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A4403GEUTR-T

更新时间： 2024-11-07 11:52:39
品牌 Logo 应用领域
急速微 - ALLEGRO 转换器
页数 文件大小 规格书
15页 335K
描述
Valley Current Mode Control Buck Converter

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A4403GEUTR-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：compliantECCN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 VJESD-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 mmBase Number Matches：1

A4403GEUTR-T 数据手册

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A4403  
Valley Current Mode Control Buck Converter  
Features and Benefits  
Description  
▪ Extremely fast load-transient response with minimal  
output voltage delta  
The A4403 is a buck converter that uses valley current-mode  
control.Thiscontrolschemeallowsveryshortswitchon-times  
to be achieved, making it ideal for applications that require  
high switching frequencies combined with high input voltages  
and low output voltages.  
▪ Achieves high step-down ratios with on-times < 50 ns  
▪ User-configurable on-time, achieving switching  
frequencies up to 2 MHz  
▪ Minimal external components required  
▪ Optimized for low value filter capacitors and inductors  
▪ Wide input voltage range: 9 to 46 V  
▪ Output Current: 3 A  
▪ Low standby current <100 μA  
▪ Supplied in thermally-enhanced QFN package  
Low cost is accomplished through high switching frequencies  
of up to 2 MHz, allowing smaller and lower value inductors  
and capacitors. In addition, minimal external components are  
required through high levels of integration. Optimal drive  
circuits are utilized to minimize switching losses.  
Theswitchingfrequencyismaintainedconstant,astheon-time  
is modulated by the input voltage. This feed-forward control  
ensures excellent line correction. The on-time is set by an  
external resistor pulled-up to the input supply.  
Applications:  
▪ Printers, scanners  
▪ Cable, DSL modems/routers ▪ High power LED supply  
▪ Set top box  
▪ Network and telecom  
▪ Industrial control  
▪ Distributed power systems  
▪ Battery chargers  
▪ GPS/Infotainment  
When power is initially applied and the device is enabled, a  
user-configurablesoft-startfunctionoccurstominimizeinrush  
currentandtopreventoutputovershoot.Internalhousekeeping  
and bootstrap supplies are provided which only require the  
additionofonesmallceramiccapacitor.Atop-offchargepump  
is also provide to ensure correct operation at light loads.  
Package 16-contact QFN (suffix EU):  
Internaldiagnosticsprovidecomprehensiveprotectionagainst  
overcurrents, input undervoltages, and overtemperatures.  
The device package is a 16-contact, 4 mm × 4 mm, 0.75 mm  
nominal overall height QFN, with exposed pad for enhanced  
thermal dissipation. It is lead (Pb) free, with 100% matte tin  
leadframe plating.  
4 mm × 4 mm × 0.75 mm  
Typical Application Diagram  
VIN  
9 to 46 V  
BOOT  
LX  
VOUT  
5.0 V  
3 A  
C2  
22 nF  
VIN  
L1  
6.3 μH  
C1  
2.2 μF  
100 V  
Efficiency versus Output Current  
R1  
100 kΩ  
V
IN = 42 V  
A4403  
90.00  
85.00  
80.00  
75.00  
70.00  
65.00  
60.00  
D1  
TON  
DIS  
5 V  
C4  
10 μF  
6.3 V  
C3  
10 μF  
6.3 V  
ISEN  
3.3 V  
R5  
3.92 kΩ  
R3  
50 mΩ  
SGND  
FB  
SS  
C5  
47 nF  
R6  
750 Ω  
GND  
0
1
2
3
Output Current (A)  
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  
4403-DS, Rev. 1  
1234567...15

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