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8A, 23V, 500kHz 同步降压型转换器+3.3V/5V LDO

RT7238B/RT7238C/RT7238D/RT7238E

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RT7238B/C/D/E是一款ACOT®(Advanced Constant On-Time)操作模式的同步降压型DC/DC转换器。系统操作于ACOT模式下可在广负载变动范围内提供良好的瞬时响应。RT7238B/C/D/E可操作于输入电压从8V至23V。RT7238D的输出电压为0.6V至5V可调。

应用

  • 工业和商用低功耗系统
  • 计算机接口设备
  • LCD显示器和电视
  • 节能电器
  • 负载点调节的高性能DSP、FPGA和ASIC
主要规格
RT7238B RT7238C RT7238D RT7238E
Status Active Active Active Active
Vin (min) (V) 8 8 8 8
Vin (max) (V) 23 23 23 23
Number of Outputs 2 2 2 2
Vout (min) (V) 3.35 5.1 0.6 5
Vout (max) (V) 3.35 5.1 5 5
Output Adj. Method Fixed Fixed Resistor Fixed
Iout (max) (A) 8 8 8 8
Current Limit (typ) (A) 9 9 12 9
Freq (typ) (kHz) 500 500 500 500
Freq (min) (kHz) 450 450 450 450
Freq (max) (kHz) 550 550 550 550
Ext Sync No No No No
Ron_HS (typ) (mOhm) 27 27 27 27
Ron_LS (typ) (mOhm) 10 10 10 10
Iq (typ) (mA) 0.11 0.11 0.11 0.11
Features ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Low Dropout;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Low Dropout;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Low Dropout;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP ACOT Control;Adjustable Current Limit;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Low Dropout;OVP;PSM;Power Good;Stable with Ceramic Capacitor;UVP
Package Type UQFN3x3-10(FC) UQFN3x3-10(FC) UQFN3x3-10(FC) UQFN3x3-10(FC)
关键特性
  • Advanced Constant On-Time (ACOT™) 控制模式
  • 输入电压范围:8V至23V (RT7238B/C/D/E) @8A输出电流
  • ACOT™架构支持MLCC输出电容
  • 固定操作频率:500kHz
  • 高效率内部MOSFET开关
    ►27mΩ高侧和10mΩ低侧
  • 可调输出电压:0.6V至5V (RT7238D)
  • LDO提供固定3.3V (RT7238B/D) 或固定5V (RT7238C/E) 输出以及输出电流为70mA
  • 预偏置软启动
  • 逐周期电流限制
  • 输入欠电压锁定
  • 过温保护
  • 输出过/欠压保护
Datasheet
TitleLast UpdateShareDownload
8A, 23V, 500kHz 同步降压型转换器+3.3V/5V LDO2015/06/25
Technical Documents
TitleLast UpdateShareDownload
ACOT™ (Advanced Constant-On Time) Synchronous Step-Down Converters2019/12/13
Buck转换器的选择标准2019/12/12
The Calculation of Output DC Offset for ACOT™ Control Buck Converter with Feed-forward Compensator2019/12/12
降压转换器架构之比较2019/12/12
ACOT™ Stability Testing2019/12/12
工业、 汽车和LED照明应用的宽输入电压范围DC/DC电源转换方案2019/12/12
Videos
TitleLast UpdateShareViews
怎样使用简单工具对电源转换器的稳定性进行测试评估?2017/03/30 587
Evaluation Boards
TitleLast UpdateShareDownload
Synchronous Step-Down Converter’s Evaluation Board for RT7238 Integrated Chip2015/11/10
Synchronous Step-Down Converter’s Evaluation Board for RT7238 Integrated Chip2015/11/10
Synchronous Step-Down Converter’s Evaluation Board for RT7238 Integrated Chip2015/11/10
Reference Design
TitleLast UpdateShareDownload
立锜负载瞬变测试工具2018/11/01
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RT7238BGQUFUQFN3x3-10(FC)1500 Not available Buy from Distributor
RT7238CGQUFUQFN3x3-10(FC)1500 Not available Buy from Distributor
RT7238DGQUFUQFN3x3-10(FC)1500 Not available Buy from Distributor
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