FAN1086 FAIRCHILD | Alldatasheet

Document overview

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Technical content

Features

  • Low dropout voltage
  • Load regulation: 0.05% typical
  • Trimmed current limit
  • On-chip thermal limiting
  • Standard SOT-223, TO-263, and TO-252 packages
  • Three-terminal adjustable or fixed 2.5V , 2.85V , 3.3V , 5V

Applications

  • Active SCSI terminators
  • High efficiency linear regulators
  • Post regulators for switching supplies
  • Battery chargers
  • 5V to 3.3V linear regulators
  • Motherboard clock supplies

Description

The FAN1086 and FAN1086-2.5, -2.85, -3.3 and -5 are low dropout three-terminal regulators with 1.5A output current capability. These devices have been optimized for low voltage where transient response and minimum input voltage are critical. The 2.85V version is designed specifically to be used in Active Terminators for SCSI bus. 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 temperatures that would create excessive junction temperatures. Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the FAN1086 flows into the load, increasing efficiency. The FAN1086 series regulators are available in the industry- standard SOT-223, TO-263, and TO-252 power packages. Typical Applications VIN = 3.3V VOUT = VREF (1 + R2/R1) + IAdj • R2 VIN VOUT ADJ 1.5V at 1.5A FAN1086 10µF2 2 µF 124Ω 24.9Ω VIN = 5V V IN VOUT GND 2.85V at 1.5A FAN1086-2.85 10µF + + 22µF FAN1086 1.5A Adjustable/Fixed Low Dropout Linear Regulator

PRODUCT SPECIFICATION FAN1086 Pin Assignments *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 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W. Absolute Maximum Ratings Parameter Min. Max. Unit V IN 7.5 V Operating Junction Temperature Range 0 125 C Storage Temperature Range -65 150 C Lead Temperature (Soldering, 10 sec.) 300 C Front View 4-Lead Plastic SOT -223 Θ JC = 15°C/W* 3-Lead Plastic TO-263 Θ JC = 3°C/W* 3-Lead Plastic TO-252 Θ JC = 3°C/W* Tab is VOUT Tab is VOUT ADJ/ GND OUT IN Tab is VOUT ADJ/ GND IN IN OUT ADJ/GND

FAN1086 PRODUCT SPECIFICATION

Electrical Characteristics

Operating Conditions: V IN 7V, T J = 25°C 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. 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. FAN1086 only. Parameter Conditions Min. Typ. Max. Units Reference Voltage , V REF 1.5V IN - V OUT 5.75V, 10mA I OUT 1.225 (-2%) 1.250 1.275 (+2%) V Output Voltage 10mA I OUT FAN1086-2.5, 4V V IN FAN1086-2.85, 4.35V V IN FAN1086-3.3, 4.8V V IN FAN1086-5, 6.5V V IN 2.450 2.793 3.234 4.900 2.5 2.85 3.3 5.0 2.550 2.907 3.366 5.100 V V V V Line Regulation 1,2 OUT + 1.5V) V IN 7V, I OUT = 10mA 0.005 0.2 % Load Regulation 1,2 IN – V OUT ) = 2V, 10mA I OUT 0.05 0.5 % Dropout Voltage V REF = 1%, I OUT = 1.5A 1.300 1.500 V Current Limit (V IN – V OUT ) = 2V 1.6 2.0 A Adjust Pin Current , I Adj 35 120 µ A Adjust Pin Current Change 1.5V IN – V OUT 5.75, 10mA I OUT 0.2 5 µ A Minimum Load Current 1.5V IN – V OUT 5.75 10 mA Quiescent Current V IN = V OUT + 1.25V 41 3 m A Ripple Rejection f = 120Hz, C OUT = 22 µ F Tantalum, IN – V OUT ) = 3V, I OUT = 1.5A 60 72 dB Thermal Regulation T A = 25 C, 30ms pulse 0.004 0.02 %/W Temperature Stability 0.5 % Long-Term Stability T A = 125 C, 1000hrs. 0.03 1.0 % RMS Output Noise (% of V OUT T A = 25 C, 10Hz f 10kHz 0.003 % Thermal Resistance, Juncation to Case SOT-223 15 C/W TO-263, TO-252 3 C/W Thermal Shutdown Junction Temperature 155 C Thermal Shutdown Hysteresis C

0 MINIMUM LOAD CURRENT (mA)

Figure 1. Dropout Voltage vs. Output Current Figure 2. Load Regulation vs. Temperature Figure 3. Reference Voltage vs. Temperature Figure 4. Output Voltage vs. Temperature Figure 5. Minimum Load Current vs. Temperature Figure 6. Adjust Pin Current vs. Temperature

PRODUCT SPECIFICATION FAN1086 6 REV. 1.0.7 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-.

2.54 BSC

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

FAN1086 PRODUCT SPECIFICATION REV. 1.0.7 11/10/03 7 Mechanical Dimensions 4-Lead SOT-223 Package A — .071 Symbol Inches Min. Max. Min. Max. Millimeters Notes A1 — .181 .033B .025 c — .090 E .130 .148 e H .264 .287 .115 .124 .033 .041 — 10° F F I J D .248 .264 — 1.80 — 4.80 .840.640 — 2.29 3.30 3.71 6.71 7.29 .012 — .310 — 2.95 3.15 .840 1.04 — 10° 10° 16°K 10° 16° .0008 .0040L .0203 .1018 10° 16°M 10° 16° .010 .014N .250 .360 6.30 6.71 A D e E c H B I J K L M N

PRODUCT SPECIFICATION FAN1086 8 REV. 1.0.7 11/10/03 Mechanical Dimensions 3-Lead TO-252 Package A .086 .094 2.19 2.39 Symbol Inches Min. Max. Min. Max. Millimeters Notes b .025 .035 0.64 0.89 .045 1.14b2 .030 0.76 .215 5.46 4 b3 .205 5.21 c2 .018 .023 0.46 0.58 c .018 .024 0.46 0.61 D .210 .245 5.33 6.22 1 1E .250 .265 6.35 6.73 .090 BSC 2.29 BSC .055 .070 1.40 1.78 e L .370 .410 9.40 10.41H L1 .108 REF 2.74 REF .035 .080 0.89 2.03 .025 .040 0.64 1.02 E @PKG/ @HEATSINK D A -C- H L α = 0°–10° -A--B- E-PIN b c e Notes: Dimensions are exclusive of mold flash and metal burrs. Stand off-height is measured from lead tip with ref. to Datum -B-. Foot length is measured with ref. to Datum -A- with lead surface. Thermal pad contour optional within dimensions b3 and L3 Formed leads to be planar with respect to one another at seating plane -C-. Dimensions and tolerances per ASME Y14.5M-1994.

PRODUCT SPECIFICATION FAN1086 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 11/10/03 0.0m 004 Stock#DS30001117  2001 Fairchild Semiconductor Corporation

Ordering Information

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.