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PDF ( 数据手册 , 数据表 ) RC1117M

零件编号 RC1117M
描述 1A Adjustable/Fixed Low Dropout Linear Regulator
制造商 Fairchild Semiconductor
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RC1117M 数据手册, 描述, 功能
www.fairchildsemi.com
RC1117
1A Adjustable/Fixed Low Dropout Linear Regulator
Features
• Low dropout voltage
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard SOT-223, TO-263, and TO-252 packages
• Three-terminal adjustable or fixed 2.5V, 2.85V, 3.3V, 5V
Applications
• Active SCSI terminators
• High efficiency linear regulators
• Post regulators for switching supplies
• Battery chargers
• 5V to 3.3V linear regulators
• Motherboard clock supplies
Description
The RC1117 and RC1117-2.5, -2.85, -3.3 and -5 are low
dropout three-terminal regulators with 1A output current
capability. These devices have been optimized for low voltage
where transient response and minimum input voltage are
critical. The 2.85V version is designed specifically to be
used in Active Terminators for SCSI bus.
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal limiting
provides protection against any combination of overload and
ambient temperatures that would create excessive junction
temperatures.
Unlike PNP type regulators where up to 10% of the output
current is wasted as quiescent current, the quiescent current
of the RC1117 flows into the load, increasing efficiency.
The RC1117 series regulators are available in the industry-
standard SOT-223, TO-263 (D2PAK), and TO-252 (DPAK)
power packages.
Typical Applications
VIN = 3.3V
10µF
+
RC1117
VIN VOUT
ADJ
R1
124
+ 1.5V at 1A
22µF
VOUT = VREF(1 + R2/R1) + IAdj • R2
VIN = 5V
10µF
+
RC1117-2.85
VIN VOUT
GND
R2
24.9
+ 2.85V at 1A
22µF
REV. 1.3.1 11/18/02







RC1117M pdf, 数据表
PRODUCT SPECIFICATION
RC1117
Mechanical Dimensions
3-Lead TO-263 Package
Symbol
A
b
b2
c2
D
E
e
L
L1
L2
R
α
Inches
Min. Max.
.160 .190
.020 .036
.049 .051
.045 .055
.340 .380
.380 .405
.100 BSC
.575 .625
.090 .110
.055
.017 .019
0° 8°
Millimeters
Min. Max.
4.06 4.83
0.51 0.91
1.25 1.30
1.14 1.40
8.64 9.65
9.65 10.29
2.54 BSC
14.61 15.88
2.29 2.79
1.40
0.43 0.78
0° 8°
Notes
Notes:
1. Dimensions are exclusive of mold flash and metal burrs.
2. Standoff-height is measured from lead tip with ref. to Datum -B-.
3. Foot length is measured with ref. to Datum -A- with lead surface
(at inner R).
4. Dimensiuon exclusive of dambar protrusion or intrusion.
5. Formed leads to be planar with respect to one another at seating
place -C-.
E
@PKG/
@HEATSINK
L2
D
L
E-PIN
b2
b
e
A
-C-
c2
R (2 PLCS)
L1
-B- -A-
8 REV. 1.3.1 11/18/02














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