A8286SETTR-TB ALLEGRO [Allegro MicroSystems], A8286SETTR-TB Datasheet - Page 4

• Manufacturer Part Number: A8286SETTR-TB
• Description: Dual LNB Supply and Control Voltage Regulator
• Manufacturer: ALLEGRO [Allegro MicroSystems]

A8286
Continued on the next page…
ELECTRICAL CHARACTERISTICS
General
Set-Point Accuracy, Load and Line Regulation
Supply Current
Boost Switch On Resistance
Switching Frequency
Switch Current Limit
Linear Regulator Voltage Drop
TCAP Pin Current
Output Voltage Rise Time
Output Voltage Pull-Down Time
Output Reverse Current
Ripple and Noise on LNB Output, Peak-to-Peak
Protection Circuitry
Output Overcurrent Limit
Overcurrent Disable Time
VIN Undervoltage Lockout Threshold
VIN Turn On Threshold
Undervoltage Hysteresis
Thermal Shutdown Threshold
Thermal Shutdown Hysteresis
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
Characteristics
2
2
2
2
Dual LNB Supply and Control Voltage Regulator
at T
2
A
= 25°C, V
R
PNG
DS(on)BOOST
V
PNG
V
PNG
Symbol
V
I
I
∆V
t
t
I
UVLOHYS
CADSRC
I
DISCHG
V
I
I
r(VLNB)
LIMLNB
V
f(VLNB)
I
CADSET
LIMSW
rip,n(pp)
V
IN(On)
IN(Off)
I
RLNB
t
∆T
f
CHG
UVLO
Err
IN(th)
SW
DIS
T
CAD
REG
RESET
J
SET
HYS
J
IN
= 8 to 16 V, unless noted otherwise
Relative to selected V
I
ENB bit = 0, LNB output disabled, V
ENB bit = 1, LNB output enabled, I
mA, V
I
V
I
TCAP capacitor (C7) charging
TCAP capacitor (C7) discharging
For V
I
For V
I
ENB bit = 0, V
(C5) fully charged
20 MHz bandwidth
V
V
With respect to V
With respect to V
With respect to V
CADT bit = 1, ENB bit = 1, VSEL0 through
VSEL3 = 1
V
LOAD
LOAD
LOAD
LOAD
LOAD
BOOST
IN
IN
LNB
falling
rising
= 21.00 V, V
LNB
LNB
= 0 to 500 mA
= 500 mA
= 500 mA
= 500 mA
= 0 mA
IN
– V
= 12 V
13 → 18 V; C
18 → 13 V; C
LNB
, no tone signal,
LNB
Test Conditions
LNB
LNB
LNB
BOOST
= 33 V , BOOST capacitor
LNB
TCAP
LOAD
= 22.8 V
target level,
= 5.6 nF,
= 100 μF,
1
LOAD
IN
= 12 V
= 0
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
–12.5
20.16
Min.
–4.5
40.0
7.05
7.40
22.0
320
600
800
3.0
7.5
1.0
77
82
–
–
–
–
–
–
–
–
–
–
–
21.00
Typ.
12.5
7.35
7.70
22.8
1.75
300
352
800
–10
500
900
350
165
3.8
10
30
48
20
85
90
–
–
–
1
5
21.84
1000
1000
Max.
12.0
20.0
–7.5
12.5
56.0
7.65
8.00
23.5
600
384
4.5
4.8
2.5
93
98
–
–
5
–
–
–
–
–
mV
Units
kHz
mΩ
mV
mV
mA
mA
mA
mA
mA
μA
μA
ms
ms
μs
°C
°C
%
%
%
%
A
V
V
V
V
PP
4