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

A4403GEU-T

更新时间： 2024-02-18 21:11:48

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
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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

In terms of grounding the power components, a star connection

should be made to minimize the ground loop impedances. Note

that, although a ground plane may be required to meet the ther-

mal characteristics of the solution, it is still imperative to imple-

ment a star ground connection for the power components.

• The inductor L should placed as close as possible to the LX

terminal and to the output capacitors C_OUT

• Good separation should exist between the LX connection and

any adjacent components or traces.

Figure 6 shows the current conduction path during the off-cycle

of the switching FET. The following points should be noted:

Figures 5 and 6 illustrate the importance of keeping the ground

connections as short as possible and forming good star connec-

tions.

• The diode D should be placed as close as possible to both the

switching FET and to the inductor. The resistor R should be

placed as close as possible to the diode D.

Figure 5 also illustrates the current conduction paths during the

on-cycle of the switching FET. The following points should be

noted:

• The boostrap capacitor, C2, and the soft start capacitor, C5,

should be located as close as possible to their respective termi-

nal connections. The ground reference of the soft start capacitor

should be connected as close to the GND terminal as possible.

• The capacitor C_INshould be placed as close as possible to the

VIN terminal.

V_IN

9 to 46 V

BOOT

V_OUT

5.0 V

3 A

22 nF

VIN

6.3 μH

2.2 μF

100 V

100 kΩ

ISEN

TON

DIS

10 μF

6.3 V

10 μF

6.3 V

A4403

47 Ω

1 nF

100 mΩ

3.92 kΩ

10 nF

SGND

47 nF

750 Ω

GND

Switching Frequency = 1 MHz

All capacitors are X5R or X7R ceramic

Resistors R3 and R4 should be surface mount, low inductance type, rated at 250 mW at 70°C

Figure 7. Typical application

Allegro MicroSystems, Inc.

115 Northeast Cutoff

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

1.508.853.5000; www.allegromicro.com

1...11 12 131415

中文翻译

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与A4403GEU-T相关器件

型号	品牌	获取价格	描述	数据表
A4403GEUTR-T	ALLEGRO	获取价格	Valley Current Mode Control Buck Converter
A4405	ALLEGRO	获取价格	The A4405 is an automotive power management IC that uses a high frequency constant on-time
A4406	ALLEGRO	获取价格	The A4406 is an automotive power management IC that uses a high frequency constant on-time
A4407	ALLEGRO	获取价格	The A4407 is an automotive power management IC that uses a 2.2 MHz constant on-time (COT)
A4408	ALLEGRO	获取价格	PWM frequency can be synchronized to external clock
A4408KLVTR-T	ALLEGRO	获取价格	PWM frequency can be synchronized to external clock
A4409	ALLEGRO	获取价格	Buck or buck-boost pre-regulator
A4409KLPTR-T	ALLEGRO	获取价格	Buck or buck-boost pre-regulator
A440F002300100	LITTELFUSE	获取价格	GAS DISCHARGE TUBE - 8x10mm
A440F002500100	LITTELFUSE	获取价格	GAS DISCHARGE TUBE - 8x10mm

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