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Número de pieza | FAN1589 | |
Descripción | 2.7A/ 1.2V Low Dropout Linear Regulator for VRM8.5 | |
Fabricantes | Fairchild Semiconductor | |
Logotipo | ||
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FAN1589
2.7A, 1.2V Low Dropout Linear Regulator for VRM8.5
Features
• Fast transient response
• Low dropout voltage at up to 2.7A
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard TO-220, TO-263, TO-263 center cut and
TO-252 (DPAK) packages
Applications
• A GTL+ bus supply for VRM 8.5
• Low voltage logic supply
• Post regulator for switching supply
Description
The FAN1589 is a low dropout three-terminal regulator with
2.7A output current capability. This device has been optimized
for VTT bus termination, where transient response and mini-
mum input voltage are critical. The FAN1589 offers fixed
1.2V with 2.7A current capability for a GTL+ bus VTT
termination.
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 FAN1589 is available in the industry-standard TO-220,
TO-263, TO-263 center cut and TO-252 (DPAK) power
packages.
Typical Application
VIN = 3.3V
10µF
+
FAN1589
VIN VOUT
GND
1.2V at 2.7A
+
22µF
REV. 1.0.3 2/25/02
1 page PRODUCT SPECIFICATION
Typical Performance Characteristics (continued)
FAN1589
90
80
70
60
50
40
30
20 (VIN – VOUT) ≤ 3V
0.5V ≤ VRIPPLE ≤ 2V
10 IOUT = 2.7A
0
10 100 1K
10K 100K
FREQUENCY (Hz)
Figure 7. Ripple Rejection vs. Frequency
20
15
10
5
0
50 60 70 80 90 100 110 120 130 140 150
CASE TEMPERATURE (°C)
Figure 8. Maximum Power Dissipation
REV. 1.0.3 2/25/02
5
5 Page PRODUCT SPECIFICATION
Mechanical Dimensions (continued)
3-Lead TO-252 Package
Symbol
A
b
b2
b3
c
c2
D
E
e
H
L
L1
L3
L4
Inches
Min. Max.
.086 .094
.025 .035
.030
.205
.018
.018
.045
.215
.024
.023
.210 .245
.250 .265
.090 BSC
.370 .410
.055 .070
.108 REF
.035 .080
.025 .040
Millimeters
Min. Max.
2.19 2.39
0.64 0.89
0.76
5.21
0.46
0.46
1.14
5.46
0.61
0.58
5.33 6.22
6.35 6.73
2.29 BSC
9.40 10.41
1.40 1.78
2.74 REF
0.89 2.03
0.64 1.02
Notes
4
1
1
3
4
FAN1589
Notes:
1. Dimensions are exclusive of mold flash, metal burrs or interlead
protrusion.
2. Stand off-height is measured from lead tip with ref. to Datum -B-.
3. Foot length is measured with ref. to Datum -A- with lead surface.
4. Thermal pad contour optional within dimension b3 and L3.
5. Formed leads to be planar with respect to one another at seating
place -C-.
6. Dimensions and tolerances per ASME Y14.5M-1994.
E
@PKG/
@HEATSINK
b3
L3
c2
D
H
E-PIN
b2 L4
b
e
A
-C-
L1
L
α = 0° – 10°
-B- -A-
REV. 1.0.3 2/25/02
11
11 Page |
Páginas | Total 12 Páginas | |
PDF Descargar | [ Datasheet FAN1589.PDF ] |
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