参数资料
型号: A8499SLJTR-T
厂商: Allegro Microsystems Inc
文件页数: 6/7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:
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
13.0
12.5
12.0
High Voltage Step-Down Regulator
RTSET Value versus V IN /V OUT
11.5
11.0
10.5
10.0
Violation of
Minimum On-Time
um
in
lu
ET
R
9.5
9.0
8.5
8.0
7.5
7.0
6.5
6.0
5.5
M
im
Va
e
TS
of
Safe Operating Area
5.0
4.5
4.0
3.5
3.0
2.5
2.0
R TSET (k )
Typical Application Circuit
+12 V
CBOOT
0.01 μ F
C2
0.1 μ F
C1
22 μ F/ 25 V
RTSET
30.1 k Ω
BOOT
ENB
TSET
GND
A 8499
VIN
LX
VBIAS
FB
L1
47 μ H
R1
VOUT
5.0 V / 1.8 A
COUT
330 μ F/ 6.3 V
(Aluminum)
10 k Ω
D1
B340
R2
3.16 k Ω
1 2 V step down to 5.0 V at 1.8 A
Pin-out Diagram
Terminal List Table
Pin Name
BOOT
Pin Description
Gate drive boost node
Pin Number
1
BOOT
ENB
TSET
GND
1
2
3
4
Pad
8
7
6
5
VIN
LX
VBIAS
FB
ENB
TSET
GND
NC
NC
On/off control logic input
Off-time setting
Ground
No connect
No connect
2
3
4
N/A
N/A
FB
VBIAS
LX
VIN
Pad
Feedback for adjustable regulator
Bias supply input
Buck switching node
Supply input
Exposed pad for thermal dissipation
5
6
7
8
Pad
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
6
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