参数资料
型号: A8292SETTR-T
厂商: Allegro Microsystems Inc
文件页数: 4/20页
文件大小: 0K
描述: IC REG LNB SUPPLY/CONTROL 28-MLP
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: 8 V ~ 16 V
输出数: 2
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: 28-VFQFN 裸露焊盘
供应商设备封装: 28-QFN/MLP 裸露焊盘(5x5)
包装: 标准包装
产品目录页面: 1141 (CN2011-ZH PDF)
其它名称: 620-1187-6
A8292
Dual LNB Supply and Control Voltage Regulator
ELECTRICAL CHARACTERISTICS at T A = 25°C, V IN = 8 to 16 V, unless noted otherwise 1
Characteristics
Symbol
Test Conditions
Min.
Typ.
Max.
Units
General
Set-Point Accuracy, Load and Line Regulation
Supply Current
Err
I IN(Off)
I IN(On)
Relative to selected V LNB target level,
I LOAD = 0 to 450 mA
ENB bit = 0, LNB output disabled, V IN = 12 V
ENB bit = 1, LNB output enabled, I LOAD = 0
mA, V IN = 12 V
–3
3
12.0
20.0
%
mA
mA
Boost Switch On Resistance
Switching Frequency
R DS(on)BOOST I LOAD = 450 mA
f SW
320
300
352
600
384
m Ω
kHz
Switch Current Limit
Linear Regulator Voltage Drop
TCAP Pin Current
Output Voltage Rise Time 2
Output Voltage Pull-Down Time 2
Output Reverse Current
I LIMSW
? V REG
I CHG
I DISCHG
t r(VLNB)
t f(VLNB)
I RLNB
V IN = 10 V, V OUT = 20.3 V
V BOOST – V LNB , no tone signal,
I LOAD = 450 mA
TCAP capacitor (C7) charging
TCAP capacitor (C7) discharging
For V LNB 13 → 18 V; C TCAP = 5.6 nF,
I LOAD = 450 mA
For V LNB 18 → 13 V; C LOAD = 100 μ F,
I LOAD = 0 mA
ENB bit = 0, V LNB = 33 V , BOOST capacitor
(C5) fully charged
600
–12.5
7.5
3.0
800
–10
10
500
12.5
1
1000
–7.5
12.5
5
A
mV
μ A
μ A
μ s
ms
mA
20 MHz BWL; reference circuit shown in
Ripple and Noise on LNB Output 3
V rip,n(pp)
Functional Block diagram; contact Allegro for
additional information on application circuit
30
mV PP
board design
Protection Circuitry
Output Overcurrent Limit 4
Overcurrent Disable Time
VIN Undervoltage Lockout Threshold
VIN Turn On Threshold
Undervoltage Hysteresis
Thermal Shutdown Threshold 2
Thermal Shutdown Hysteresis 2
Power Not Good Flag Set
Power Not Good Flag Reset
Power Not Good Hysteresis
Cable Disconnect Boost Voltage
Cable Disconnect Set
Cable Disconnect Current Source
I LIMLNB
t DIS
V UVLO
V IN(th)
V UVLOHYS
T J
? T J
PNG SET
PNG RESET
PNG HYS
V CAD
V CADSET
I CADSRC
V BOOST – V LNB = 800 mV
V IN falling
V IN rising
With respect to V LNB
With respect to V LNB
With respect to V LNB
CADT bit = 1, ENB bit = 1, VSEL0 through
VSEL3 = 1
V LNB = 21.00 V, V BOOST = 22.8 V
500
40.0
7.05
7.40
77
82
22.0
20.16
1.0
600
48
7.35
7.70
350
165
20
85
90
5
22.8
21.00
1.75
700
56.0
7.65
8.00
93
98
23.5
21.84
2.5
mA
ms
V
V
mV
°C
°C
%
%
%
V
V
mA
Continued on the next page…
Allegro MicroSystems, LLC
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
www.allegromicro.com
4
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