a8291 Allegro MicroSystems, Inc., a8291 Datasheet - Page 17

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

A8291
Table 8. Component Selection Table
*
Either C9 or C12 are used, but not both.
D1, D2, D3, D5
C8, C9
Component
C10, C13
R1 to R6
C1, C4
C2, C5
C11
R10
C3
C7
C6
D4
R7
R8
R9
L1
L2
L3
b
, C12
b
220 nF, 10 V
220 nF, 50 V, X5R or X7R, 0805
100 nF, 50 V, X5R or X7R, 0603
100 μF, 35 V
1.0 μF, 25 V
TVS, 20 V
10 nF, 10 V
10 nF, 50 V, X5R or X7R, 0402 or 0603
0.68 μF, 25 V
Schottky diode, 40 V, 1 A, SOD-123
33 μH, I
220 μH, I
1 μH, 1 A, DCR < 120 mΩ, 1206
Determined by V
15 Ω, 1%,
100 Ω, 1%,
30 Ω,
1 Ω,
Single LNB Supply and Control Voltage Regulator
1
/
1
8
/
8
SAT
W
SAT
W
RM
1
MIN
/
> 1.3 A, DCR < 130 mΩ
MIN
1
8
MIN
MIN
, 32 V
> 0.5 A, DCR < 0.8 Ω
/
MIN
8
W
, X5R or X7R, 0402 or 0603
, X5R or X7R, 1206
W
, X5R or X7R, 0402 or 0603
, ESR < 75 mΩ, I
, X5R or X7R, 0805
DD
CL
, bus capacitance, etc.
Characteristics
at 500 A (8/20 μs), 3000 W
RIPPLE
> 800 mA
ChemiCon: EKZE500ELL101MHB5D
Nichicon: UHC1V101MPT
Panasonic: EEU-FM1H101B
TDK: C2012X5R1E684K
Murata: GRM21BR71E684KA88
Kemet: C0805C684K3PAC
AVX: 08053D684KAT2A
TDK: C3216X7R1E105K
Murata: GRM31MR71E105KA01
Taiyo Yuden: TMK316BJ105KL-T
Kemet: C1206C105K3RACTU
Diodes, Inc: B140HW-7
Central Semi: CMMSH1-40
Littelfuse: SMDJ20A
ST: LNBTVS6-221S
TDK: TSL0808RA-330K1R4-PF
Taiyo Yuden: LHLC08TB330K
Coilcraft: DR0608-333L
TDK: TSL0808RA-221KR54-PF
Taiyo Yuden: LHLC08TB221K
Coilcraft: DR0608-224L
Kemet: LB3218-T1R0MK
Murata: LQM31PN1R0M00L
Taiyo Yuden: LB3218T1R0M
TDK: MLP3216S1R0L
Manufacturer Device
115 Northeast Cutoff, Box 15036
Allegro MicroSystems, Inc.
Worcester, Massachusetts 01615-0036 [phone]
www.allegromicro.com
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