Richtek

RT6219

23V, 4A, 500kHz, ACOT^® 同步 Buck 转换器

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RT6219 是采用 ACOT^® 控制架构的同步 Buck 转换器，无需使用外部补偿元件即可拥有极快的瞬态响应特性。它可在 5V~23V 输入电压范围内工作，具有过流保护、欠压保护、过压保护等保护特性，还有 1.5ms 的软启动设计和开漏 Power Good 指示信号输出。

应用

便携式电脑
平板电脑
网络设备
服务器
视频录像机
平板电视和监视器
分布式电源系统

主要规格
	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

关键特性

输入电压范围：5V~23V
输出电压可调范围：0.6V~5V
98% 最大占空比，支持 2 节电芯配置
PWM 工作频率：500kHz
采用 ACOT^® 控制架构，瞬态响应速度快
集成 67mΩ/41mΩ MOSFET 功率开关
稳定配合 MLCC 输出电容
1.5ms 内置软启动
内建 OVP/UVP/OCP
Power Good 指示
过热关机保护

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

Technical Documents
Title	Item Type	Last Update	Download
立锜精选产品 Product Tree 手册 [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
Buck转换器的选择标准	App. Note	2015/05/01
降压转换器架构之比较	App. Note	2015/01/01
ACOT^® 穩定度測試	App. Note	2013/11/01

Videos
Title	Last Update	Views
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	1078

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

Reference Design
Title	Last Update	Download
立锜负载瞬变测试工具	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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