation.

The LM3477A is similar to the LM3477. The primary difference between the two is the point at which the device transitions into hysteretic mode. The hysteretic threshold of the LM3477A is one-third of the LM3477.

The LM3477/A is a high-side N-channel MOSFET switching regulator controller. It can be used in topologies requiring a high side MOSFET such as buck, inverting (buck-boost) and zeta regulators. The LM3477/A's internal push pull driver allows compatibility with a wide range of MOSFETs. This, the wide input voltage range, use of discrete power components and adjustable current limit allows the LM3477/A to be optimized for a wide variety of applications.

The LM3477/A uses a high switching frequency of 500kHz to reduce the overall solution size. Current-mode control requires only a single resistor and capacitor for frequency compensation. The current mode architecture also yields superior line and load regulation and cycle-by-cycle current limiting. A 5µA shutdown state can be used for power savings and for power supply sequencing. Other features include internal soft-start and output over voltage protection. The internal soft-start reduces inrush current. Over voltage protection is a safety feature to ensure that the output voltage stays within regulation.

The LM3477A is similar to the LM3477. The primary difference between the two is the point at which the device transitions into hysteretic mode. The hysteretic threshold of the LM3477A is one-third of the LM3477.
filter 尋找其它 DC/DC 控制器
下載 觀看有字幕稿的影片 影片

技術文件

找不到結果。請清除您的搜尋條件，然後再試一次。
檢視所有 3
重要文件 類型 標題 格式選項 下載最新的英文版本 日期
* 資料表 LM3477 High Efficiency High-Side N-Channel Controller for Switching Regulator datasheet (Rev. K) 2013/3/21
選擇指南 Power Management Guide 2018 (Rev. R) 2018/6/25
類比設計期刊 Reduce buck-converter EMI and voltage stress by minimizing inductive parasitics 2016/7/21

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)。

封裝 針腳 CAD 符號、佔位空間與 3D 模型
VSSOP (DGK) 8 Ultra Librarian
適用 TI 的評估品項標準條款與條件。

訂購與品質

建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。

支援與培訓

內含 TI 工程師技術支援的 TI E2E™ 論壇

以英文檢視所有論壇主題

內容係由 TI 和社群貢獻者依「現狀」提供，且不構成 TI 規範。檢視使用條款。

若有關於品質、封裝或訂購 TI 產品的問題，請參閱 TI 支援。​​​​​​​​​​​​​​

影片