CXSD61055A step-down DC/DC converter wide 4.5V to 21V input voltage range 2A continuous load current capability

Time of publication：2020-04-10Number of views：58

目录jrH嘉泰姆

1.产品概述         2.产品特点jrH嘉泰姆
3.应用范围       4.下载产品资料PDF文档 jrH嘉泰姆
5.产品封装图                     6.电路原理图             jrH嘉泰姆
7.功能概述       8.相关产品jrH嘉泰姆

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一,产品概述(General Description) jrH嘉泰姆

The CXSD61055A is a synchronous step-down DC/DC converter that jrH嘉泰姆

provides wide 4.5V to 21V input voltage range and 2A continuous load current capability.jrH嘉泰姆
The CXSD61055A fault protection includes cycle-by-cycle current limit, jrH嘉泰姆

UVLO, output overvoltage protection and thermal shutdown. The adjustable jrH嘉泰姆

soft-start function prevents inrush current at turn-on. This device uses currentjrH嘉泰姆

mode control scheme which provides fast transient response. Internal compensation function reduces external compensation jrH嘉泰姆

components and simplifies the design process. In shutdown mode, the supplyjrH嘉泰姆

current is less than 1μA.jrH嘉泰姆

The CXSD61055A is available in SOT-23-6 package and provides good thermal conductance.jrH嘉泰姆
二.产品特点(Features)jrH嘉泰姆

High Efficiency up to 94%jrH嘉泰姆
Low RDS(ON) Integrated Power MOSFETjrH嘉泰姆
Internal Compensation FunctionjrH嘉泰姆
Wide Input Voltage Range: 4.5V to 21VjrH嘉泰姆
Adjustable Output Voltage from 0.8V to 17.85VjrH嘉泰姆
2A Output CurrentjrH嘉泰姆
Fixed 600KHz Switching FrequencyjrH嘉泰姆
Current Mode OperationjrH嘉泰姆
Cycle-by-Cycle Current LimitjrH嘉泰姆
Over-Temperature Protection with Auto RecoveryjrH嘉泰姆
Output Overvoltage ProtectionjrH嘉泰姆
Under Voltage LockoutjrH嘉泰姆
<1μA Shutdown CurrentjrH嘉泰姆
SOT-23-6 PackagejrH嘉泰姆
三,应用范围 (Applications)jrH嘉泰姆

STB (Set-Top-Box)jrH嘉泰姆
LCD Display, TVjrH嘉泰姆
Distributed Power SystemjrH嘉泰姆
Networking, XDSL ModemjrH嘉泰姆
四.技术规格书下载（产品PDF）jrH嘉泰姆

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！jrH嘉泰姆

QQ截图20160419174301.jpg jrH嘉泰姆

五,产品封装图 (Package)jrH嘉泰姆

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I/OjrH嘉泰姆	Pin NamejrH嘉泰姆	Pin No.jrH嘉泰姆	Pin FunctionjrH嘉泰姆
IjrH嘉泰姆	FBjrH嘉泰姆	3jrH嘉泰姆	Voltage Feedback Input Pin. Connect FB and VOUT with a resistive voltage divider. This ICjrH嘉泰姆 senses feedback voltage via FB and regulates it at 0.8V.jrH嘉泰姆
IjrH嘉泰姆	VINjrH嘉泰姆	5jrH嘉泰姆	Power Supply Input Pin. Drive VIN pin by 4.5V to 21V voltage to power on the chip.jrH嘉泰姆
IjrH嘉泰姆		4jrH嘉泰姆	Enable Input Pin. This pin is a digital control input which turns the converter on or off. Connect tojrH嘉泰姆 VIN with a 100kΩ resistor for self-startup.jrH嘉泰姆
IjrH嘉泰姆	GNDjrH嘉泰姆	2jrH嘉泰姆	Ground Pin.jrH嘉泰姆
OjrH嘉泰姆	LXjrH嘉泰姆	6jrH嘉泰姆	Power Switching Output. LX is the output of the internal high side NMOS switch.jrH嘉泰姆
OjrH嘉泰姆	BSTjrH嘉泰姆	1jrH嘉泰姆	High Side Gate Drive Boost Pin. A capacitor rating between 10nF~100nF must be connected fromjrH嘉泰姆 this pin to LX. It can boost the gate drive to fully turn on the internal high side NMOS.jrH嘉泰姆

六.电路原理图jrH嘉泰姆

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VOUTjrH嘉泰姆	C1jrH嘉泰姆	R1jrH嘉泰姆	R2jrH嘉泰姆	C9jrH嘉泰姆	C4jrH嘉泰姆	L1jrH嘉泰姆	C2jrH嘉泰姆
1.2VjrH嘉泰姆	10μF MLCC x2jrH嘉泰姆	4.99kΩjrH嘉泰姆	10kΩjrH嘉泰姆	--jrH嘉泰姆	200pF~1nFjrH嘉泰姆	2.2μHjrH嘉泰姆	22μF MLCC x2jrH嘉泰姆
1.8VjrH嘉泰姆	10μF MLCC x2jrH嘉泰姆	4.99kΩjrH嘉泰姆	3.92kΩjrH嘉泰姆	--jrH嘉泰姆	200pF~1nFjrH嘉泰姆	2.2μHjrH嘉泰姆	22μF MLCC x2jrH嘉泰姆
2.5VjrH嘉泰姆	10μF MLCC x2jrH嘉泰姆	4.99kΩjrH嘉泰姆	2.32kΩjrH嘉泰姆	--jrH嘉泰姆	200pF~1nFjrH嘉泰姆	4.7μHjrH嘉泰姆	22μF MLCC x2jrH嘉泰姆
3.3VjrH嘉泰姆	10μF MLCC x2jrH嘉泰姆	30.9kΩjrH嘉泰姆	9.76kΩjrH嘉泰姆	--jrH嘉泰姆	200pF~1nFjrH嘉泰姆	4.7μHjrH嘉泰姆	22μF MLCC x2jrH嘉泰姆
5VjrH嘉泰姆	10μF MLCC x2jrH嘉泰姆	30.9kΩjrH嘉泰姆	5.76kΩjrH嘉泰姆	--jrH嘉泰姆	200pF~1nFjrH嘉泰姆	4.7μHjrH嘉泰姆	22μF MLCC x2jrH嘉泰姆
1.2VjrH嘉泰姆	100μF EC x1jrH嘉泰姆	4.99kΩjrH嘉泰姆	10kΩjrH嘉泰姆	0.1μFjrH嘉泰姆	--jrH嘉泰姆	2.2μHjrH嘉泰姆	100μF EC x1jrH嘉泰姆
1.8VjrH嘉泰姆	100μF EC x1jrH嘉泰姆	4.99kΩjrH嘉泰姆	3.92kΩjrH嘉泰姆	0.1μFjrH嘉泰姆	--jrH嘉泰姆	2.2μHjrH嘉泰姆	100μF EC x1jrH嘉泰姆
2.5VjrH嘉泰姆	100μF EC x1jrH嘉泰姆	4.99kΩjrH嘉泰姆	2.32kΩjrH嘉泰姆	0.1μFjrH嘉泰姆	--jrH嘉泰姆	4.7μHjrH嘉泰姆	100μF EC x1jrH嘉泰姆
3.3VjrH嘉泰姆	100μF EC x1jrH嘉泰姆	30.9kΩjrH嘉泰姆	9.76kΩjrH嘉泰姆	0.1μFjrH嘉泰姆	--jrH嘉泰姆	4.7μHjrH嘉泰姆	100μF EC x1jrH嘉泰姆
5VjrH嘉泰姆	100μF EC x1jrH嘉泰姆	30.9kΩjrH嘉泰姆	5.76kΩjrH嘉泰姆	0.1μFjrH嘉泰姆	--jrH嘉泰姆	4.7μHjrH嘉泰姆	100μF EC x1jrH嘉泰姆

七,功能概述jrH嘉泰姆

Absolute Maximum Ratings (Note 1)jrH嘉泰姆

● Supply Voltage VIN ----------------------------------------------------------------------------- -0.3V to +23VjrH嘉泰姆

● Enable Voltage SH------------------------------------------------------------------------ -0.3V to +23VjrH嘉泰姆

● LX Voltage VLX (50ns) ---------------------------------------------------------------------- -1V to VIN+0.3VjrH嘉泰姆
● BST Pin Voltage VBST ----------------------------------------------------------------------- VLX-0.3V to VLX+6VjrH嘉泰姆
● All Other Pins Voltage -------------------------------------------------------------------------- -0.3V to +6VjrH嘉泰姆
● Maximum Junction Temperature (TJ) ---------------------------------------------------- +150°CjrH嘉泰姆
● Storage Temperature (TS) -------------------------------------------------------------------- -65°C to +150°CjrH嘉泰姆
● Lead Temperature (Soldering, 10sec.) --------------------------------------------------- +260°CjrH嘉泰姆
● Package Thermal Resistance, (θJA) SOT-23-6 ------------------------------------------------ +250°C/WjrH嘉泰姆
● Package Thermal Resistance, (θJC) SOT-23-6 ---------------------------------------------------- +110°C/WjrH嘉泰姆
八,相关芯片选择指南 更多同类产品......jrH嘉泰姆

高压同步DC-DC降压ICjrH嘉泰姆
型号jrH嘉泰姆	输入耐压jrH嘉泰姆	输出电压jrH嘉泰姆	输出电流jrH嘉泰姆	反馈电压jrH嘉泰姆	工作频率jrH嘉泰姆	效率jrH嘉泰姆	静态工jrH嘉泰姆作电流jrH嘉泰姆	待机电流jrH嘉泰姆	封装jrH嘉泰姆
CXSD61049jrH嘉泰姆	8V-35VjrH嘉泰姆	可调输出jrH嘉泰姆带线损补偿jrH嘉泰姆	2A/带可调恒流设置jrH嘉泰姆	1.21VjrH嘉泰姆	130KjrH嘉泰姆	95%jrH嘉泰姆	1.3mAjrH嘉泰姆	112uAjrH嘉泰姆	SOP-8jrH嘉泰姆
CXSD61050jrH嘉泰姆	8V-35VjrH嘉泰姆	可调输出/带线损jrH嘉泰姆补偿带使能端jrH嘉泰姆	2A/带可调恒流设置jrH嘉泰姆	1.21VjrH嘉泰姆	130KjrH嘉泰姆	93%jrH嘉泰姆	1.3mAjrH嘉泰姆		SOP-8jrH嘉泰姆
CXSD61046jrH嘉泰姆	4.5-20VjrH嘉泰姆	可调输出jrH嘉泰姆	2.0AjrH嘉泰姆	0.923VjrH嘉泰姆	340KjrH嘉泰姆	95%jrH嘉泰姆	1mAjrH嘉泰姆	6uAjrH嘉泰姆	SOP-8jrH嘉泰姆
CXSD61046A/BjrH嘉泰姆	4.5-27VjrH嘉泰姆	可调输出jrH嘉泰姆	2.0A/2.5AjrH嘉泰姆	0.925VjrH嘉泰姆	340KjrH嘉泰姆	96%jrH嘉泰姆	1.3mAjrH嘉泰姆	0.3uAjrH嘉泰姆	SOP-8jrH嘉泰姆
CXSD61048jrH嘉泰姆	8V--35VjrH嘉泰姆	可调输出jrH嘉泰姆带线损补偿jrH嘉泰姆	2.0A/带可调限流保护jrH嘉泰姆	1.2VjrH嘉泰姆	100-500KjrH嘉泰姆	93%jrH嘉泰姆	750uAjrH嘉泰姆	110uAjrH嘉泰姆	ESOP-8jrH嘉泰姆
CXSD61048AjrH嘉泰姆	10V--35VjrH嘉泰姆	可调输出jrH嘉泰姆带线损补偿jrH嘉泰姆	2.5A/带可调限流保护jrH嘉泰姆	1.2VjrH嘉泰姆	100-500K可调jrH嘉泰姆	93%jrH嘉泰姆	15mAjrH嘉泰姆	110uAjrH嘉泰姆	SOP-8jrH嘉泰姆
CXSD61048BjrH嘉泰姆	8V-35VjrH嘉泰姆	可调输出jrH嘉泰姆带线损补偿jrH嘉泰姆	2.8A/带可调限流保护jrH嘉泰姆	1.21VjrH嘉泰姆	100-500K可调jrH嘉泰姆	93%jrH嘉泰姆	15mAjrH嘉泰姆	110uAjrH嘉泰姆	SOP-8jrH嘉泰姆
CXSD61048CjrH嘉泰姆	8V-35VjrH嘉泰姆	可调输出jrH嘉泰姆带线损补偿jrH嘉泰姆	3.2A/带可调限流保护jrH嘉泰姆	1.21VjrH嘉泰姆	100-500K可调jrH嘉泰姆	93%jrH嘉泰姆	15mAjrH嘉泰姆	110uAjrH嘉泰姆	SOP-8jrH嘉泰姆
CXSD61047jrH嘉泰姆	4.6-22VjrH嘉泰姆	可调输出jrH嘉泰姆	3.0AjrH嘉泰姆	0.923VjrH嘉泰姆	340KjrH嘉泰姆	95%jrH嘉泰姆	55uAjrH嘉泰姆	1uAjrH嘉泰姆	ESOP8jrH嘉泰姆
CXSD61047AjrH嘉泰姆	4.5-27VjrH嘉泰姆	可调输出jrH嘉泰姆	3.0AjrH嘉泰姆	0.925VjrH嘉泰姆	340KjrH嘉泰姆	93%jrH嘉泰姆	1.3mAjrH嘉泰姆	0.3uAjrH嘉泰姆	ESOP8jrH嘉泰姆
CXSD61047BjrH嘉泰姆	4.5V-23VjrH嘉泰姆	可调输出jrH嘉泰姆	3.5AjrH嘉泰姆	0.925VjrH嘉泰姆	340KjrH嘉泰姆	96%jrH嘉泰姆	2.5mAjrH嘉泰姆		ESOP-8jrH嘉泰姆
CXSD61051jrH嘉泰姆	8V-35VjrH嘉泰姆	可调输出jrH嘉泰姆带线损补偿jrH嘉泰姆	扩流4.5A带jrH嘉泰姆可调限流保护jrH嘉泰姆	1.21VjrH嘉泰姆	100-500K可调jrH嘉泰姆	95%jrH嘉泰姆	14mAjrH嘉泰姆	100uAjrH嘉泰姆	ESOP8jrH嘉泰姆
CXSD61052jrH嘉泰姆	3.6-40VjrH嘉泰姆	可调输出jrH嘉泰姆	2.0AjrH嘉泰姆	0.8VjrH嘉泰姆	440KjrH嘉泰姆	94%jrH嘉泰姆	74uAjrH嘉泰姆	0.07uAjrH嘉泰姆	ESOP-8jrH嘉泰姆
CXSD61053jrH嘉泰姆	4.5-20VjrH嘉泰姆	可调输出jrH嘉泰姆	4.0AjrH嘉泰姆	0.923VjrH嘉泰姆	340KjrH嘉泰姆	95%jrH嘉泰姆	1.6mAjrH嘉泰姆	6uAjrH嘉泰姆	ESOP8jrH嘉泰姆
CXSD61054jrH嘉泰姆	3.5-23VjrH嘉泰姆	可调输出jrH嘉泰姆	2.0AjrH嘉泰姆	0.6VjrH嘉泰姆	600KjrH嘉泰姆	96%jrH嘉泰姆	400uAjrH嘉泰姆	1uAjrH嘉泰姆	SOT-26jrH嘉泰姆
CXSD61055jrH嘉泰姆	4.5-17VjrH嘉泰姆	可调输出jrH嘉泰姆	2.0AjrH嘉泰姆	0.6VjrH嘉泰姆	600KjrH嘉泰姆	96%jrH嘉泰姆	400uAjrH嘉泰姆	1uAjrH嘉泰姆	SOT-26jrH嘉泰姆
CXSD61055AjrH嘉泰姆	4.5V-23VjrH嘉泰姆	可调输出jrH嘉泰姆	2.0AjrH嘉泰姆	0.8VjrH嘉泰姆	600KjrH嘉泰姆	92%jrH嘉泰姆	800uAjrH嘉泰姆		SOT-26jrH嘉泰姆
CXSD61055BjrH嘉泰姆	3.3-17VjrH嘉泰姆	可调输出jrH嘉泰姆	2.0AjrH嘉泰姆	0.6VjrH嘉泰姆	600KjrH嘉泰姆	96%jrH嘉泰姆	400uAjrH嘉泰姆	4uAjrH嘉泰姆	SOT-26jrH嘉泰姆
CXSD61056jrH嘉泰姆	4.5-26VjrH嘉泰姆	可调输出jrH嘉泰姆	1.2AjrH嘉泰姆	0.8VjrH嘉泰姆	1.4MjrH嘉泰姆	94%jrH嘉泰姆	600uAjrH嘉泰姆	1uAjrH嘉泰姆	SOT-26jrH嘉泰姆
CXSD61057jrH嘉泰姆	4.0-42VjrH嘉泰姆	可调输出jrH嘉泰姆	1.5AjrH嘉泰姆	0.8VjrH嘉泰姆	650KjrH嘉泰姆	91%jrH嘉泰姆	600uAjrH嘉泰姆	6uAjrH嘉泰姆	SOT-26jrH嘉泰姆

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