4.5V至5.5V可调输出40μA的低静态电流8A同步DC/DC降压变换器CXSD62369负载的1%输出精度6V至28V适配器或电池输入

CXSD62369是一个8A同步DC/DC降压变换器，集成了20mΩN沟道高侧MOSFET和17mΩN沟道低侧MOSFET。它使用恒定的实时控制方案来轻松处理宽的输入/输出电压比，并在保持相对恒定的开关频率的同时，提供对负载瞬变的100ns“瞬时通电”响应。

目录

1.产品概述       2.产品特点     

3.应用范围       4.技术规格书下载（PDF文档）

5.产品封装       6.电路原理图  

7.相关产品

   产品概述 返回TOP

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      CXSD62369 CXSD62370A CXSD62370B is a 8A, synchronous DC/DC buck converter with integrated 20mΩ N-channel high-side MOSFET and 17mΩ N-channel low-side MOSFET. It uses constant on-time control scheme to handle wide input/output voltage ratios with ease and provides 100ns “instant-on” response to load transients while maintaining a relatively constant switching frequency. The CXSD62369 CXSD62370A CXSD62370B achieves high efficiency at a reduced cost by eliminating the current-sense resistor found in traditional current-mode PWMs. Single-stage buck conversion allows these devices to directly step down high-voltage batteries for the highest possible efficiency. The built-in 5V LDO supports 80mA for internal circuit with automatic bootstrapping to DC/DC converter output. The CXSD62369 CXSD62370A CXSD62370Bis intended for the 5V system power supply of Notebook Computer. The CXSD62369 CXSD62370A CXSD62370Bis available in QFN4X4-28 package.

   产品特点 返回TOP

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„ Ultra-High Efficiency 

„ Low Quiescent Current of 40μA 

„ Integrated 17mΩ at VCC=5V N-Channel MOSFET for Low Side 

„ Integrated 20mΩ at VCC=5V N-Channel MOSFET for High Side 

„ No Current-Sense Resistor (Lossless ILIMIT) 

„ Quasi-PWM with 100ns Load-Step Response 

„ 1% VOUT Accuracy Over Line and Load 

„ Programmable Switching Frequency 

„ 4.5V to 5.5V Adjustable Output Range 

„ 6V to 28V Adapter or Battery Input Range 

„ Noiseless Pulse-skipping Mode (25kHz min) 

„ VCLK Output 

„ Integrated Boost Switch 

„ OVP & UVP 

„ Over Temperature Protection (non-latch) 

„ 3.3ms Soft-Start 

„ Power-Good Indicator 

„ Fixed 5V, 80mA Bootstrapped Linear Regulator

   应用范围 返回TOP

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„ Notebook Computers 

„ I/O Supply 

„ Networking Power Supply

   技术规格书（产品PDF) 返回TOP 

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     需要详细的PDF规格书请扫一扫微信联系我们，还可以获得免费样品以及技术支持！

 

产品封装图 返回TOP

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电路原理图 返回TOP

 

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Point Of Load(Synchronous Quasi-PWM Step Down Converter)
Part   NO.	Vin(V) min.	Vin(V) max.	Ilimit (V)	FSW (kHz)	FB(V)	HSRON (mohm)	LSRON (mohm)	Note	Package
CXSD62363	4.5	28	10	ADJ	0.75	20	8.5	With 5V Supply, EN, PGOOD	QFN4X4-28 QFN5X5-32
CXSD62364	4.5	28	10	ADJ	0.75	20	8.5	EN, PGOOD,   ILMIT set by R	QFN4X4-28
CXSD62365	4.5	28	8	ADJ	0.75	20	20	With 5V   Supply, EN, PGOOD	QFN4X4-28 QFN5X5-32
CXSD62366	4.5	28	6	ADJ	0.75	20	20	EN, PGOOD, ILMIT set by R	QFN4X4-28
CXSD62367	4.5	28	8	ADJ	0.9	30	15	With 5V Supply, EN, PGOOD, Low Iq	QFN3X3-21
CXSD62367A	4.5	28	4	ADJ	0.9	30	30	With 5V Supply, EN, PGOOD, Low Iq	QFN3X3-21
CXSD62368	4.5	28	10	ADJ	0.8	20	8.5	EN, PGOOD, MLCC, Soft Start adjustable	QFN4X4-23  2 Thermal Pads
CXSD62369	5.5	28	8	ADJ	5.05	20	17	5V System Power Rail,LDO5 Switchover5V,ON5, ENL,PGOOD,Low Iq,MLCC,Ultrasonic with VCLK	QFN4X4-28  2 Thermal Pads
CXSD62370A	5.5	28	10	ADJ	5.05	20	8.5	5V System  Power Rail, LDO5 Switchover5V, ON5 ENL,PGOOD,Low Iq,MLCC,Ultrasonic   with VCLK	QFN4X4-28, 2 Thermal Pads
CXSD62370B	5.5	28	8	ADJ	3.33	20	17	3V System Power Rail, LDO3 Switchover3V, ON3, ENL,PGOOD,Low Iq,MLCC,Ultrasonic with VCLK	QFN4X4-28  2 Thermal Pads
CXSD62371	3	28	8	ADJ	0.75	30	15	EN, PGOOD, Low   Iq, MLCC	QFN3X3-24     2 Thermal Pads
CXSD62372	5.5	28	8	ADJ	0.9	30	15	With   5V Supply, EN, PGOOD, Low Iq, MLCC	QFN3X3-24     2 Thermal Pads
CXSD62372A	5.5	28	4	ADJ	0.9	30	30	With 5V   Supply, EN, PGOOD, Low Iq, MLCC	QFN3X3-24    2 Thermal Pads
CXSD62373	3	28	10	ADJ	0.75	20	8.5	EN,   PGOOD, Low Iq, MLCC	QFN4X4-28     2 Thermal Pads
CXSD62373A	3	28	8	ADJ	0.75	30	15	EN, PGOOD, Low   Iq, MLCC	QFN4X4-28  2 Thermal Pads