参数资料
型号: A4490EESTR-T
厂商: Allegro Microsystems Inc
文件页数: 16/17页
文件大小: 0K
描述: IC REG BUCK ADJ 1.5A TRPL 20QFN
标准包装: 1
类型: 降压(降压)
输出类型: 可调式
输出数: 3
输出电压: 可调
输入电压: 4.5 V ~ 34 V
PWM 型: 电流模式
频率 - 开关: 550kHz
电流 - 输出: 1.5A
同步整流器:
工作温度: -40°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 20-WFQFN 裸露焊盘
包装: 标准包装
供应商设备封装: 20-QFN 裸露焊盘(4x4)
产品目录页面: 1141 (CN2011-ZH PDF)
其它名称: 620-1245-6
A4490
Triple Output Step-Down Switching Regulator
Package ES, 20-Pin QFN
0.30
1
2
20
A
4.00 ±0.15
4.00 ±0.15
0.95
1
2
20
0.50
2.60
4.10
2.60
4.10
21X
D
0.08 C
SEATING
PLANE
C
C
PCB Layout Reference View
0.25 –0.07
+0.05
0.50
0.75 ±0.05
For Reference Only
(reference JEDEC MO-220WGGD)
Dimensions in millimeters
Exact case and lead configuration at supplier discretion within limits shown
A Terminal #1 mark area
B Exposed thermal pad (reference only, terminal #1
identifierappearanceatsupplierdiscretion)
0.40 –0.10
+0.15
2
1
B
2.60
C Reference land pattern layout (reference IPC7351
QFN50P400X400X80-21BM)
All pads a minimum of 0.20 mm from all adjacent pads; adjust as necessary
to meet application process requirements and PCB layout tolerances; when
mountingonamultilayerPCB,thermalviasattheexposedthermalpadland
can improve thermal dissipation (reference EIA/JEDEC Standard JESD51-5)
20
2.60
D Coplanarity includes exposed thermal pad and terminals
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
16
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