RT9742

70mΩ/55mΩ, 3A/2.5A/2A/1.5A/1A/0.5A 高側功率開關

RT9742 是用於 USB 應用的低成本、低壓高側功率開關，同時具備低導通電阻和低電流消耗的特性。
它集成了過流保護電路、短路電流折返電路、熱關機保護電路和欠壓鎖定保護電路以實現所有的保護功能，有故障指示輸出可向USB控制器指示故障狀態，還集成了延時功能以防止衝擊電流所造成的誤操作。它是 USB 電源應用的理想選擇，也同時支援其它靈活的應用，其封裝形式有 TSOT-23-5、TSOT-23-5 (FC)與SOT-23-3。

應用

USB設備
筆記型電腦

主要規格
	RT9742A	RT9742B	RT9742C	RT9742D	RT9742E	RT9742F	RT9742G	RT9742H	RT9742J	RT9742K	RT9742L	RT9742M	RT9742N	RT9742P	RT9742Q	RT9742R	RT9742S	RT9742U	RT9742V
Status	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active	Active
Number of Outputs	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1	1
Vin (min) (V)	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7	2.7
Vin (max) (V)	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6	6
Ron (typ) (mOhm)	55	55	55;70	55;70	55;70	55;70	55;70	55;70	70	70	70	70	55;70	55	70	70	70	70	70
Iq (typ) (mA)	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.03
Current Limit (typ) (A)	3.3	3.3	2.2	2.2	1.65	1.65	1.1	1.1	2.15	1.65	1.1	1.65	2.75	2.75	0.7	0.7	0.7	1.65	2.2
FLAG Indicator	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	No	No	No	Yes	Yes	Yes	Yes	Yes	No	Yes	Yes
Iocp Adjustable	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No	No
Safety	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL	Nemko;UL
Switch Type	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch	Power Switch
Features	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP	Enable Input;OCP;SCP
Package Type	TSOT-25(FC)	TSOT-25(FC)	TSOT-25;TSOT-25(FC)	TSOT-25;TSOT-25(FC)	TSOT-25;TSOT-25(FC)	TSOT-25;TSOT-25(FC)	TSOT-25;TSOT-25(FC)	TSOT-25;TSOT-25(FC)	SOT-23	SOT-23	SOT-23	TSOT-25	TSOT-25(FC)	TSOT-25(FC)	TSOT-25	TSOT-25	SOT-23	TSOT-25	TSOT-25

關鍵特性

70mΩ/55mΩ（典型值） N-MOSFET 開關
工作電壓範圍：2.7V~6V
具有反向電流阻止能力
欠壓鎖定保護
可消除抖動的故障指示
具有電流折返特性的過熱保護
過流保護
短路保護
UL認證編號：E219878
Nemko認證編號：NO87949

Datasheet
Title	Version	Last Update	Download
RT9742: 70mΩ/55mΩ, 3A/2.5A/2A/1.5A/1A/0.5A 高側功率開關	V10.0	2015/07/20

Technical Documents
Title	Item Type	Last Update	Download
立錡全系列產品選擇指南 [Jan., 2024]	Selection Guide	2024/01/19
電源IC輸入端的過應力分析	App. Note	2016/07/01

Videos
Title	Last Update	Views
為應用選擇最適合的電源管理組件	2014/10/28	139

Evaluation Boards
Title	Last Update	Download
55mΩ, 3A High-Side Power Switches with Flag	2015/10/30

Part Number	Package Type	Package Qty.	Free Sample	Distributor	Stock	Buy From Authorized Distributor
RT9742AGJ5F	TSOT-25(FC)	3,000	Request	Digikey	2,645	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742ANGJ5F	TSOT-25(FC)	3,000	Request	Digikey	7,673	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742BGJ5F	TSOT-25(FC)	3,000	Request	Digikey	1,331	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742CGJ5	TSOT-25	3,000	Request	Digikey	1,345	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742CGJ5F	TSOT-25(FC)	3,000	Request	Digikey	20,934	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742DGJ5	TSOT-25	3,000	Request	Digikey	2,817	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742EGJ5	TSOT-25	3,000	Request	Digikey	4,669	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742FGJ5	TSOT-25	3,000	Request	Digikey	1,148	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742GGJ5	TSOT-25	3,000	Request	Digikey	6,264	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742QGJ5	TSOT-25	3,000	Request	Digikey	3,698	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742QNGJ5	TSOT-25	3,000	Request	Digikey	632	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742SNGV	SOT-23	3,000	Request	Digikey	Lead-Time: 14 weeks	Not Available
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742UNGJ5	TSOT-25	3,000	Request	Digikey	1,236	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT9742VGJ5	TSOT-25	3,000	Request	Digikey	3,520	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available

Evaluation Board
Part Number	Distributor	Stock	Buy From Authorized Distributor
EVB_RT9742AGJ5F	Digikey	Lead-Time: 14 weeks	Not Available
	Mouser	Lead-Time: 14 weeks	Not Available
	WPG	Lead-Time: 14 weeks	Not Available

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