参数资料
型号: A8287SLBTR-T
厂商: Allegro Microsystems Inc
文件页数: 4/18页
文件大小: 0K
描述: IC LNB SUPPLY/VOLTAGE REG 24SOIC
标准包装: 1
应用: 转换器,模拟和数字式卫星信号接收器
输入电压: 9 V ~ 16 V
输出数: 1
输出电压: 12.7 V ~ 20.4 V
工作温度: -20°C ~ 85°C
安装类型: 表面贴装
封装/外壳: 24-SOIC(0.295",7.50mm 宽)
供应商设备封装: 24-SOIC W
包装: 标准包装
产品目录页面: 1141 (CN2011-ZH PDF)
其它名称: 620-1200-6
A8285 and
A8287
LNB Supply and Control Voltage Regulator
ELECTRICAL CHARACTERISTICS at T A = +25°C, V IN = 10 to 16 V (unless otherwise noted)
Characteristics
Set-point Accuracy, load and line
regulation
Supply Current
Symbol
V O1
I CC
I CCEN
Test Conditions
Relative to target voltage selected, with:
I LOAD = 0 to 500 mA
ENB = Low, LNB output disabled
ENB = High, LNB output enabled, I LOAD = 0mA
Min.
-4.5
Typ.
0
Max.
4.5
7
15
Units
%
mA
mA
Boost Switch-On Resistance
R DSBOOST T J = 25 ° C, I LOAD = 500mA
400
500
m ?
Switching Frequency
Switch Current Limit
Linear Regulator Voltage Drop
Slew Rate Current on TCAP
Output Voltage Slew Period
Output Reverse Current
Ripple and Noise on LNB Output
fo
? V REG
I CAP
t slew
I OR
V RN
V IN = 12 V
V BOOST – V LNB , no tone signal, I LOAD = 500 mA
Charging
Discharging
V LNB = 13 to 18 V, TCAP = 6.8 nF, I LOAD = 500
mA
ENB = Low, V LNB = 28 V with C4 fully charged
See notes 1 and 2
320
2.0
400
–12.5
7.5
352
3
600
–10
10
500
1
384
4.0
800
–7.5
12.5
5
50
kHz
A
mV
μ A
μ A
μ s
mA
mV pp
Protection Circuitry
Overcurrent Limit
Overcurrent Disable Time
V IN Undervoltage Threshold
V IN Turn-On Threshold
Power-Not-Good Flag Set
I LIM
t DIS
UV OFF
UV ON
PNG set
High limit
Low limit
Guaranteed turn-off
Guaranteed turn-on
550
400
1.2
8.65
8.75
77
700
500
9.15
9.25
85
850
600
1.7
9.65
9.75
93
mA
mA
ms
V
V
%V LNB
Power-Not-Good Flag Reset
PNG reset –
82
90
98
%V LNB
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
T J
? T J
See note 1
See note 1
165
20
°C
°C
Continued on next page
Allegro MicroSystems, LLC
115 Northeast Cutoff
Worcester, Massachusetts 01615-0036 U.S.A.
1.508.853.5000; www.allegromicro.com
4
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