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RT7238B/RT7238C/RT7238D/RT7238E

8A, 23V, 500kHz 同步降壓型轉換器+3.3V/5V LDO

詳見規格書訂閱接收更新消息

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	Lifebuy	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;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;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;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;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
Title	Last Update	Download
8A, 23V, 500kHz 同步降壓型轉換器+3.3V/5V LDO	2014/11/07

Technical Documents
Title	Item Type	Last Update	Download
The Calculation of Output DC Offset for ACOT™ Control Buck Converter with Feed-forward Compensator	App. Note	2015/12/03
ACOT™ (Advanced Constant-On Time) Synchronous Step-Down Converters [Oct., 2015]	Selection Guide	2015/10/02
降壓轉換器的選擇標準	App. Note	2015/05/01
降壓轉換器架構之比較	App. Note	2015/01/01
ACOT^® 穩定度測試	App. Note	2013/11/01

Videos
Title	Last Update	Views
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	500

Evaluation Boards
Title	Last Update	Download
Synchronous Step-Down Converter’s Evaluation Board for RT7238 Integrated Chip	2015/11/10

Reference Design
Title	Last Update	Download
立錡負載暫態量測工具	2018/11/01

Part Number	Package Type	Package Qty.	Free Sample	Buy From Authorized Distributor
RT7238DGQUF	UQFN3x3-10(FC)	1500	Request	Buy from Distributor

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