loading
Richtek

8A, 23V, 500kHz 同步降壓型轉換器+3.3V/5V LDO

RT7238B/RT7238C/RT7238D/RT7238E

Update Alert Share

RT7238B/C/D/E是一款ACOT®(Advanced Constant On-Time)操作模式的同步降壓型DC/DC轉換器。系統操作於ACOT模式下可在廣負載變動範圍內提供良好的暫態回應。RT7238B/C/D/E可操作於輸入電壓從8V至23V。RT7238D的輸出電壓為0.6V至5V可調。

應用

  • 工業和商用低功耗系統
  • 電腦周邊設備
  • LCD顯示器和電視
  • 節能電器
  • 負載點調節的高性能DSP、FPGA和ASIC
主要規格
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)
關鍵特性
  • Advanced Constant On-Time (ACOT™) 控制模式
  • 輸入電壓範圍:8V至23V (RT7238B/C/D/E) @8A輸出電流
  • ACOT™架構支援MLCC輸出電容
  • 固定操作頻率:500kHz
  • 高效率內部MOSFET開關
    ►27mΩ高側和10mΩ低側
  • 可調輸出電壓:0.6V至5V (RT7238D)
  • LDO提供固定3.3V (RT7238B/D) 或固定5V (RT7238C/E) 輸出以及輸出電流為70mA
  • 預偏置軟啟動
  • 逐週期電流限制
  • 輸入欠電壓鎖定
  • 過溫保護
  • 輸出過/欠壓保護
Datasheet
TitleLast UpdateShareDownload
8A, 23V, 500kHz 同步降壓型轉換器+3.3V/5V LDO2015/06/25
Technical Documents
TitleLast UpdateShareDownload
ACOT™ (Advanced Constant-On Time) Synchronous Step-Down Converters2019/12/12
The Calculation of Output DC Offset for ACOT™ Control Buck Converter with Feed-forward Compensator2019/12/12
降壓轉換器架構之比較2019/12/12
工業、 汽車和LED照明應用的寬輸入電壓範圍DC/DC電源轉換方案2019/12/12
降壓轉換器的選擇標準2019/12/12
ACOTTM 穩定度測試2019/12/12
Videos
TitleLast UpdateShareViews
如何使用簡單工具對電源轉換器的穩定性進行測試評估?2017/03/30 311
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
立錡負載暫態量測工具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
TOP