FAN1582 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

  • Ultra Low dropout voltage, 0.4V typical at 3A
  • Remote sense operation
  • Fast transient response
  • Load regulation: 0.05% typical
  • 0.5% initial accuracy
  • On-chip thermal limiting
  • 5-Pin SPAK, TO-252 DPAK, and TO-263 packages

Applications

  • Pentium Processors
  • PowerPC , AMD K5 and K6 processors
  • Pentium support of GTL+ bus supply
  • Low voltage logic supply
  • Embedded Processor supplies
  • Split plane regulator
  • New 2.5V and 1.8V Logic Families

Description

The FAN1582, FAN1582-1.5, and FAN1582-2.5 are ultra-low dropout regulators with 3A 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 FAN1582 is ideal for low voltage microprocessor applications requiring a reg- ulated output from 1.3V to 5.7V with a power input supply 3A current capabilities for GTL+ bus V TT termination. The FAN1582-2.5 offers fixed 2.5V with 3A current capability for logic IC operation and processors while minimizing the overall power dissipation. Current limit ensures controlled short-circuit current. On-chip thermal limiting provides protection against any combination of overload and ambient temperature that would create exces- sive junction temperatures. The FAN1582 series regulators are available in the 5-Pin SPAK, TO-252 DPAK, and TO-263 power packages. Typical Applications 22µF VCNTL = 5V 2.1V at 3A 10µF VIN = 3.3V VIN VSENSE VCNTL Adj VOUT FAN1582 22µF VCNTL = 5V 2.5V at 3A 10µF VIN = 3.3V 1µF VIN VSENSE VCNTL GND VOUT FAN1582–2.5 86.6Ω 124Ω 22µF VCNTL = 12V 5V at 3A 10µF VIN = 5.75V VIN VSENSE VCNTL Adj VOUT FAN1582 374Ω 124Ω FAN1582 3A Adjustable/Fixed Ultra Low Dropout Linear Regulator

FAN1582 PRODUCT SPECIFICATION REV. 1.1.2 2/26/03 Pin Assignments Pin Definitions Internal Block Diagram Pin Number Pin Name Pin Function Descrition VSense Remote Voltage Sense . Connect this pin to the load to permit true remote sensing and avoid trace drops. ADJ/GND Adjust or Ground. On the FAN1582, this pin forms the feedback to determine the output voltage. On the FAN1582-1.5 and -2.5, connect this pin to ground.

3 VOUT

Output Voltage. This pin and the tab are output.

4 VCNTL

Control Voltage. This pin draws small-signal power to control the FAN1582 circuitry. Connect to a voltage higher than VIN, as shown in the applications circuits.

5 VIN

Input Voltage. FRONT VIEW FRONT VIEW 123 4 5 FRONT VIEW 123 4 5 FAN1582M-1.5, -2.5 FAN1582M FAN1582P FRONT VIEW FAN1582P-1.5, -2.5 FRONT VIEW FAN1582D FRONT VIEW FAN1582D-1.5, -2.5 5-Lead Plastic TO-263 ΘJC=3°C/W* Tab is out. 5-Lead Plastic SPAK ΘJC=2°C/W* Tab is out. 5-Lead Plastic TO-252 DPAK ΘJC=3°C/W* Tab is out. 12345 ADJ CNTL OUT S IN GND CNTL OUT S IN ADJ CNTL OUT S IN GND CNTL OUT S IN 12345 1 2 3 4 5 1 2 3 4 5 GND CNTL OUT S IN ADJ CNTL OUT S IN *With package soldered to 0.5 square inch copper area over backside ground plane or internal power plane, θJA can vary from 30 °C/W to more than 40 °C/W. Other mounting techniques can provide a thermal resistance lower than 30 °C/W. Current Limit Thermal Shutdown Vref Vin, Power Output Sense Adj VCNTL, Control Voltage Loop Amplifier

PRODUCT SPECIFICATION FAN1582 REV. 1.1.2 2/26/03 Absolute Maximum Ratings

Electrical Characteristics

T J =25°C, V OUT = V S , V ADJ = 0V unless otherwise specified. The • denotes specifications which apply over the specified operating temperature range. 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 (18W). Power dissipation is determined by input/output differential and the output current. Guaranteed maximum output power will not be available over the full input/ output voltage range. 3. FAN1582 only. 4. FAN1582-1.5 only. 5. FAN1582-2.5 only. Parameter Min. Max. Unit V IN V CNTL 13.2 V Operating Junction Temperature Range 0 125 °C Lead Temperature (Soldering, 10 sec.) 300 °C Storage Temperature Range -65 150 °C Parameter Conditions Min. Typ. Max. Units Reference Voltage V IN = 2.0V, V CNTL = 2.75V, I OUT = 10mA 1.243 1.250 1.257 V Reference Voltage 2.05V V IN 5.5V, 2.7V V CNTL 12V, 10mA I OUT

  • 1.237 1.250 1.263 V Adjustable Output Voltage 3V V IN 7V (function of Vout), 10mA I OUT
  • Vref 1.5 5.7 V Output Voltage V IN 7V, 10mA I OUT 3A • 1.47 1.5 1.53 V Output Voltage 5.1V V IN 7V, 10mA I OUT 3A • 2.474 2.5 2.526 V Line Regulation 1,2 1.75V V IN 5.5V, 2.5V V CNTL 12V, I OUT = 10mA
  • 1 3 m V Load Regulation 1,2 V IN = 2.1V, V CNTL = 2.75V, 10mA I OUT
  • 1 5 m V Dropout Voltage Minimum CNTL OUT V IN = 2.05V, V REF = 1%, I OUT = 3A • 1.05 1.18 V Dropout Voltage Minimum IN OUT V CNTL = 2.75V, V REF = 1%, I OUT = 3A 0.4 0.5 V Dropout Voltage Minimum V IN V CNTL = 2.75V, V REF = 1%, I OUT = 3A
  • 0.5 0.6 V Current Limit V IN = 2.05V, V CNTL = 2.75V • 3.1 A Control Pin Current V IN = 2.05V, V CNTL = 2.75V, I OUT = 10mA
  • 2 6 m A Adjust Pin Current V IN = 2.05V, V CNTL = 2.75V • 50 120 µA Minimum Load Current V IN = 3.3V, V CNTL = 5V • 5.0 10 mA Ripple Rejection V IN = 3.75V, V CNTL C OUT = 22µF Tantalum, I OUT = 1.5A 60 80 dB Thermal Resistance, Junction to Case TO-263/TO-252 SPAK °C/W Thermal Regulation T A = 25°C, 30ms pulse 0.002 0.02 %/W Thermal Shutdown 150 °C

FAN1582 PRODUCT SPECIFICATION REV. 1.1.2 2/26/03 Typical Perfomance Characteristics T=0°C T=125°CT=25°C 1.0 0.9 0.8 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 0 0.5 1 2 3 1.5 2.5 DROPOUT VOLTAGE (V)REFERENCE VOLTAGE MINIMUM LOAD CURRENT (mA) OUTPUT CURRENT (A) Dropout Voltage vs. Output Current Load Regulation vs. Temperature Reference Voltage vs. Temperature Output Voltage vs. Temperature Mimimum Load Current vs. Temperature Adjust Pin Current vs. Temperature 0.10 0.05 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 25 50 75 100 125 150 1750 OUTPUT VOLTAGE DEVIATION (%) JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) ∆Ι=3A 1.275 1.270 1.265 1.260 1.255 1.250 1.245 1.240 1.235 1.230 1.225 OUTPUT VOLTAGE (V) ADJUST PIN CURRENT (µA) 3.70 3.65 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 3.20 100 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) -75 -50 -25 0 25 50 75 100 125 150 175 VOUT set with 1% resistors VOUT = 3.3V1 Note: 1. FAN1582 Only Note: 1. FAN1582 Only

PRODUCT SPECIFICATION FAN1582 REV. 1.1.2 2/26/03 5 Typical Perfomance Characteristics (continued) SHORT-CIRCUIT CURRENT (A) POWER (W) RIPPLE REJECTIONS (dB) -75 -50 -25 25 50 75 100 125 150 175 25 45 65 85 105 125 JUNCTION TEMPERATURE (°C) CASE TEMPERATURE FREQUENCY (HZ) (VIN— VOUT) ≤ 3V 0.5V ≤ VRIPPLE ≤ 2V IOUT = 3A 10 100 1K 10K 100K Short-Circuit Current vs.Temeperature Ripple Rejection vs. Frequency Maximum Power Dissipation General The FAN1582, FAN1582-1.5, and FAN1582-2.5 are three- terminal regulators optimized for GTL+ VTT termination and logic applications. These devices are short-circuit protected, and offer thermal shutdown to turn off the regulator when the junction temperature exceeds about 150°C. The FAN1582 series provides low dropout voltage and fast transient response. Frequency compensation uses capacitors with low ESR while still maintaining stability. This is critical in addressing the needs of low voltage high speed microproces- sor buses like GTL+. VIN and VCNTL Functions The FAN1582 utilizes a dual supply approach to maximize efficiency. The collector of the power device is brought out to the V IN pin to minimize internal power dissipation under high current loads. VCNTL provides power for the control circuitry and the drive for the output NPN transistor. VCNTL should be at least 1.2 V higher than the output voltage. Special care was taken to ensure there are no supply- sequencing problems. The output voltage will not turn on until both supplies are operating. If the control voltage comes up first, the output current will be typically limited to about 3.0 mA until the power input voltage comes up. If the power input voltage comes up first the output will not turn on at all until the control voltage comes up. The output can never come up unregulated. The FAN1582 can also be used as a single supply device with the control and power inputs tied together. In this mode, the dropout is determined by the minimum control voltage. Stability The FAN1582 series requires an output capacitor as a part of the frequency compensation. It is recommended to use a 22µF solid tantalum or a 100µF aluminum electrolytic on the output to ensure stability. The frequency compensation of these devices optimizes the frequency response with low ESR capaci- tors. In general, it is suggested to use capacitors with an ESR of <0.3Ω. It is also recommended to use bypass capacitors such as a 22µF tantalum or a 100µF aluminum on the adjust

  • V OUT = 1.47V worst case
  • I OUT = 3A continuous
  • T A = 70°C
  • Θ Case-to-Ambient = 5°C/W (assuming both a heatsink and a thermally conductive material) The power dissipation in this application is: PD = (VIN - VOUT) * (IOUT) = (3.6-1.47) * (3) = 6.39W From the specification table, T J = TA + (PD) * (Θ Case-to-Ambient + ΘJC) The junction temperature is below the maximum rating. 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 the package to the heat sink. Use of a thermally conductive material at the case-to-heat sink interface is recommended. Use a thermally conductive spacer if the case of the device must be electri- cally isolated and include its contribution to the total thermal resistance.

Figure 3. Application Circuit (FAN1582) Table 1. Bill of Materials for Application Circuit for the FAN1582

PRODUCT SPECIFICATION FAN1582 REV. 1.1.2 2/26/03 9 Mechanical Dimensions 5-Lead TO-263 Package 10.20 9.80 1.40 1.00 9.40 9.00

9.50 MIN

9.00 MIN

4.00 MIN

1.20 MIN

LAND PATTERN RECOMMENDATION 10.00 1.70 6.80 5.10 4.70 (1.28) (8.00) (4.40) 1.70 6.80 (1.75) (0.90) R0.45 –B– (6.80)

0.25 B AMM

1.37 1.17 0.90 0.70 15.60 15.00 2.84 2.24 SCALE: 10X 0.10 B SEATING PLANE 0.75 0.45 0.25 GAGE PLANE NOTES: UNLESS OTHERWISE SPECIFIED A) ALL DIMENSIONS ARE IN MILLIMETERS. B) STANDARD LEAD FINISH: 200 MICROINCHES / 5.08 MICROMETERS MIN. LEAD/TIN 15/85 ON COPPER. C) NO PACKAGE STANDARD REFERENCE AS OF JUNE 2002. D) DIMENSIONING AND TOLERANCING PER ANSI Y14.5M – 1982. DETAIL A, ROTATED 90° R0.56 1.40 1.14 4.70 4.30 SEE DETAIL A A

FAN1582 PRODUCT SPECIFICATION 10 REV. 1.1.2 2/26/03 Mechanical Dimensions (continued) 5-Lead TO-252 Package (2.90) 10° 1.78 1.40 GAGE PLANE 0.60 0.40 SEATING PLANE

0.13 MAX

(1.54) 0.51 (5.09) (4.05) SEE DETAIL A 0.25 M C MCA 1.27 0.50 1.02 0.60 5.64 5.04 6.25 A 2.40 2.18 B0.10 10.42 9.20 0.60 0.40

3.00 MIN

B

6.56 MIN

6.00 MIN

1.27 5.08 5 4 6.80 6.35 6.30 5.90 3.81 1.00(0.44) 1.27 1.27 LAND PATTERN RECOMMENDATION NOTES: UNLESS OTHERWISE SPECIFIED A) ALL DIMENSIONS ARE IN MILLIMETERS. B) THIS PACKAGE CONFORMS TO JEDEC, TO-252, ISSUE C, VARIATION AA, DATED NOV. 1999. (ROTATED 90°) SCALE: 2X DETAIL A

FAN1582 PRODUCT SPECIFICATION 11 REV. 1.1.2 2/26/03 Mechanical Dimensions (continued) 5-Lead SPAK Package C Seating Plane 0.005 (0.13) 0.001 (0.03) R Gage Plane B A L D M0.010 (0,25) 0.004 (0,10) 3°–6° Thermal Ta b (See Note 3) E Notes: 1. All linear dimensions are in inches (millimeters). 2. This drawing is subject to change without notice. 3. The center lead is in electrical contact with the thermal tab. 4. Dimensions do not include mold protrusions, not to exceed 0.006 (0,15). A 0.3600.350 Symbol Inches Min. Max. Min. Max. Millimeters Notes B 0.220 NOM 0.268 0.070C 0.080 c1 0.0500.040 D E L 0.4200.410 0.067

0.295 NOM

0° 8° e α c2 0.010 NOM 9.148.89 0.3750.365 9.52 9.27

5.59 NOM

6.81b1 b2 0.0310.025 0.790.63 1.78 2.03 1.271.02 10.6710.41 0.0410.031 1.04 0.79 1.72

7.49 NOM

0.25 NOM

0° 8° L2 0.3600.350 9.14 8.89 L3 0.3200.310 8.13 7.87 R 0.010 NOM 0.25 NOM e

FAN1582 PRODUCT SPECIFICATION 2/26/03 0.0m 002 Stock#DS30001584  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

Ordering Information

FAN1582MX TO-263 in Tape and Reel FAN1582PX SPAK in Tape and Reel FAN1582DX TO-252 DPAK in Tape and Reel FAN1582M15X TO-263 in Tape and Reel FAN1582P15X SPAK in Tape and Reel FAN1582D15X TO-252 DPAK in Tape and Reel FAN1582M25X TO-263 in Tape and Reel FAN1582P25X SPAK in Tape and Reel FAN1582D25X TO-252 DPAK in Tape and Reel