Datasheet > 电源电路 > 开关式稳压器或控制器> A4403GEU-T

A4403GEU-T

更新时间： 2024-02-06 07:30:01

品牌	Logo	应用领域
急速微 - ALLEGRO		转换器稳压器开关式稳压器或控制器电源电路开关式控制器
页数	文件大小	规格书
15页	335K
描述
Valley Current Mode Control Buck Converter

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技术参数
数据手册

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A4403GEU-T 技术参数

是否无铅：	不含铅	是否Rohs认证：	符合
生命周期：	Active	零件包装代码：	QFN
包装说明：	HVQCCN, LCC16,.16SQ,25	针数：	16
Reach Compliance Code：	compliant	ECCN代码：	EAR99
HTS代码：	8542.39.00.01	风险等级：	1.69
模拟集成电路 - 其他类型：	SWITCHING REGULATOR	控制模式：	CURRENT-MODE
控制技术：	PULSE FREQUENCY MODULATION	最大输入电压：	46 V
最小输入电压：	9 V	JESD-30 代码：	S-XQCC-N16
JESD-609代码：	e3	长度：	4 mm
湿度敏感等级：	2	功能数量：	1
端子数量：	16	最高工作温度：	105 °C
最低工作温度：	-40 °C	最大输出电流：	4.2 A
封装主体材料：	UNSPECIFIED	封装代码：	HVQCCN
封装等效代码：	LCC16,.16SQ,25	封装形状：	SQUARE
封装形式：	CHIP CARRIER	峰值回流温度（摄氏度）：	260
认证状态：	Not Qualified	座面最大高度：	0.8 mm
子类别：	Switching Regulator or Controllers	表面贴装：	YES
切换器配置：	BUCK	最大切换频率：	2000 kHz
温度等级：	INDUSTRIAL	端子面层：	Matte Tin (Sn)
端子形式：	NO LEAD	端子节距：	0.65 mm
端子位置：	QUAD	处于峰值回流温度下的最长时间：	40
宽度：	4 mm	Base Number Matches：	1

A4403GEU-T 数据手册

Valley Current Mode Control Buck Converter

A4403

To avoid ground offset issues in the output voltage, it is highly

recommended that the ground-referenced feedback resistor R6

should be connected directly to the GND connection of the

A4403. In other words, the R6 ground return should avoid the use

of the internal ground plane.

(ISEN and SGND). Note that it is imperative that the PCB traces

between the sense resistor pads and the sense connections are as

short as possible to minimize the effects of leakage inductance.

In noisy systems, it is highly recommended that an R-C filter be

used to filter the signal produced across the ISEN pin. See the

Sense Resistor section and the Typical Application schematic.

All ground-referenced support components (C5 and the DIS

switch) should also be located as close to the GND connection as

possible. A “local quiet” ground plane around these components

can be implemented; however, this ground plane should have a

high impedance connection to the star ground connection of the

power stages, as referenced below.

If an internal ground plane is used, it is recommended that it

does not overlap the switching node, LX, to avoid the possibility

of noise pick up. To minimize the possibility of noise injection

issues, it is recommended to isolate the ground plane around the

high impedance nodes, such as FB and SS.

The sense resistor connections should be connected in a Kelvin

circuit (see figure 3) to the corresponding pins on the A4403

A4403 Support

Components

Power Circuitry

Switch

Cin

Cout

A4403

Local ‘quiet’

Ground Plane

GND

SGND

Star Connection

Thermal Vias

Internal Ground Plane

Figure 4. Ground plane configurations

VIN

Input

Voltage

Input

Voltage

V_OUT

C_IN

C_OUT

R_LOAD

Star Connection

Figure 5. FET on-cycle current conduction paths

Figure 6. FET off-cycle current conduction paths

Allegro MicroSystems, Inc.

115 Northeast Cutoff

Worcester, Massachusetts 01615-0036 U.S.A.

1.508.853.5000; www.allegromicro.com

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与A4403GEU-T相关器件

型号	品牌	描述	获取价格	数据表
A4403GEUTR-T	ALLEGRO	Valley Current Mode Control Buck Converter	获取价格
A4405	ALLEGRO	The A4405 is an automotive power management IC that uses a high frequency constant on-time	获取价格
A4406	ALLEGRO	The A4406 is an automotive power management IC that uses a high frequency constant on-time	获取价格
A4407	ALLEGRO	The A4407 is an automotive power management IC that uses a 2.2 MHz constant on-time (COT)	获取价格
A4408	ALLEGRO	PWM frequency can be synchronized to external clock	获取价格
A4408KLVTR-T	ALLEGRO	PWM frequency can be synchronized to external clock	获取价格

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