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RT5753 是輸入電壓範圍為 2.5V-6V、負載能力為 3A、簡單易用的同步 Buck 轉換器,其參考電壓為 0.6V,集成低 RDS(ON) MOSFET 功率開關,使用 WDFN-8L 2x2 和 WDFN-8SL 2x2 封裝。
RT5753 使用改進型固定導通時間(ACOT®)控制架構,瞬態回應速度快,週邊元件少,在各種工作條件下的工作頻率都幾乎保持不變。輕載條件下,RT5753A/C/E/F 自動運行於 PSM 工作模式以維持其高轉換效率,RT5753B/D 則以強制 PWM 模式工作已確保滿足電壓調整精度的要求。
RT5753 在上下橋都實施電流檢測以實現強勁的過流保護性能,逐週期實施的電流限制保護可確保器件在輸出端短路、過流和電感飽和等情形下也不會造成災難性的後果,內建的軟啟動功能可避免出現啟動時出現電流衝擊,它還同時具備輸入欠壓鎖定保護、輸出欠壓保護、過壓保護(RT5753AL/BL/CL/DL/EL/FL)和過熱保護功能,可在各種工作條件下確保安全、平穩地運行。

應用

  • 行動電話和手持裝置
  • 機上盒和數據機
  • WLAN 設備 ASIC 電源和存儲裝置電源
  • 通用負載點低壓 Buck 轉換器
主要規格
RT5753A RT5753B RT5753C RT5753D RT5753EL RT5753FL
Status Active Active Active Active Active Active
Vin (min) (V) 2.5 2.5 2.5 2.5 2.5 2.5
Vin (max) (V) 5.5 5.5 5.5 5.5 5.5 5.5
Number of Outputs 1 1 1 1 1 1
Vout (min) (V) 0.6 0.6 0.6 0.6 0.6 0.6
Vout (max) (V) 5.5 5.5 5.5 5.5 5.5 5.5
Output Adj. Method Resistor Resistor Resistor Resistor Resistor Resistor
Iout (max) (A) 3 3 3 3 3 3
Current Limit (typ) (A) 3.45 3.45 3.45 3.45 3.45 3.45
Freq (typ) (kHz) 1200 1200 1200 1200 1200 1200
Ext Sync No No No No No No
Ron_HS (typ) (mOhm) 100 100 100 100 100 100
Ron_LS (typ) (mOhm) 70 70 70 70 70 70
Iq (typ) (mA) 0.035 0.035 0.035 0.035 0.035 0.035
Features 100% Duty Cycle;ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Force PWM;OCP;OTP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;Force PWM;OCP;OTP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP 100% Duty Cycle;ACOT Control;COT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OCP;OTP;OVP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type WDFN2x2-8;WDFN2x2-8S WDFN2x2-8;WDFN2x2-8S WDFN2x2-8;WDFN2x2-8S WDFN2x2-8;WDFN2x2-8S WDFN2x2-8;WDFN2x2-8S WDFN2x2-8;WDFN2x2-8S
關鍵特性
  • 輸入電壓範圍:2.5V-6V
  • 集成 100mΩ/70mΩ 功率開關
  • 以 100% 占空比實現超低壓差工作
  • 內部集成 1% 精度參考電壓源
  • 典型工作頻率:1.2MHz
  • 輕載節能模式(RT5753A/C/E/F)
  • ACOT® 控制架構
  • 內部集成 1.5ms/750μs 軟啟動
  • 使能控制輸入
  • Power Good 指示
  • 上下橋均參與過流保護
  • 負電流過流保護(RT5753B/D)
  • 輸入欠壓鎖定保護
  • 輸出欠壓保護
  • 過熱保護
  • 符合 RoHS 規範,不含鹵素
Technical Documents
TitleItem TypeLast UpdateDownload
立錡精選產品 Product Tree 手冊 [Aug., 2023] Selection Guide2023/08/07
Part NumberPackage TypePackage Qty.Free SampleDistributorStockBuy From Authorized Distributor
RT5753AHGQWWDFN2x2-83,000 Request Digikey 5,260 Buy
Mouser 0 Lead-Time: 14 weeks
RT5753AHGQWAWDFN2x2-8S3,000 Request Digikey 3,907 Buy
Mouser 3,561 Buy
RT5753ALGQWWDFN2x2-83,000 Request Digikey 2,156 Buy
Mouser 4,953 Buy
RT5753ALGQWAWDFN2x2-8S3,000 Request Digikey 5,487 Buy
Mouser 2,064 Buy
Evaluation Board
Part NumberDistributorStockBuy From Authorized Distributor
EVB_RT5753AHGQW Digikey 0 Lead-Time: 14 weeks
Mouser 0 Lead-Time: 14 weeks
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