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8284 Datasheet, PDF (3/8 Pages) Allegro MicroSystems – TWO-OUTPUT LNB SUPPLY AND CONTROL-VOLTAGE REGULATOR
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8284
TWO-OUTPUT LNB SUPPLY AND
CONTROL-VOLTAGE REGULATOR
ELECTRICAL CHARACTERISTICS at TA = 25°C, OSEL = H for LNBB, OSEL = L for LNBA (each
output tested separately), ENT = L, EN = H, LLC = L, VIN = 24 V, IO = 50 mA (unless otherwise
noted).
Characteristic
Supply Voltage
Output Voltage
Symbol
VIN
VO
Line Regulation
∆VO
Load Regulation
Current-Limiting Threshold
Tone Frequency
Tone Amplitude
Tone Duty Cycle
Tone Rise or Fall Time
External Modulation Gain
External Modulation
Input Voltage
∆VO
VOM(th)
ftone
Vtone(PP)
dctone
tr, tf
Gmod
Vmod(PP)
Test Conditions
IO = 600 mA, VSEL0 = L, VSEL1 = L, LLC = L
IO = 600 mA, VSEL0 = L, VSEL1 = L, LLC = L
IO = 600 mA, VSEL0 = L, VSEL1 = L, LLC = H
IO = 600 mA, VSEL0 = L, VSEL1 = H, LLC = L
IO = 600 mA, VSEL0 = L, VSEL1 = H, LLC = H
IO = 600 mA, VSEL0 = H, VSEL1 = L, LLC = L
IO = 600 mA, VSEL0 = H, VSEL1 = L, LLC = H
IO = 600 mA, VSEL0 = H, VSEL1 = H, LLC = L
IO = 600 mA, VSEL0 = H, VSEL1 = H, LLC = H
VO = 13 V, VI = 16 to 40 V
VO = 18 V, VI = 21 to 40 V
VO = 13 or 18 V, IO = 50 to 600 mA
ENT = H
ENT = H
ENT = H
ENT = H
∆VO/∆Vmod, f = 10 Hz to 40 kHz
AC coupling
Limits
Min. Typ. Max. Units
— 3.3 + ∆VBUCK 47
V
12.5 13 13.5 V
13.4 14 14.6 V
17.3 18 18.7 V
18.2 19 19.8 V
11.5 12 12.5 V
12.5 13 13.5 V
19.2 20 20.8 V
20.2 21 21.8 V
— 4.0 40 mV
— 4.0 40 mV
— 80 180 mV
125 135 145 mV
20 22 24 kHz
550 680 800 mV
40
50
60
%
5.0 10 15 µs
— 5.0 — V/V
—
— 160 mV
External Modulation
Impedance
Zmod
f = 10 Hz to 40 kHz
— 5.0 — kΩ
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