SC1182(1998) 查看數據表（PDF） - Semtech Corporation
零件编号
产品描述 (功能)
比赛名单
SC1182
(Rev.:1998)
(Rev.:1998)
Semtech Corporation
SC1182 Datasheet PDF : 12 Pages
| |||
August 25, 1998
MATERIALS LIST
PROGRAMMABLE SYNCHRONOUS DC/DC
CONVERTER, DUAL LOW DROPOUT
REGULATOR CONTROLLER
SC1182/3
Qty. Reference Part/Description Vendor
4 C1,C5,C13, 0.1µF Ceramic
C18
6 C2,C3,C14- 1500µF/6.3V
C17
6 C9-C12,
330µF/6.3V
C21, C22
1 L1
4µH
Various
SANYO
Various
4 Q1,Q2,Q3, See notes
Q4
See notes
1 R4
5mΩ
IRC
1 R5
2.32kΩ, 1%, 1/8W Various
1 R6
1kΩ, 1%, 1/8W
Various
1 R1
1 R12
10Ω, 5%, 1/8W
1%, 1/8W
Various
Various
1 R13
1%, 1/8W
Various
1 R14
1%, 1/8W
Various
1 R15
1%, 1/8W
Various
2 R17, R18 100K, 5%, 1/8W Various
1 U1
SC1182/3CSW SEMTECH
Notes
MV-GX or equiv. Low ESR
8 Turns 16AWG on MICROMETALS T50-52D core
FET selection requires trade-off between efficiency and
cost. Absolute maximum RDS(ON) = 22 mΩ for Q1,Q2
OAR-1 Series
See Table Below (Not required for SC1182)
See Table Below (Not required for SC1182)
See Table Below (Not required for SC1182)
See Table Below (Not required for SC1182)
SETTING LDO OUTPUT VOLTAGE
VOUT LDO1 (LDO2)
3.45V
3.30V
3.10V
2.90V
2.80V
2.50V
1.50V
RB
R12 (R14)
105Ω
105Ω
102Ω
100Ω
100Ω
100Ω
100Ω
RA
R13 (R15)
182Ω
169Ω
147Ω
130Ω
121Ω
97.6Ω
18.7Ω
© 1998 SEMTECH CORP.
VOUT
=
1.265 ⋅ (RA
RB
+ RB )
+ (IFB
⋅RA )
Where :
IFB = Feedback pin bias current
RA = Top feedback resistor
RB = Bottom feedback resistor
See layout diagram for clarification
RA and RB must be low enough so
that the (IFB ⋅ RA ) term does not cause
significant error
6
652 MITCHELL ROAD NEWBURY PARK CA 91320
Share Link: