www.fairchildsemi.com FAN1117A 1A Adjustable/Fixed Low Dropout Linear Regulator Features Description • • • • • • The FAN1117A and FAN1117A-1.8, -2.5, -2.85, -3.3 and -5 are low dropout three-terminal regulators with 1A 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. Low dropout voltage Load regulation: 0.05% typical Trimmed current limit On-chip thermal limiting Standard SOT-223 and TO-252 packages Three-terminal adjustable or fixed 1.8V, 2.5V, 2.85V, 3.3V, 5V 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. Applications • • • • • • Active SCSI terminators High efficiency linear regulators Post regulators for switching supplies Battery chargers 12V to 5V linear regulators Motherboard clock supplies Unlike PNP type regulators where up to 10% of the output current is wasted as quiescent current, the quiescent current of the FAN1117A flows into the load, increasing efficiency. The FAN1117A series regulators are available in the industry-standard SOT-223 and TO-252 (DPAK) power packages. Typical Applications FAN1117A VIN = 12V VIN + VOUT 9V at 1A + 10µF 22µF 124Ω ADJ 768Ω FAN1117A-2.85 VIN = 12V + VIN VOUT 10µF 5V at 1A + 22µF GND REV. 1.0.2 4/27/01 PRODUCT SPECIFICATION FAN1117A Pin Assignments Tab is VOUT Front View Tab is VOUT 3 IN 2 OUT 1 ADJ/GND 1 2 3 4-Lead Plastic SOT-223 ΘJC = 15°C/W* ADJ/ OUT GND IN 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 Min. VIN (VIN – VOUT) * IOUT Max. Unit 18 V See Figure 1 Operating Junction Temperature Range Storage Temperature Range 0 125 °C -65 150 °C 300 °C Lead Temperature (Soldering, 10 sec.) 1.2 IOUT (A) 1.0 0.8 0.6 0.4 0.2 0 0 2 4 6 8 10 12 14 16 18 20 VIN – VOUT (V) Figure 1. Absolute Maximum Safe Operating Area 2 REV. 1.0.2 4/27/01 FAN1117A 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 Voltage3 Output Voltage4 Line Regulation1,2 Load Regulation1,2 Conditions Min. Typ. Max. Units • 1.225 (-2%) 1.250 1.275 (+2%) V 10mA ≤ IOUT ≤ 1A FAN1117A-1.8, 3.3V ≤ VIN ≤ 8.8V FAN1117A-2.5, 4V ≤ VIN ≤ 9.5V FAN1117A-2.85, 4.35V ≤ VIN ≤ 9.85V FAN1117A-3.3, 4.8V ≤ VIN ≤ 10.3V FAN1117A-5, 6.5V ≤ VIN ≤ 12V • • • • • 1.764 2.450 2.793 3.234 4.900 1.8 2.5 2.85 3.3 5.0 1.836 2.550 2.907 3.366 5.100 V V V V V (VOUT + 1.5V) ≤ VIN ≤ 12V, IOUT = 10mA • 0.005 0.2 % (VIN – VOUT) = 2V, 10mA ≤ IOUT ≤ 1A • 0.05 0.5 % 1.100 1.200 1.5V ≤ (VIN – VOUT) ≤ 7V, 10mA ≤ IOUT ≤ 1A Dropout Voltage ∆VREF = 1%, IOUT = 1A • Current Limit (VIN – VOUT) = 2V • Adjust Pin Current3 1.1 1.5 V A • 35 120 µA 1.5V ≤ (VIN – VOUT) ≤ 7V, 10mA ≤ IOUT ≤ 1A • 0.2 5 µA Minimum Load Current 1.5V ≤ (VIN – VOUT) ≤ 15V • Quiescent Current VIN = VOUT + 1.25V • 4 13 Ripple Rejection f = 120Hz, COUT = 22µF Tantalum, (VIN – VOUT) = 3V, IOUT = 1A Thermal Regulation TA = 25°C, 30ms pulse Adjust Pin Current Change3,4 60 mA 72 0.004 • Temperature Stability 10 mA dB 0.02 0.5 %/W % Long-Term Stability TA = 125°C, 1000hrs. 0.03 RMS Output Noise (% of VOUT) TA = 25°C, 10Hz ≤ f ≤ 10kHz 0.003 % Thermal Resistance, Junction SOT-223 to Case TO-252 15 °C/W 3 °C/W Thermal Shutdown 155 °C 10 °C Thermal Shutdown Hysteresis Junction Temperature 1.0 % 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. FAN1117A only. 4. Output current must be limited to meet the absolute maximum ratings of the part. REV. 1.0.2 4/27/01 3 PRODUCT SPECIFICATION FAN1117A Typical Performance Characteristics 0.10 DROPOUT VOLTAGE DEVIATION (%) DROPOUT VOLTAGE (V) 1.5 1.4 1.3 1.2 1.1 TJ = 0°C 1.0 0.9 TJ = 25°C 0.8 TJ = 125°C 0.7 0.6 0.5 0 0 0.2 0.4 0.6 0.8 0.05 0 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 0 1.0 OUTPUT CURRENT (A) 3.70 1.255 3.65 REFERENCE VOLTAGE (V) REFERENCE VOLTAGE (V) Figure 3. Load Regulation vs. Temperature 1.260 1.245 1.240 1.235 1.230 1.225 1.220 1.215 VOUT = 3.6V1 3.60 3.55 3.50 3.45 3.40 3.35 VOUT = 3.3V 3.30 Note: 1. FAN1117A Only 3.20 -75 -50 -25 0 25 50 75 100 125 150 175 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) Figure 4. Reference Voltage vs. Temperature Figure 5. Output Voltage vs. Temperature 5 100 Note: 1. FAN1117A Only 90 ADJUST PIN CURRENT (µA) MINIMUM LOAD CURRENT (mA) VOUT SET WITH 1% RESISTORS 3.25 1.210 -75 -50 -25 0 4 3 2 1 80 70 60 50 40 30 20 10 0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 6. Minimum Load Current vs. Temperature 4 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 2. Dropout Voltage vs. Output Current 1.250 ∆I = 1A 0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 7. Adjust Pin Current vs. Temperature REV. 1.0.2 4/27/01 FAN1117A PRODUCT SPECIFICATION Typical Performance Characteristics (continued) 90 80 RIPPLE REJECTION (dB) SHORT-CIRCUIT CURRENT (A) 2.0 1.75 1.5 1.25 70 60 50 40 30 20 10 1.0 -75 -50 -25 0 (VIN - VOUT) = 3V 0.5 < VRIPPLE < 2V IOUT = 1A 0 10 25 50 75 100 125 150 175 100 JUNCTION TEMPERATURE (°C) 1K 10K 100K FREQUENCY (Hz) Figure 8. Short-Circuit Current vs. Temperature Figure 9. Ripple Rejection vs. Frequency 10 POWER (W) 7.5 TO-252 5 SOT-223 2.5 0 25 45 65 85 105 125 CASE TEMPERATURE (°C) Figure 10. Maximum Power Dissipation REV. 1.0.2 4/27/01 5 PRODUCT SPECIFICATION FAN1117A Mechanical Dimensions 4-Lead SOT-223 Package Inches Symbol Millimeters Min. Max. Min. Max. A A1 B c D — — .025 — .248 .071 .181 1.80 4.80 E e F H I J K L M N .130 .148 — — .640 — 6.30 3.30 .840 2.29 6.71 3.71 .115 .033 .264 .012 — 10° .0008 10° .010 .124 .041 .287 — 10° 16° .0040 16° .014 2.95 .840 6.71 .310 — 10° .0203 10° .250 3.15 1.04 7.29 — 10° 16° .1018 16° .360 .033 .090 .264 Notes D e K A H E N J M B I L A1 c 6 F REV. 1.0.2 4/27/01 FAN1117A PRODUCT SPECIFICATION Mechanical Dimensions 3-Lead TO-252 Package Symbol Inches Millimeters Notes: Notes Min. Max. Min. Max. A b b2 b3 c c2 .086 .025 .030 .205 .018 .018 .094 .035 2.19 0.64 0.76 5.21 0.46 0.46 2.39 0.89 D E e H 5.33 6.22 6.35 6.73 2.29 BSC 9.40 10.41 1.40 1.78 2.74 REF 1 L L1 .210 .245 .250 .265 .090 BSC .370 .410 .055 .070 .108 REF L3 L4 .035 .025 0.89 0.64 4 .045 .215 .024 .023 .080 .040 1.14 5.46 0.61 0.58 2.03 1.02 E @PKG/ @HEATSINK b3 4 1 1. Dimensions are exclusive of mold flash, metal burrs or interlead protrusion. 2. Stand off-height is measured from lead tip with ref. to Datum -B-. 3. Foot length is measured with ref. to Datum -A- with lead surface. 4. Thermal pad contour optional within dimension b3 and L3. 5. Formed leads to be planar with respect to one another at seating place -C-. 6. Dimensions and tolerances per ASME Y14.5M-1994. 3 L3 c2 D E-PIN H L4 b2 L1 L b e -B- α = 0° – 10° -A- A -C- REV. 1.0.2 4/27/01 7 PRODUCT SPECIFICATION FAN1117A Ordering Information Product Number Package FAN1117AD TO-252 FAN1117AS SOT-223 FAN1117AD-1.8 TO-252 FAN1117AS-1.8 SOT-223 FAN1117AD-2.5 TO-252 FAN1117AS-2.5 SOT-223 FAN1117AD-2.85 TO-252 FAN1117AS-2.85 SOT-223 FAN1117AD-3.3 TO-252 FAN1117AS-3.3 SOT-223 FAN1117AD-5 TO-252 FAN1117AS-5 SOT-223 DISCLAIMER FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. 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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 4/27/01 0.0m 007 Stock#DS30001117A 2001 Fairchild Semiconductor Corporation