FAN1086S285X

www.fairchildsemi.com FAN1086 1.5A Adjustable/Fixed Low Dropout Linear Regulator 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 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 industrystandard SOT-223, TO-263, and TO-252 power packages. Applications • • • • • • Active SCSI terminators High efficiency linear regulators Post regulators for switching supplies Battery chargers 5V to 3.3V linear regulators Motherboard clock supplies Typical Applications FAN1086 VIN = 3.3V 10µF + VIN ADJ VOUT R1 124Ω + 1.5V at 1.5A 22µF VOUT = VREF(1 + R2/R1) + IAdj • R2 R2 24.9Ω FAN1086-2.85 VIN = 5V 10µF + VIN GND VOUT + 2.85V at 1.5A 22µF REV. 1.0.7 11/10/03 PRODUCT SPECIFICATION FAN1086 Pin Assignments Front View 3 Tab is VOUT 2 1 IN OUT ADJ/GND 1 2 3 Tab is VOUT Tab is VOUT 4-Lead Plastic SOT-223 ΘJC = 15°C/W* 1 2 3 ADJ/ GND OUT IN ADJ/ GND IN 3-Lead Plastic TO-263 ΘJC = 3°C/W* 3-Lead Plastic TO-252 ΘJC = 3°C/W* *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 50°C/W. Other mounting techniques may provide better thermal resistance than 30°C/W. Absolute Maximum Ratings Parameter VIN Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) 0 -65 Min. Max. 7.5 125 150 300 Unit V °C °C °C 2 REV. 1.0.7 11/10/03 FAN1086 PRODUCT SPECIFICATION Electrical Characteristics Operating Conditions: VIN ≤ 7V, TJ = 25°C unless otherwise specified. The • denotes specifications which apply over the specified operating temperature range. Parameter Reference Voltage , VREF Output Voltage 3 Conditions 1.5V ≤ (VIN - VOUT) ≤ 5.75V, 10mA ≤ IOUT ≤ 1A 10mA ≤ IOUT ≤ 1A FAN1086-2.5, 4V ≤ VIN ≤ 7V FAN1086-2.85, 4.35V ≤ VIN ≤ 7V FAN1086-3.3, 4.8V ≤ VIN ≤ 7V FAN1086-5, 6.5V ≤ VIN ≤ 7V (VOUT + 1.5V) ≤ VIN ≤ 7V, IOUT = 10mA (VIN – VOUT) = 2V, 10mA ≤ IOUT ≤ 1A ∆VREF = 1%, IOUT = 1.5A (VIN – VOUT) = 2V 1.5V ≤ (VIN – VOUT) ≤ 5.75, 10mA ≤ IOUT ≤ 1A 1.5V ≤ (VIN – VOUT) ≤ 5.75 VIN = VOUT + 1.25V f = 120Hz, COUT = 22µF Tantalum, (VIN – VOUT) = 3V, IOUT = 1.5A TA = 25°C, 30ms pulse • TA = 125°C, 1000hrs. TA = 25°C, 10Hz ≤ f ≤ 10kHz SOT-223 TO-263, TO-252 Junction Temperature • Min. 1.225 (-2%) 2.450 2.793 3.234 4.900 Typ. 1.250 Max. 1.275 (+2%) 2.550 2.907 3.366 5.100 0.2 0.5 1.500 120 5 Units V • • • • • • • • • • • • 2.5 2.85 3.3 5.0 0.005 0.05 1.300 V V V V % % V A µA µA mA Line Regulation1,2 Load Regulation Dropout Voltage Current Limit Adjust Pin Current3, IAdj Adjust Pin Current Change3 Minimum Load Current Quiescent Current Ripple Rejection Thermal Regulation Temperature Stability Long-Term Stability RMS Output Noise (% of VOUT) Thermal Resistance, Juncation to Case Thermal Shutdown Thermal Shutdown Hysteresis 1,2 1.6 2.0 35 0.2 10 4 60 72 0.004 0.5 0.03 0.003 15 3 155 10 1.0 0.02 13 mA dB %/W % % % °C/W °C/W °C °C 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. REV. 1.0.7 11/10/03 3 PRODUCT SPECIFICATION FAN1086 Typical Performance Characteristics DROPOUT VOLTAGE DEVIATION (%) 1.5 1.4 DROPOUT VOLTAGE (V) 1.3 1.2 1.1 1.0 0.9 0.8 0.7 0.6 0.5 0 0 0.3 0.6 0.9 1.2 1.5 0.10 0.05 0 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 0 ∆I = 1A 25 50 75 100 125 150 175 OUTPUT CURRENT (A) JUNCTION TEMPERATURE (°C) Figure 1. Dropout Voltage vs. Output Current 1.250 1.245 REFERENCE VOLTAGE (V) Figure 2. Load Regulation vs. Temperature 3.70 3.65 REFERENCE VOLTAGE (V) 3.60 3.55 3.50 3.45 3.40 3.35 3.30 3.25 VOUT = 3.3V Note: 1. FAN1086 Only 25 50 75 100 125 150 175 VOUT SET WITH 1% RESISTORS VOUT = 3.6V1 1.240 1.235 1.230 1.225 1.220 1.215 1.210 1.205 1.200 -75 -50 -25 0 25 50 75 100 125 150 175 3.20 -75 -50 -25 0 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) Figure 3. Reference Voltage vs. Temperature 5 MINIMUM LOAD CURRENT (mA) Figure 4. Output Voltage vs. Temperature 100 90 ADJUST PIN CURRENT (µA) Note: 1. FAN1086 Only 4 80 70 60 50 40 30 20 10 3 2 1 0 -75 -50 -25 0 25 50 75 100 125 150 175 0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) Figure 5. Minimum Load Current vs. Temperature Figure 6. Adjust Pin Current vs. Temperature 4 REV. 1.0.7 11/10/03 FAN1086 PRODUCT SPECIFICATION Typical Performance Characteristics (continued) 2.0 SHORT-CIRCUIT CURRENT (A) 90 80 RIPPLE REJECTION (dB) 1.75 70 60 50 40 30 20 10 1.0 -75 -50 -25 0 25 50 75 100 125 150 175 0 10 (VIN - VOUT) = 3V 0.5 < VRIPPLE < 2V IOUT = 1A 100 1K 10K 100K 1.5 1.25 JUNCTION TEMPERATURE (°C) FREQUENCY (Hz) Figure 7. Short-Circuit Current vs. Temperature Figure 8. Ripple Rejection vs. Frequency 10 OUTPUT CAP'S ESR (mΩ) 5000 10ma < IOUT < IMAX 7.5 POWER (W) TO-263 5 4000 3000 VIN = 5V 2000 Instability Region Region of Stability (SOA) 2.5 SOT-223 1000 0 25 0 45 65 85 105 125 0 1 2 3 4 5 6 7 8 9 10 CASE TEMPERATURE (°C) VOUT (V) Figure 9. Maximum Power Dissipation Figure 11. Stability Region (SOA) vs. ESR of the COUT REV. 1.0.7 11/10/03 5 PRODUCT SPECIFICATION FAN1086 Mechanical Dimensions 3-Lead TO-263 Package Symbol A b b2 c2 D E e L L1 L2 R α Inches Min. .160 .020 Max. .190 .036 Millimeters Min. 4.06 0.51 Max. 4.83 0.91 Notes 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-. .049 .051 .045 .055 .340 .380 .380 .405 .100 BSC .575 .090 — .017 0° .625 .110 .055 .019 8° 1.25 1.30 1.14 1.40 8.64 9.65 9.65 10.29 2.54 BSC 14.61 2.29 — 0.43 0° 15.88 2.79 1.40 0.78 8° E @PKG/ @HEATSINK L2 c2 D L b2 E-PIN R (2 PLCS) L1 b e -B- -A- A -C- 6 REV. 1.0.7 11/10/03 FAN1086 PRODUCT SPECIFICATION Mechanical Dimensions 4-Lead SOT-223 Package Inches Min. A A1 B c D E e F H I J K L M N — — .025 — .248 .130 .115 .033 .264 .012 — 10° .0008 10° .010 Max. .071 .181 .033 .090 .264 .148 .124 .041 .287 — 10° 16° .0040 16° .014 Millimeters Min. — — .640 — 6.30 3.30 2.95 .840 6.71 .310 — 10° .0203 10° .250 Max. 1.80 4.80 .840 2.29 6.71 3.71 3.15 1.04 7.29 — 10° 16° .1018 16° .360 Symbol Notes D e K A H E B A1 c F J M I L N REV. 1.0.7 11/10/03 7 PRODUCT SPECIFICATION FAN1086 Mechanical Dimensions 3-Lead TO-252 Package Symbol A b b2 b3 c c2 D E e H L L1 L3 L4 Inches Min. Max. Millimeters Min. Max. Notes: Notes 1. 2. 3. 4. 4 5. 6. 1 1 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. .086 .094 .025 .035 .030 .045 .205 .215 .018 .024 .018 .023 .210 .245 .250 .265 .090 BSC .370 .410 .055 .070 .108 REF .035 .080 .025 .040 2.19 2.39 0.64 0.89 0.76 1.14 5.21 5.46 0.46 0.61 0.46 0.58 5.33 6.22 6.35 6.73 2.29 BSC 9.40 10.41 1.40 1.78 2.74 REF 0.89 2.03 0.64 1.02 3 4 @PKG/ @HEATSINK E b3 L3 c2 D H E-PIN L4 b2 L1 L c b e -B- α = 0°–10° -A- A -C- 8 REV. 1.0.7 11/10/03 PRODUCT SPECIFICATION FAN1086 Ordering Information Product Number FAN1086DX FAN1086MX FAN1086SX FAN1086D25X FAN1086M25X FAN1086S25X FAN1086D285X FAN1086M285X FAN1086S285X FAN1086D33X FAN1086M33X FAN1086S33X FAN1086D5X FAN1086M5X FAN1086S5X Package TO-252 TO-263 SOT-223 TO-252 TO-263 SOT-223 TO-252 TO-263 SOT-223 TO-252 TO-263 SOT-223 TO-252 TO-263 SOT-223 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. 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. www.fairchildsemi.com 11/10/03 0.0m 004 Stock#DS30001117  2001 Fairchild Semiconductor Corporation 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.