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A4403GEU-T PDF预览

A4403GEU-T

更新时间: 2024-02-13 23:28:28
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

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: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

A4403GEU-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  

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