rc1584 Fairchild Semiconductor, rc1584 Datasheet

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rc1584

Manufacturer Part Number
rc1584
Description
7a Adjustable/fixed Low Dropout Linear Regulator
Manufacturer
Fairchild Semiconductor
Datasheet
Features
• Fast transient response
• Low dropout voltage at up to 7A
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard TO-220, TO-263 and TO-263 center cut
Applications
• Pentium
• Low voltage logic supply
• Post regulator for switching supply
Typical Applications
Pentium is a registered trademark of Intel Corporation.
RC1584
7A Adjustable/Fixed Low Dropout Linear Regulator
packages
®
Class GTL+ bus supply
V
V
IN = 3.3V
IN = 3.3V
10 F
10 F
+
+
V
V
IN
IN
RC1584-1.5
RC1584
ADJ
GND
V
V
OUT
OUT
Description
The RC1584 and RC1584-1.5 are low dropout three-terminal
regulators with 7A output current capability. These devices
have been optimized for low voltage applications including
V
input voltage are critical. The RC1584 is ideal for low
voltage microprocessor applications requiring a regulated
output from 1.5V to 3.6V with an input supply of 5V or less.
The RC1584-1.5 offers fixed 1.5V with 7A current capabil-
ity for GTL+ bus V
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 temperature that would create excessive junction
temperatures.
The RC1584 and RC1584-1.5 are available in the industry-
standard TO-220, TO-263 and TO-263 center cut power
packages.
TT
bus termination, where transient response and minimum
124
24.9
+
22 F
1.5V at 7A
+
22 F
TT
65-1584-16
1.5V at 7A
termination.
www.fairchildsemi.com
REV. 1.0.5 7/13/00

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rc1584 Summary of contents

Page 1

... V bus termination, where transient response and minimum TT input voltage are critical. The RC1584 is ideal for low voltage microprocessor applications requiring a regulated output from 1.5V to 3.6V with an input supply less. The RC1584-1.5 offers fixed 1.5V with 7A current capabil- ity for GTL+ bus V Current limit is trimmed to ensure specifi ...

Page 2

... RC1584MC FRONT VIEW FRONT VIEW GND IN ADJ IN 3-Lead Plastic TO-263 Center Cut = 3 C/W* JC Min. 0 -65 PRODUCT SPECIFICATION RC1584T RC1584T-1.5 FRONT VIEW FRONT VIEW ADJ OUT IN GND OUT IN 3-Lead Plastic TO-220 = 3 C/W JC Tab is Out. 65-1584-02 Max. ...

Page 3

... Line and load regulation are guaranteed up to the maximum power dissipation (18W). Power dissipation is determined by input/output differential and the output currrent. Guaranteed maximum output power will not be available over the full input/ output voltage range. 3. RC1584 only. 4. RC1584-1.5 only. REV. 1.0.5 7/13/00 (V – ...

Page 4

... Figure 6. Adjust Pin Current vs. Temperature PRODUCT SPECIFICATION 100 125 150 175 JUNCTION TEMPERATURE ( C) SET WITH 1% RESISTORS 3.6V OUT Note: 1. RC1584 Only 100 125 150 175 JUNCTION TEMPERATURE ( C) Note: 1. RC1584 Only 100 125 150 175 JUNCTION TEMPERATURE ( C) REV. 1.0.5 7/13/00 ...

Page 5

... Figure 7. Short-Circuit Current vs. Temperature REV. 1.0.5 7/13/00 (continued – 0. OUT 0 10 Figure 8. Ripple Rejection vs. Frequency 100 110 120 130 140 150 CASE TEMPERATURE ( C) Figure 9. Maximum Power Dissipation RC1584 ) 3V OUT V 2V RIPPLE = 7A 100 1K 10K 100K FREQUENCY (Hz) 5 ...

Page 6

... ESR of < also recommended to use bypass capacitors such as a 22µF tantalum or a 100µF aluminum on the adjust pin of the RC1584 for low ripple and fast transient response. When these bypassing capacitors are not used at the adjust pin, larger values of output capacitors provide equally good results ...

Page 7

... R P heat sink resistance. Thermal resistance specifications have been developed to more accurately reflect device tempera- ture and ensure safe operating temperatures For example, look at using an RC1584T to generate 7A @ 1.5V 2% from a 3.3V source (3.135V to 3.465V). Assumptions: 65-1584-17 • 3.465V worst case IN • ...

Page 8

... Proper mounting ensures the best thermal flow from this area of the package to the heat sink. Use of a thermally conductive material at the Table 1. Bill of Materials for Application Circuit for the RC1584 Item Quantity Manufacturer C1 1 C2, C3 ...

Page 9

... Standoff-height is measured from lead tip with ref. to Datum -B-. Max. 3. Foot length is measured with ref. to Datum -A- with lead surface 4.83 (at inner R). 0.91 4. Dimensiuon exclusive of dambar protrusion or intrusion. 5. Formed leads to be planar with respect to one another at seating 1.30 place -C-. 1.40 9.65 10.29 2.54 BSC 15.88 2.79 1.40 0. E-PIN R (2 PLCS - -B- -A- RC1584 9 ...

Page 10

... RC1584 Mechanical Dimensions 3-Lead TO-263 Center Cut Package Inches Millimeters Symbol Min. Max. Min. A .160 .190 4.06 b .020 .036 0.51 b2 .049 .051 1.25 c2 .045 .055 1.14 D .340 .380 8.64 E .380 .405 9.65 e .100 BSC 2.54 BSC L .575 .625 14.61 L1 .090 .110 2.29 L2 — .055 — L3 .050 .070 1.27 R .017 .019 0. ...

Page 11

... F .020 .055 .51 H1 .230 .270 5.94 J1 .080 .115 2.04 L .500 .580 12.70 L1 .250 BSC 6.35 BSC Q .100 .135 2. REV. 1.0.5 7/13/00 (continued) Notes Max. 4.83 1.02 1.78 .56 4.09 16.51 10.67 2.79 5.33 — 1.40 6.87 2.92 14.73 3.43 Notes Dimension c1 apply for lead finish E-PIN øP (5X) D RC1584 ...

Page 12

... TO-263 RC1584MC TO-263 center cut RC1584T TO-220 RC1584M-1.5 TO-263 RC1584MC-1.5 TO-263 center cut RC1584T-1.5 TO-220 LIFE SUPPORT POLICY FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR CORPORATION ...

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