FAN1084 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

  • Fast transient response
  • Low dropout voltage at up to 4.5A
  • Load regulation: 0.5% typical
  • On-chip thermal limiting
  • Standard TO-220, TO-263 center cut, and TO-252 packages

Applications

  • Desktop PCs, RISC and embedded processors’ supply
  • GTL, SSTL logic Reference bus supply
  • Low voltage V CC logic supply
  • Battery-powered circuitry
  • Post regulator for switching supply
  • Cable and ADSL modems’ DSP core supply
  • Set Top Boxes and Web Boxes modules’ supply

Description

The FAN1084, FAN1084-1.5, and FAN1084-3.3 are low dropout three-terminal regulators with 4.5A output current capability. These devices have been optimized for low voltage applications including V TT bus termination, where transient response and minimum input voltage are critical. The FAN1084 is ideal for low voltage microprocessor applica- tions requiring a regulated output from 1.5V to 3.6A with an input supply of 5V or less. The FAN1084-1.5 offers fixed 1.5V with 4.5A current capabilities for GTL+ bus V TT termination. The FAN1084-3.3 offers a fixed 3.3V output at 4.5A. On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create excessive junction temperatures. The FAN1084 series regulators are available in the industry- standard TO-220, TO-263 center cut, and TO-252 (DPAK) power packages. Application Diagrams 10µF 22µF124Ω 124Ω VIN = 5V 2.5V at 4.5A + + VIN ADJ VOUT FAN1084 10µF 22µF VIN = 3.3V 1.5V at 4.5A + + VIN GND VOUT FAN1084-1.5 FAN1084 4.5A Adjustable/Fixed Low Dropout Linear Regulator

FAN1084 PRODUCT SPECIFICATION 2 REV. 1.0.8 11/10/03 Pin Assignments Absolute Maximum Ratings Parameter Min. Max. Unit VIN 7V Operating Junction Temperature Range 0 125 °C Storage Temperature Range –65 150 °C Lead Temperature (Soldering, 10 seconds) 300 °C GND OUT FRONT VIEW 3-Lead Plastic TO-220 Θ JC=3°C/W* 3-Lead Plastic TO-263 Θ JC=3°C/W* *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, Θ JA can vary from 30°C/W to more than 40°C/W. Other mounting techniques may provide better power dissipation than 30°C/W. †FAN1084M-3.3 also available with uncut center lead. FAN1084M-3.3 † FAN1084M-1.5 IN 123 ADJ OUT FRONT VIEW IN 123 GND FRONT VIEW IN 123 FAN1084M FAN1084T FAN1084T-3.3 FAN1084T-1.5 ADJ FRONT VIEW IN 123 3-Lead Plastic TO-252 Θ JC=3°C/W* FAN1084D-3.3 FAN1084D-1.5 GND FRONT VIEW IN 123 FAN1084D ADJ FRONT VIEW IN 123 Tab is out. Tab is out.

PRODUCT SPECIFICATION FAN1084 REV. 1.0.8 11/10/03 3

Electrical Characteristics

Operating Conditions: 4.75 ≤ VIN < 5.25V, Tj = 25°C unless otherwise specified. Notes: 1. See thermal regulation specifications for changes in output voltage due to heating effects. Load and line regulation are measured at a constant junction temperature by low duty cycle pulse testing. 2. Line and load regulation are guaranteed up to the maximum power dissipation. 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. FAN1084 only. 4. Guaranteed by design. 5. FAN1084-1.5 only. 6. FAN1084-3.3 only. Parameter Conditions Min. Typ. Max Units Reference Voltage3 Adj connected to ground, IOUT = 10mA 1.23 1.250 1.27 V Output Voltage5 IOUT = 10mA 1.475 1.5 1.525 V Output Voltage6 IOUT = 10mA 3.234 3.3 3.366 V Line Regulation1, 2 IOUT = 10mA 0.5 2 % Load Regulation1, 2 10mA ≤ IOUT ≤ 4.5A 0.5 2.5 % Dropout Voltage ∆VREF% = 2%, IOUT = 4.5A 1.5 V Current Limit (V IN – VOUT ) = 2V 5.5 A Adjust Pin Current3 35 100 µ Α Mimimum Load Current4 1.5V ≤ (VIN – VOUT ) ≤ 5.75V 10 mA Quiescent Current4 VIN = 5V 4 mA Thermal Resistance, Junction to Case TO-220 3 °C/W TO-263 Center Cut, TO-252 3 °C/W Thermal Shutdown4 150 °C Typical Performance Characteristics Figure 1. Maximum Power Dissipation

optimizes the frequency response with low ESR capacitors. the FAN1084 for low ripple and fast transient response. graph of stability of output capacitance ESR vs load current. generate current large enough to do any damage. down and none of the protection circuitry is then functional. Figure 2. Optional Protection 100Ω to 120Ω ) in the feedback divider network in Figure 2. minimum load current of 10mA.

PRODUCT SPECIFICATION FAN1084 REV. 1.0.8 11/10/03 9 Mechanical Dimensions 3-Lead TO-263 Center Cut Package A .160 .190 4.06 4.83 Symbol Inches Min. Max. Min. Max. Millimeters Notes b .020 .036 0.51 0.91 b2 .049 .051 1.25 1.30 c2 .045 .055 1.14 1.40 D .340 .380 8.64 9.65 .380 .405 9.65 10.29 .100 BSC E e L .575 .625 14.61 15.88 .090 .110 2.29 2.79 .050 .070 1.27 1.78 α — .055 — 1.40 .017 .019 0.43 0.78R 0° 8° 0° 8° 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-.

2.54 BSC

E @PKG/ @HEATSINK D A -C- L R (2 PLCS) -A--B- E-PIN b e

FAN1084 PRODUCT SPECIFICATION 10 REV. 1.0.8 11/10/03 Mechanical Dimensions 3-Lead TO-263 Package A .160 .190 4.06 4.83 Symbol Inches Min. Max. Min. Max. Millimeters Notes b .020 .036 0.51 0.91 b2 .049 .051 1.25 1.30 c2 .045 .055 1.14 1.40 D .340 .380 8.64 9.65 .380 .405 9.65 10.29 .100 BSC E e L .575 .625 14.61 15.88 .090 .110 2.29 2.79 α L2 — .055 — 1.40 .017 .019 0.43 0.78R 0° 8° 0° 8° 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 D A -C- L R (2 PLCS) -A--B- E-PIN b e

PRODUCT SPECIFICATION FAN1084 REV. 1.0.8 11/10/03 11 Mechanical Dimensions (continued) 3-Lead TO-220 Package A .140 .190 3.56 4.83 Symbol Inches Min. Max. Min. Max. Millimeters Notes b .015 .040 .38 1.02 .070 1.78b1 .045 1.14 c1 .014 .022 .36 .56 øP .139 .161 3.53 4.09 D .560 .650 14.22 16.51 .380 .420 9.65 10.67 .090 .110 2.29 2.79 E e e1 .190 .210 4.83 5.33 .045 — 1.14 — .020 .055 .51 1.40 α F H1 .230 .270 5.94 6.87 .080 .115 2.04 2.92 .500 .580 12.70 14.73 L 6.35 BSC.250 BSCL1 .100 .135 2.54 3.43 3° 7° 3° 7° Q b L Q E e E-PIN øP D F A (5X)α Notes: 1. Dimension c1 apply for lead finish.

FAN1084 PRODUCT SPECIFICATION 12 REV. 1.0.8 11/10/03 Mechanical Dimensions (continued) 3-Lead TO-252 Package D GAGE PLANE NOTES: UNLESS OTHERWISE SPECIFIED A) ALL DIMENSIONS ARE IN MILLIMETERS. B) THIS PACKAGE CONFORMS TO JEDEC, TO-252, ISSUE C. VARIATION AA & AB, DATED NOV. 1999. C) DIMENSIONING AND TOLERANCING PER ASME Y14.5 –1994. D) HEAT SINK TOP EDGE COULD BE IN CHAMFERED CORNERS OR EDGE PROTRUSION. E) DIMENSIONS L3, D, E1 & D1 TABLE: OPTION AA OPTION AB 4.32 MIN 3.81 MIN

5.21 MIN

D D1 4.57 MIN 0.51 SEATING PLANE DETAIL A (1.54) 1.78 1.40 0.61 0.48 10°

0.127 MAX

(ROTATED –90° SCALE 12X 1 1 6.73 6.35 1.02 0.84 6.25

6.00 MIN

6.50 MIN

4.80 2.38 2.18 0.58 0.48 0.10 B 10.41 9.40SEE DETAIL A

3.00 MIN

1.40 MIN

LAND PATTERN RECOMMENDATION 1.14 0.78 0.89 0.54 SEE NOTE D (0.59) 2.29 5.46 5.21

4.570.25 A CMM

2.90 2.30 C A B

FAN1084 PRODUCT SPECIFICATION 11/10/03 0.0m 003 Stock#DS30001084  2001 Fairchild Semiconductor Corporation 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. As used herein: 1. Life support devices or systems are devices or systems which, (a) are intended for surgical implant into the body, or (b) support or sustain life, and (c) whose failure to perform when properly used in accordance with instructions for use provided in the labeling, can be reasonably expected to result in a significant injury of the user. 2. A critical component in any component of a life support device or system whose failure to perform can be reasonably expected to cause the failure of the life support device or system, or to affect its safety or effectiveness. www.fairchildsemi.com 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.

Ordering Information

FAN1084MC TO-263 Center Cut FAN1084T TO-220 FAN1084D TO-252 FAN1084MC15 TO-263 Center Cut FAN1084T15 TO-220 FAN1084D15 TO-252 FAN1084MC33 TO-263 Center Cut FAN1084M33 TO-263 FAN1084T33 TO-220 FAN1084D33 TO-252