Richtek

RT6219

23V, 4A, 500kHz, ACOT^® 同步 Buck 轉換器

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RT6219 是採用 ACOT^® 控制架構的同步 Buck 轉換器，無需使用外部補償元件即可擁有極快的瞬態回應特性。它可在 5V~23V 輸入電壓範圍內工作，具有過流保護、欠壓保護、過壓保護等保護特性，還有 1.5ms 的軟啟動設計和開漏 Power Good 指示信號輸出。

應用

可擕式電腦
平板電腦
網路設備
伺服器
視頻錄影機
平板電視和監視器
分散式電源系統

主要規格
	RT6219A	RT6219B
Status	Active	Active
Vin (min) (V)	5	5
Vin (max) (V)	23	23
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)	4	4
Current Limit (typ) (A)	6	6
Freq (typ) (kHz)	500	500
Ext Sync	No	No
Ron_HS (typ) (mOhm)	67	67
Ron_LS (typ) (mOhm)	41	41
Iq (typ) (mA)	0.1	0.11
Features	ACOT Control;Built-in Bootstrap Switch;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Internal Compensation;OCP;OTP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP	ACOT Control;Built-in Bootstrap Switch;COT Control;Cycle-by-Cycle Current Limit;Diode Emulation Mode;Enable Input;Fast Transient Response;Force PWM;Internal Compensation;OCP;OTP;OVP;Power Good;SCP;Stable with Ceramic Capacitor;UVP
Package Type	WDFN3x3-10	WDFN3x3-10

關鍵特性

輸入電壓範圍：5V~23V
輸出電壓可調範圍：0.6V~5V
98% 最大占空比，支持 2 節電芯配置
PWM 工作頻率：500kHz
採用 ACOT^® 控制架構，瞬態回應速度快
集成 67mΩ/41mΩ MOSFET 功率開關
穩定配合 MLCC 輸出電容
1.5ms 內置軟啟動
內建 OVP/UVP/OCP
Power Good 指示
過熱關機保護

Datasheet
Title	Version	Last Update	Download
RT6219: 23V, 4A, 500kHz, ACOT^® 同步 Buck 轉換器	V8.0	2018/01/09

Technical Documents
Title	Item Type	Last Update	Download
立錡精選產品 Product Tree 手冊 [Aug., 2023]	Selection Guide	2023/08/07
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	522

Evaluation Boards
Title	Last Update	Download
4A, 23V, 500kHz, ACOT™ Synchronous Buck Converter	2017/09/04

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	Distributor	Stock	Buy From Authorized Distributor
RT6219AGQW	WDFN3x3-10	1,500	Request	Digikey	2,806	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT6219AHGQW	WDFN3x3-10	1,500	Request	Digikey	1,363	Buy
				Mouser	Lead-Time: 14 weeks	Not Available
				WPG	Lead-Time: 14 weeks	Not Available
RT6219BLGQW	WDFN3x3-10	1,500	Request	Digikey	251	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_RT6219AGQW	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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