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RT5753 是输入电压范围为 2.5V-6V、负载能力为 3A、简单易用的同步 Buck 转换器,其参考电压为 0.6V,集成低 RDS(ON) MOSFET 功率开关,使用 WDFN-8L 2x2 和 WDFN-8SL 2x2 封装。
RT5753 使用改进型固定导通时间(ACOT®)控制架构,瞬态响应速度快,外围元件少,在各种工作条件下的工作频率都几乎保持不变。轻载条件下,RT5753A/C/E/F 自动运行于 PSM 工作模式以维持其高转换效率,RT5753B/D 则以强制 PWM 模式工作已确保满足电压调整精度的要求。
RT5753 在上下桥都实施电流检测以实现强劲的过流保护性能,逐周期实施的电流限制保护可确保器件在输出端短路、过流和电感饱和等情形下也不会造成灾难性的后果,内建的软启动功能可避免出现启动时出现电流冲击,它还同时具备输入欠压锁定保护、输出欠压保护、过压保护(RT5753AL/BL/CL/DL/EL/FL)和过热保护功能,可在各种工作条件下确保安全、平稳地运行。

应用

  • 移动电话和手持装置
  • 机顶盒和调制解调器
  • WLAN 设备 ASIC 电源和存储装置电源
  • 通用负载点低压 Buck 转换器
主要规格
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
关键特性
  • 输入电压范围:2.5V-6V
  • 集成 100mΩ/70mΩ 功率开关
  • 以 100% 占空比实现超低压差工作
  • 内部集成 1% 精度参考电压源
  • 典型工作频率:1.2MHz
  • 轻载节能模式(RT5753A/C/E/F)
  • ACOT® 控制架构
  • 内部集成 1.5ms/750μs 软启动
  • 使能控制输入
  • Power Good 指示
  • 上下桥均参与过流保护
  • 负电流过流保护(RT5753B/D)
  • 输入欠压锁定保护
  • 输出欠压保护
  • 过热保护
  • 符合 RoHS 规范,不含卤素
Technical Documents
TitleItem TypeLast UpdateDownload
立锜精选产品 Product Tree 手册 [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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