FAN1585A FAN1585A-1 RC1585 FAN1585AT FAN1585AM-1 FAN1585AM FAN1585AT-1

FAN1585A 5.4A Adjustable/Fixed Low Dropout Linear Regulator Features Description · · · · ·

www.fairchildsemi.com FAN1585A FAN1585A 5.4A Adjustable/Fixed Low Dropout Linear Regulator Features Description · · · · · · · The FAN1585A FAN1585A and FAN1585A-1 FAN1585A-1.5 are low dropout threeterminal regulators with 5.4A output current capability. These devices have been optimized for low voltage applications including VTT bus termination for FC-PGA, where transient response and minimum input voltage are critical. The FAN1585A-1 FAN1585A-1.5 offers fixed 1.5V with 5.4A current capabilities for AGTL+ bus VTT termination for FC-PGA. The FAN1585A FAN1585A is ideal for low voltage microprocessor applications requiring a regulated output from 1.5V to 3.6V with an input supply of 5V or less, or for FC-PGA applications with significant trace resistance. Fast transient response Low dropout voltage at up to 5.4A Higher current replacement for RC1585 RC1585 Load regulation: 0.05% typical Trimmed current limit On-chip thermal limiting Standard TO-220, TO-263 and TO-263 center cut packages Applications · AGTL+ bus supply for FC-PGA · Low voltage logic supply · Post regulator for switching supply 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 temperature that would create excessive junction temperatures. The FAN1585A FAN1585A series regulators are available in the industrystandard TO-220, TO-263 and TO-263 center cut power packages. Typical Applications FAN1585A FAN1585A VOUT VIN VIN = 3.3V 10µF + 1.5V at 5.4A + ADJ 124 22µF 24.9 FAN1585A-1 FAN1585A-1.5 VIN VOUT VIN = 3.3V + 10µF GND 1.5V at 5.4A + 22µF Rev. 1.0.5 7/13/00 FAN1585A FAN1585A PRODUCT SPECIFICATION Pin Assignments FAN1585AT FAN1585AT FRONT VIEW FAN1585AM-1 FAN1585AM-1.5 FRONT VIEW FAN1585AM FAN1585AM FRONT VIEW FAN1585AT-1 FAN1585AT-1.5 FRONT VIEW 1 1 2 3 GND OUT IN 1 2 2 3 1 2 3 3 ADJ OUT IN ADJ OUT IN 3-Lead Plastic TO-263 JC = 3°C/W* GND OUT IN 3-Lead Plastic TO-220 JC = 3°C/W FAN1585AMC-1 FAN1585AMC-1.5 FAN1585AMC FAN1585AMC FRONT VIEW FRONT VIEW Tab is Out. 1 GND 2 3 1 IN 2 3 ADJ IN 3-Lead Plastic TO-263 Center Cut JA = 3°C/W* * JA can vary from 20°C/W to >40°C/W with various mounting techniques. Absolute Maximum Ratings Parameter Min. Max. Unit 7 V 0 125 °C -65 150 °C 300 °C VIN Operating Junction Temperature Range Storage Temperature Range Lead Temperature (Soldering, 10 sec.) 2 REV. 1.0.5 PRODUCT SPECIFICATION FAN1585A FAN1585A Electrical Characteristics Tj = 25°C unless otherwise specified. The · denotes specifications which apply over the specified operating temperature range. Parameter Conditions Min. Typ. Max Units Reference Voltage 1.5V (VIN VOUT) 5.75V, 10mA IOUT 5.4A · 1.225 (-2%) 1.250 1.275 (+2%) V Output Voltage4 3V VIN 7V 10mA IOUT 5.4A · 1.47 1.5 1.53 V Line Regulation1, 2 (VOUT + 1.5V) VIN 7V, IOUT = 10mA · 0.005 0.2 % Load Regulation1, 2, 3 (VIN VOUT) = 3V, 10mA IOUT 5.4A · 0.05 0.5 % Dropout Voltage VREF = 1%, IOUT = 5.4A · 1.150 1.300 V Current Limit (VIN VOUT) = 2V · 3 5.5 5.9 A Adjust Pin Current3 · 35 120 µA Adjust Pin Current Change3 1.5V (VIN VOUT) 5.75V, 10mA IOUT 5.4A · 0.2 5 µA Minimum Load Current 1.5V (VIN VOUT) 5.75V · Quiescent Current VIN = 5V · Ripple Rejection f = 120Hz, COUT = 22µF Tantalum, (VIN VOUT) = 3V, IOUT = 5.4A Thermal Regulation TA = 25°C, 30ms pulse mA 4 60 13 72 0.004 · Temperature Stability 10 mA dB 0.02 0.5 %/W % Long-Term Stability TA = 125°C, 1000 hrs. 0.03 RMS Output Noise (% of VOUT) TA = 25°C, 10Hz f 10kHz 0.003 % Thermal Resistance, Junction to Case TO-220 3 °C/W TO-263 3 °C/W 150 °C Thermal Shutdown 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. 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. FAN1585A FAN1585A only. 4. FAN1585A-1 FAN1585A-1.5 only. REV. 1.0.5 3 FAN1585A FAN1585A PRODUCT SPECIFICATION Typical Performance Characteristics 1.5 0.10 OUTPUT VOLTAGE DEVIATION (%) DROPOUT VOLTAGE (V) 1.4 1.3 1.2 1.1 1.0 T=0°C 0.9 T=125°C T=25°C 0.8 0.7 0.6 0.5 0 1 2 3 4 5 0.05 0 -0.05 -0.10 -0.15 -0.20 -75 -50 -25 6 25 50 75 100 125 150 175 Figure 2. Load Regulation vs. Temperature 1.250 3.70 1.245 3.65 1.240 3.60 VOUT set with 1% Resistors REFERENCE VOLTAGE (V) REFERENCE VOLTAGE (V) 0 JUNCTION TEMPERATURE (°C) OUTPUT CURRENT (A) Figure 1. Dropout Voltage vs. Output Current I = 5.4A 1.235 1.230 1.225 1.220 1.215 1.210 3.55 3.50 3.45 3.40 3.35 3.30 1.205 1 VOUT = 3.3V Note: 1. FAN1585A FAN1585A Only 3.25 1.200 -75 -50 -25 0 3.20 -75 -50 -25 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 3. Reference Voltage vs. Temperature 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 4. Output Voltage vs. Temperature 5 100 Note: 1. FAN1585A FAN1585A Only 90 ADJUST PIN CURRENT (µA) MINIMUM LOAD CURRENT (mA) 1 VOUT = 3.6V 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 5. Minimum Load Current vs. Temperature 4 0 -75 -50 -25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) Figure 6. Adjust Pin Current vs. Temperature REV. 1.0.5 PRODUCT SPECIFICATION FAN1585A FAN1585A Typical Performance Characteristics (continued) 8.0 90 RIPPLE REJECTIONS (dB) SHORT-CIRCUIT CURRENT (A) 80 7.0 6.0 5.0 70 60 50 40 30 20 10 4.0 -75 -50 -25 0 25 50 75 100 125 150 175 (VIN VOUT) 3V 0.5V VRIPPLE 2V IOUT = 5.4A 0 10 JUNCTION TEMPERATURE (°C) 100 1K 10K 100K FREQUENCY (Hz) Figure 7. Short-Circuit Current vs. Temperature Figure 8. Ripple Rejection vs. Frequency POWER (W) 20 15 10 5 0 50 60 70 80 90 100 110 120 130 140 150 CASE TEMPERATURE (°C) Figure 9. Maximum Power Dissipation REV. 1.0.5 5 FAN1585A FAN1585A PRODUCT SPECIFICATION Applications Information General The FAN1585A FAN1585A and FAN1585A-1 FAN1585A-1.5 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 FAN1585A FAN1585A 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 microprocessor buses like GTL+. D1 1N4002 1N4002 (OPTIONAL) FAN1585A FAN1585A VIN + C1 10µF IN OUT ADJ + R1 VOUT C2 22µF + CADJ R2 Stability The FAN1585A FAN1585A series requires an output capacitor as a part of the frequency compensation. It is recommended to use a 22µF solid tantalum or a 100 µF aluminum electrolytic on the output to ensure stability. The frequency compensation of these devices optimizes the frequency response with low ESR capacitors. In general, it is suggested to use capacitors with an ESR of