a8291 Allegro MicroSystems, Inc., a8291 Datasheet - Page 2

• Manufacturer Part Number: a8291
• Description: A8291 Single Lnb Supply And Control Voltage Regulator
• Manufacturer: Allegro MicroSystems, Inc.

A8291
Description (continued)
time source. A DiSEqC™ filter bypass switch is also integrated, to
minimize the output impedance during tone generation.
A comprehensive set of fault registers are provided, which comply
with all the common standards, including: overcurrent, thermal
shutdown, undervoltage, cable disconnect, power not good, and
tone detect.
The device uses a 2-wire bidirectional serial interface, compatible
with the I
The A8291 is supplied in a lead (Pb) free 28-lead MLP/QFN.
Selection Guide
Package Thermal Characteristics*
* Additional information is available on the Allegro website.
A8291SETTR-T
a
b
Absolute Maximum Ratings
Load Supply Voltage, VIN pin
Output Current*
Output Voltage; BFI, BFO, LNB, and BOOST pins
Output Voltage; LX pin
Output Voltage, VCP pin
Logic Input Voltage, EXTM and BFC pins
Logic Input Voltage, other pins
Logic Output Voltage
Operating Ambient Temperature
Junction Temperature
Storage Temperature
*Output current rating may be limited by duty cycle, ambient temperature, and heat sinking. Under any set of conditions, do not exceed the
specified current ratings, or a junction temperature, T
Contact Allegro for additional packing options.
Leadframe plating 100% matte tin.
Part Number
Package
ET
2
C™ standard, that operates up to 400 kHz.
Characteristic
b
(°C/W)
R
32
θJA
7 in. reel, 1500 pieces/reel
Single LNB Supply and Control Voltage Regulator
12 mm carrier tape
Packing
a
4-layer
J
Symbol
T
PCB
, of 150°C.
J
(max)
I
T
V
OUT
T
stg
IN
A
ET package, MLP/QFN surface mount
Conditions
0.90 mm nominal height
Description
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
–55 to 150
–0.3 to 5
–0.3 to 7
–0.3 to 7
–20 to 85
Internally
–1 to 33
–1 to 30
–1 to 41
Rating
Limited
150
16
Units
°C
°C
°C
V
A
V
V
V
V
V
V
2