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PDF RC1587 Data sheet ( Hoja de datos )
| Número de pieza | RC1587 | |
| Descripción | Power Conversion for the Data Communications Market | |
| Fabricantes | Fairchild Semiconductor | |
| Logotipo |  |
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m www.fairchildsemi.com
R3ACAa1tda5jSu8hse7teatb4Ule.c/Foixed Low Dropout Linear RegulatorFeatures
.D• Fast transient response
• Low dropout voltage at up to 3A
w• Load regulation: 0.05% typical
w• Trimmed current limit
w • On-chip thermal limiting
m• Standard TO-220, TO-263, TO-263 center cut,
and TO-252 packages
.coApplications
• Pentium® Class GTL+ bus supply
• Low voltage logic supply
U• Post regulator for switching supply
Sheet4Typical Applications
Description
The RC1587, RC1587-1.5, and RC1587-3.3 are low dropout
three-terminal regulators with 3A output current capability.
These devices have been optimized for low voltage applica-
tions including VTT bus termination, where transient response
and minimum input voltage are critical. The RC1587 is ideal
for low voltage microprocessor applications requiring a reg-
ulated output from 1.5V to 3.6V with an input supply of 5V
or less. The RC1587-1.5 offers fixed 1.5V with 3A current
capability for GTL+ bus VTT termination. The RC1587-3.3
offers fixed 3.3V current capability for logic IC operation.
Current limit is trimmed to ensure specified output current and
controlled short-circuit current. On-chip thermal limiting pro-
vides protection against any combination of overload and
ambient temperature that would create excessive junction
temperatures.
The RC1587, RC1587-1.5, and RC1587-3.3 are available in
the industry-standard TO-220, TO-263, TO-263 center cut,
and TO-252 (DPAK) power packages.
taVIN = 3.3V
a10µF
+
RC1587
VIN VOUT
ADJ
124Ω
1.5V at 3A
+
22µF
.D 24.9Ω
wwVIN = 3.3V
w m10µF
+
RC1587-1.5
VIN VOUT
GND
1.5V at 3A
+
22µF
et4U.coVIN = 5V
taShe10µF
+
RC1587-3.3
VIN VOUT
GND
3.3V at 3A
+
22µF
65-1587-16
www.DaPentium is a registered trademark of Intel Corporation.
REV. 1.5 1/12/01
1 page  
PRODUCT SPECIFICATION
RC1587
Typical Performance Characteristics (continued)
5.0
4.5
4.0
3.5
3.0
-75 -50 -25 0 25 50 75 100 125 150 175
JUNCTION TEMPERATURE (°C)
Figure 7. Short-Circuit Current vs. Temperature
90
80
70
60
50
40
30
20 (VIN – VOUT) ≤ 3V
0.5V ≤ VRIPPLE ≤ 2V
10 IOUT = 3A
0
10 100
1K
10K 100K
FREQUENCY (Hz)
Figure 8. Ripple Rejection vs. Frequency
20
15
10
5
0
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
Figure 9. Maximum Power Dissipation
REV. 1.5
5
5 Page 
PRODUCT SPECIFICATION
RC1587
Mechanical Dimensions (continued)
3-Lead TO-263 Center Cut Package
Symbol
A
b
b2
c2
D
E
e
L
L1
L2
L3
R
α
Inches
Min. Max.
.160 .190
.020 .036
.049 .051
.045 .055
.340 .380
.380 .405
.100 BSC
.575 .625
.090 .110
— .055
.050 .070
.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
1.27 1.78
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
L3
b
e
A
-C-
c2
R (2 PLCS)
L1
-B- -A-
REV. 1.5
11
11 Page | ||
| Páginas | Total 14 Páginas | |
| PDF Descargar | [ Datasheet RC1587.PDF ] | |
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