loading
Richtek

RT6255A/B是高性能的同步Buck转换器,负载能力5A,输入电压范围为4.5V~18V,集成了低RDS(ON) MOSFET功率开关、0.6V参考电压源、自举二极管,构成了非常紧凑的方案。它采用改进型固定导通时间(ACOT®)控制架构,具有超快瞬态响应能力,外围元件少,在各种工作条件下的稳态工作频率几乎恒定不变,解决EMI问题的滤波器设计相对容易。它具有独立的使能控制和Power Good指示,有1.5ms软起动设计可限制启动期间的冲击电流,具有逐周期电流限制保护、欠压保护、输入欠压锁定保护和过热保护特性,其封装形式有TSOT-23-6(FC)和TSOT-23-8。

应用

  • 机顶盒
  • 便携式电视机
  • 无线接入路由器
  • 调制解调器
  • 液晶电视机
主要规格
RT6255A RT6255B
Status Active Active
Vin (min) (V) 4.5 4.5
Vin (max) (V) 18 18
Number of Outputs 1 1
Vout (min) (V) 0.6 0.6
Vout (max) (V) 5 5
Output Adj. Method Resistor Resistor
Iout (max) (A) 5 5
Current Limit (typ) (A) 7.25 7.25
Freq (typ) (kHz) 500 500
Ext Sync No No
Ron_HS (typ) (mOhm) 45 45
Ron_LS (typ) (mOhm) 23 23
Iq (typ) (mA) 0.115 0.115
Features ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OTP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP ACOT Control;Cycle-by-Cycle Current Limit;Enable Input;Fast Transient Response;OTP;PSM;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type TSOT-26(FC);TSOT-28(FC) TSOT-26(FC);TSOT-28(FC)
关键特性
  • 输入电压范围:4.5V~18V
  • 负载能力:5A
  • 采用ACOT®控制架构,具有超快瞬态响应能力
  • 稳态工作频率:500kHz
    ►强制PWM模式(RT6255B)
    ►轻载PSM模式(RT6255A)
  • 针对使用低ESR陶瓷输出电容进行了优化
  • 输出电压可调范围:0.6V~5V
  • 集成45mΩ/23mΩ功率开关
  • 逐周期电流限制保护
  • 预偏置兼容软启动,时间1.5ms或外部可调可选
  • Power Good指示可选
  • 输出欠压保护
  • 过热保护
  • 输入欠压锁定保护
  • TSOT-23-6(FC)或TSOT-23-8(FC)封装
Technical Documents
TitleItem TypeLast UpdateDownload
立锜全系列产品选择指南 [Jan., 2024] Selection Guide2024/01/19
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
RT6255AHGJ6FTSOT-26(FC)3,000 Request Digikey 1,148 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT6255BHGJ6FTSOT-26(FC)3,000 Request Digikey 2,691 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
RT6255BHGJ8FTSOT-28(FC)3,000 Request Digikey 3,300 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
Evaluation Board
Part NumberDistributorStockBuy From Authorized Distributor
EVB_RT6255AHGJ6F Digikey 1 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
EVB_RT6255BHGJ8F Digikey 4 Buy
Mouser Lead-Time: 14 weeks Not Available
WPG Lead-Time: 14 weeks Not Available
TOP