RC1587M Fairchild Semiconductor, RC1587M Datasheet

IC REG LDO ADJ 3A TO-263

RC1587M

Manufacturer Part Number
RC1587M
Description
IC REG LDO ADJ 3A TO-263
Manufacturer
Fairchild Semiconductor
Datasheet

Specifications of RC1587M

Applications
Converter, Pentium® II GTL+, Pro
Voltage - Input
4.5 ~ 7 V
Number Of Outputs
1
Voltage - Output
1.5 ~ 3.6 V
Operating Temperature
0°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
D²Pak, TO-263 (3 leads + tab)
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

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Manufacturer
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Price
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Features
• Fast transient response
• Low dropout voltage at up to 3A
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard TO-220, TO-263, 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.
RC1587
3A Adjustable/Fixed Low Dropout Linear Regulator
and TO-252 packages
®
Class GTL+ bus supply
V
V
IN = 3.3V
IN = 3.3V
V
IN = 5V
10 F
10 F
10 F
+
+
+
V
V
V
IN
IN
IN
RC1587-1.5
RC1587-3.3
RC1587
ADJ
GND
GND
V
V
V
OUT
OUT
OUT
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 V
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 V
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.
124
24.9
+
+
22 F
22 F
1.5V at 3A
3.3V at 3A
+
TT
22 F
bus termination, where transient response
65-1587-16
1.5V at 3A
TT
www.fairchildsemi.com
termination. The RC1587-3.3
REV. 1.5 1/12/01

Related parts for RC1587M

RC1587M Summary of contents

Page 1

RC1587 3A Adjustable/Fixed Low Dropout Linear Regulator Features • Fast transient response • Low dropout voltage • Load regulation: 0.05% typical • Trimmed current limit • On-chip thermal limiting • Standard TO-220, TO-263, TO-263 center cut, ...

Page 2

... Pin Assignments RC1587M-1.5, 3.3 RC1587M FRONT VIEW FRONT VIEW GND OUT IN ADJ OUT IN 3-Lead Plastic TO-263 = 3 C/W* JC RC1587MC-1.5, 3.3 RC1587MC FRONT VIEW FRONT VIEW GND IN ADJ IN 3-Lead Plastic TO-263 Center Cut = 3 C/ can vary from 20 C/W to >40 C/W with various mounting techniques. ...

Page 3

PRODUCT SPECIFICATION Electrical Characteristics Tj = 25°C unless otherwise specified. The denotes specifications which apply over the specified operating temperature range. Parameter Conditions 3 Reference Voltage 1.5V 10mA 4 Output Voltage 3.3V 10mA 5 Output Voltage 5.1V 10mA 1, 2 ...

Page 4

RC1587 Typical Performance Characteristics 1.5 1.4 1.3 1.2 1.1 1.0 T=0 C 0.9 T=125 C T=25 C 0.8 0.7 0.6 0.5 0 0.5 1 1.5 OUTPUT CURRENT (A) Figure 1. Dropout Voltage vs. Output Current 1.275 1.270 1.265 1.260 1.255 ...

Page 5

PRODUCT SPECIFICATION Typical Performance Characteristics 5.0 4.5 4.0 3.5 3.0 -75 -50 - 100 125 150 175 JUNCTION TEMPERATURE ( C) Figure 7. Short-Circuit Current vs. Temperature REV. 1.5 (continued ...

Page 6

RC1587 Applications Information General The RC1587, RC1587-1.5, and RC1587-3.3 are three-terminal regulators optimized for GTL+ V termination applications. TT These devices are short-circuit protected, and offer thermal shutdown to turn off the regulator when the junction temper- ature exceeds about ...

Page 7

PRODUCT SPECIFICATION RC1587 V IN OUT ADJ REF ADJ R2/R1 (R2) OUT REF ADJ Figure 11. Basic Regulator Circuit Load Regulation It is not ...

Page 8

RC1587 Junction-to-case thermal resistance is specified from the IC junction to the bottom of the case directly below the die. This is the lowest resistance path for heat flow. Proper mounting ensures the best thermal flow from this area of ...

Page 9

PRODUCT SPECIFICATION Table 3. Bill of Materials for Application Circuit for the RC1587-1.5 Item Quantity Manufacturer REV. 1.5 U1 RC1587-3 OUT 3. GND Figure ...

Page 10

RC1587 Mechanical Dimensions 3-Lead TO-263 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 L ...

Page 11

PRODUCT SPECIFICATION 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 ...

Page 12

RC1587 Mechanical Dimensions 3-Lead TO-220 Package Inches Millimeters Symbol Min. Max. Min. A .140 .190 3.56 b .015 .040 .38 b1 .045 1.14 .070 c1 .014 .022 .36 øP .139 .161 3.53 D .560 .650 14.22 E .380 .420 9.65 ...

Page 13

PRODUCT SPECIFICATION Mechanical Dimensions 3-Lead TO-252 Package Inches Millimeters Symbol Min. Max. Min. A .086 .094 2.19 b .025 .035 0.64 b2 .030 0.76 .045 c2 .018 .023 0.76 D .210 .231 5.33 E .250 .265 6.35 e .090 BSC ...

Page 14

... RC1587D TO-252 RC1587M-1.5 TO-263 RC1587MC-1.5 TO-263 center cut RC1587T-1.5 TO-220 RC1587D-1.5 TO-252 RC1587M-3.3 TO-263 RC1587MC-3.3 TO-263 center cut RC1587T-3.3 TO-220 RC1587D-3.3 TO-252 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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