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RT7243

6A, 18V同步降壓型轉換器

RT7243
New

RT7243 是一款可以從 4.5V-18V 的輸入電源提供 6A 輸出電流的高效、單晶片同步降壓型 DC/DC 轉換器。具有外部補償的 RT7243 電流模式結構能使瞬態回應在大範圍的負載和輸出電容間進行優化。逐週期電流限制能提供針對短路輸出的保護，軟啟動在啟動期間能消除輸入電流浪湧。故障狀態保護包括輸出欠壓保護、輸出過壓保護和超溫保護。低電流關斷模式能提供輸出斷開的功能，實現電池供電系統中簡單的電源管理。

應用

  • High Performance Point of Load Regulation
  • Notebook Computers
  • High Density and Distributed Power Systems

主要規格

RT7243
Status Active
Vin (min) (V) 4.5
Vin (max) (V) 18
Number of Outputs 1
Vout (min) (V) 0.8
Vout (max) (V) 15
Output Adj. Method Resistor
Iout (max) (A) 6
Current Limit (typ) (A) 11
Freq (typ) (kHz) 480
Freq (min) (kHz) 200
Freq (max) (kHz) 1600
Ext Sync Yes
Ron_HS (typ) (mOhm) 26
Ron_LS (typ) (mOhm) 19
Iq (typ) (mA) 0.6
Features 100% Duty Cycle;Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;External Synchronization;Force PWM;OCP;OTP;Power Good;Stable with Ceramic Capacitor;UVP
Package Type WQFN3.5x3.5-14A

關鍵特性

  • 低RDS(ON)功率金氧半場效電晶體開關26mΩ/19mΩ

  • 輸入電壓範圍：4.5V-18V

  • 可調切換頻率：200kHz-1.6MHz

  • 電流模式控制

  • 同步到外部時鐘：200kHz to 1.6MHz

  • 精確的基準電壓0.8V±1.25%

  • 單調啟動至預偏置輸出

  • 可調軟啟動

  • 電源正常指示器

  • 欠壓和過壓保護

  • 輸入欠壓鎖定

  • 通過RoHS認證，且不含鹵素

Application Notes

Datasheet

DS7243-06.pdf

Videos

如何使用簡單工具對電源轉換器的穩定性進行測試評估?

Datasheet

DS7243-06.pdf

RT7243GQW
Package Type:WQFN3.5x3.5-14A
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Evaluation Boards

EVB_RT7243GQW
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