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参数资料
| 型号： | A8499SLJTR-T |
| 厂商： | Allegro Microsystems Inc |
| 文件页数： | 2/7页 |
| 文件大小： | 0K |
| 描述： | IC REG BUCK ADJ 2A 8SOIC |
| 标准包装： | 1 |
| 类型： | 降压（降压） |
| 输出类型： | 可调式 |
| 输出数： | 1 |
| 输出电压： | 1.2 V ~ 24 V |
| 输入电压： | 8 V ~ 50 V |
| PWM 型： | 电流模式 |
| 电流 - 输出： | 2A |
| 同步整流器： | 无 |
| 工作温度： | -20°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-SOIC（0.154"，3.90mm Width）裸露焊盘 |
| 包装： | 标准包装 |
| 供应商设备封装： | 8-SOIC-EP |
| 其它名称： | 620-1102-6 |
A8499
Functional Block Diagram
High Voltage Step-Down Regulator
BOOT
Boot Charge
VIN
V IN
VOUT
LX
D1
L1
ESR
COUT
μC
ENB
Switch
Disable
Switch PWM
Clamp
TSET
I_Peak
+
–
I_Demand
–
FB
VBIAS is connected to VOUT
GND
UVLO
COMP
Bias Supply
VBIAS
when V OUT target is between
3.3 and 5 V
TSD
Soft Start
Ramp Generation
1.2 V
R θ JA
(°C/W)
Absolute Maximum Ratings
Supply Voltage, V IN ......................................................................... 50 V
VBIAS Input Voltage, V BIAS ................................................. –0.3 to 7 V
Switch Voltage, V LX ......................................................................... –1 V
ENB Input Voltage, V ENB ...................................................... –0.3 to 7 V
Junction Temperature, T J(max) ....................................................... 150°C
Storage Temperature, T S ............................................... –55°C to 150°C
Operating Ambient Temperature, T A ............................... –20°C to 85°C
Ordering Information
Use the following complete part numbers when ordering:
Package Thermal Characteristics*
Package PCB
LJ 35 4-layer
* Additional information is available on the Allegro Web site
Part Number a
A8499SLJTR-T
Packing b
13 in. reel, 3000 pieces/reel
Description
LJ package, SOIC surface mount with
exposed thermal pad
a Leadframe
plating 100% matte tin.
b Contact Allegro
for additional packing options.
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
2
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