rc1585t-1.5 Fairchild Semiconductor, rc1585t-1.5 Datasheet

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rc1585t-1.5

Manufacturer Part Number
rc1585t-1.5
Description
5a Adjustable/fixed Low Dropout Linear Regulator
Manufacturer
Fairchild Semiconductor
Datasheet
Features
• Fast transient response
• Low dropout voltage at up to 5A
• Load regulation: 0.05% typical
• Trimmed current limit
• On-chip thermal limiting
• Standard TO-220, TO-263, TO-263 center cut and TO-252
Applications
• Pentium
• Low voltage logic supply
• Post regulator for switching supply
Typical Applications
Pentium is a registered trademark of Intel Corporation.
RC1585
5A Adjustable/Fixed Low Dropout Linear Regulator
packages
®
class GTL+ bus supply
V
V
IN = 3.3V
IN = 3.3V
10µF
10µF
+
+
V
V
IN
IN
RC1585-1.5
RC1585
ADJ
GND
V
V
OUT
OUT
Description
The RC1585 and RC1585-1.5 are low dropout three-terminal
regulators with 5A output current capability. These devices
have been optimized for low voltage applications including
V
mum input voltage are critical. The RC1585 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 RC1585-1.5 offers fixed 1.5V with 5A current capabili-
ties for GTL+ bus V
Current limit is trimmed to ensure specified output current
and controlled short-circuit current. On-chip thermal limit-
ing provides protection against any combination of overload
and ambient temperature that would create excessive junc-
tion temperatures.
The RC1585 series regulators are available in the industry-
standard TO-220, TO-263, TO-263 center cut and TO-252
power packages.
TT
bus termination, where transient response and mini-
124Ω
24.9Ω
+
22µF
1.5V at 5A
+
22µF
65-1585-01a
TT
1.5V at 5A
termination.
www.fairchildsemi.com
REV. 1.1.4 10/8/02

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rc1585t-1.5 Summary of contents

Page 1

RC1585 5A 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

... Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) 2 RC1585T FRONT VIEW 1 ADJ RC1585D-1.5 FRONT VIEW Tab is Out. 1 GND Min. 0 -65 PRODUCT SPECIFICATION RC1585T-1.5 FRONT VIEW OUT IN GND OUT IN 3-Lead Plastic TO-220 = 3°C/W θ JC RC1585D FRONT VIEW Tab is Out ...

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 ≤ (V 10mA ≤ Output Voltage 3V ≤ V 10mA ...

Page 4

RC1585 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 OUTPUT CURRENT (A) Figure 1. Dropout Voltage vs. Output Current 1.275 1.270 1.265 1.260 1.255 1.250 1.245 1.240 ...

Page 5

PRODUCT SPECIFICATION Typical Performance Characteristics 8.0 7.0 6.0 5.0 4.0 -75 -50 - 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 7. Short-Circuit Current vs. Temperature REV. 1.1.4 10/8/02 (continued ...

Page 6

RC1585 Applications Information General The RC1585 and RC1585-1.5 are three-terminal regulators optimized for GTL+ V termination and logic applica- TT tions. These devices are short-circuit protected and offer thermal shutdown to turn off the regulator when the junction temperature exceeds ...

Page 7

... Thermal resistance specifications have been developed to more accurately reflect device tempera- ture and ensure safe operating temperatures For example, look at using an RC1585T to generate 5A @ 1.5V ± 2% from a 3.3V source (3.2V to 3.6V). Assumptions: 65-1585-14 • 3.6V worst case IN • ...

Page 8

... OUT + + GND C1 C3 10µF 100µF Figure 15. Application Circuit (RC1585-1.5) Part Number Xicon L10V10 Xicon L10V100 Fairchild RC1585T-1.5 PRODUCT SPECIFICATION V OUT 1. 100µF 65-1586-16 Description 10µF, 10V Aluminum 100µF, 10V Aluminum 124Ω, 1% 24.9Ω Regulator V OUT 1.5V 65-1585-17 Description 10µ ...

Page 9

PRODUCT SPECIFICATION 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 ...

Page 10

RC1585 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 ...

Page 11

PRODUCT SPECIFICATION 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 ...

Page 12

RC1585 Mechanical Dimensions 3-Lead TO-252 Package 6.73 6.35 5.46 5. (0.59) 0.89 0. SEE NOTE GAGE PLANE 0.61 0.48 10° 0° 1.78 1.40 2.90 DETAIL A (ROTATED ...

Page 13

... TO-220 RC1585D TO-252 RC1585M-1.5 TO-263 RC1585MC-1.5 TO-263 Center Cut RC1585T-1.5 TO-220 RC1585D-1.5 TO-252 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS ...

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