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| CS5205-1, CS5205-3, CS5205-5 5.0 A Adjustable, and 3.3 V and 5.0 V Fixed Linear Regulators The CS5205-x series of linear regulators provides 5.0 A at adjustable and fixed voltages with an accuracy of 1.0% and 2.0% respectively. The adjustable version uses two external resistors to set the output voltage within a 1.25 V to 13 V range. The regulators are intended for use as post regulators and microprocessor supplies. The fast loop response and low dropout voltage make these regulators ideal for applications where low voltage operation and good transient response are important. The circuit is designed to operate with dropout voltages as low as 1.0 V depending on the output current level. The maximum quiescent current is only 10 mA at full load. The regulators are fully protected against overload conditions with protection circuitry for Safe Operating Area (SOA), overcurrent and thermal shutdown. The CS5205-x is pin compatible with the LT1084 family of linear regulators but has lower dropout voltage. The regulators are available in TO-220-3 and surface mount D2PAK-3 packages. http://onsemi.com Adjustable Output TO-220-3 T SUFFIX CASE 221A Tab = VOUT Pin 1. Adj 2. VOUT 3. VIN Fixed Output D2PAK-3 DP SUFFIX CASE 418AB 12 3 Tab = VOUT Pin 1. GND 2. VOUT 3. VIN 1 2 3 MARKING DIAGRAMS TO-220-3 D2PAK-3 * * * * * Features Output Current to 5.0 A Output Trimmed to 1.0% Dropout Voltage 1.2 V @ 5.0 A Fast Transient Response Fault Protection Circuitry - Thermal Shutdown - Overcurrent Protection - Safe Area Protection CS5205-x AWLYWW CS5205-x AWLYWW 1 1 x A WL, L YY, Y WW, W = 1, 3, or 5 = Assembly Location = Wafer Lot = Year = Work Week ORDERING INFORMATION VOUT VIN See detailed ordering and shipping information in the package dimensions section on page 7 of this data sheet. Output Current Limit Thermal Shutdown -+ Error Amplifier Adj Bandgap Figure 1. Block Diagram - CS5205-1 (c) Semiconductor Components Industries, LLC, 2004 1 January, 2004- Rev. 7 Publication Order Number: CS5205-1/D CS5205-1, CS5205-3, CS5205-5 VOUT VIN Output Current Limit Thermal Shutdown - + Error Amplifier Bandgap GND Figure 2. Block Diagram - CS5205-3, -5 MAXIMUM RATINGS* Parameter Supply Voltage, VCC Operating Temperature Range Junction Temperature Storage Temperature Range Lead Temperature Soldering: 1. 10 second maximum. 2. 60 second maximum above 183C. *The maximum package power dissipation must be observed. Wave Solder (through hole styles only) Note 1 Reflow (SMD styles only) Note 2 Value 17 -40 to +70 150 -60 to +150 260 Peak 230 Peak Unit V C C C C C ELECTRICAL CHARACTERISTICS (CIN = 10 mF, COUT = 22 mF Tantalum, VIN - VOUT = 3.0 V, VIN 15 V, 0C TA 70C, TJ +150C, unless otherwise specified, Ifull load = 5.0 A.) Characteristic Adjustable Output Voltage (CS5205-1) Reference Voltage (Notes 3 and 4) Line Regulation Load Regulation (Notes 3 and 4) Dropout Voltage (Note 5) Current Limit Minimum Load Current Adjust Pin Current Adjust Pin Current Change Thermal Regulation VIN - VOUT = 1.5 V; VAdj = 0 V, 10 mA IOUT 5.0 A 1.5 V VIN - VOUT 6.0 V; IOUT = 10 mA VIN - VOUT = 1.5 V; 10 mA IOUT 5.0 A IOUT = 5.0 A VIN - VOUT = 3.0 V; TJ 25C VIN - VOUT = 9.0 V VIN - VOUT = 7.0 V - 1.5 V VIN - VOUT 4.0 V; 10 mA IOUT 5.0 A 30 ms pulse; TA = 25C 1.241 (-1%) - - - 5.5 - - - - - 1.254 0.04 0.08 1.2 8.5 1.0 1.2 50 0.2 0.003 1.266 (+1%) 0.20 0.4 1.3 - - 6.0 100 5.0 - V % % V A A mA mA mA %W Test Conditions Min Typ Max Unit 3. Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in output voltage due to thermal gradients or temperature changes must be taken into account separately. 4. Specifications apply for an external Kelvin sense connection at a point on the output pin 1/4" from the bottom of the package. 5. Dropout voltage is a measurement of the minimum input/output differential at full load. http://onsemi.com 2 CS5205-1, CS5205-3, CS5205-5 ELECTRICAL CHARACTERISTICS (continued) (CIN = 10 mF, COUT = 22 mF Tantalum, VIN - VOUT = 3.0 V, VIN 15 V, 0C TA 70C, TJ +150C, unless otherwise specified, Ifull load = 5.0 A.) Characteristic Adjustable Output Voltage (CS5205-1) (continued) Ripple Rejection Temperature Stability RMS Output Noise Thermal Shutdown Thermal Shutdown Hysteresis f = 120 Hz; CAdj = 25 mF; IOUT = 5.0 A - 10 Hz f 10 kHz; TA = 25C - - - - - 150 - 82 0.5 0.003 180 25 - - - - - dB % %VOUT C C Test Conditions Min Typ Max Unit ELECTRICAL CHARACTERISTICS (CIN = 10 mF, COUT = 22 mF Tantalum, VIN - VOUT = 3.0 V, VIN 10 V, 0C TA 70C, TJ +150C, unless otherwise specified, Ifull load = 5.0 A.) Characteristic Fixed Output Voltage (CS5205-3, CS5205-5) Reference Voltage (Notes 6 and 7) CS5205-5 CS5205-3 Line Regulation Load Regulation (Notes 6 and 7) Dropout Voltage (Note 8) Current Limit Quiescent Current Thermal Regulation Ripple Rejection Temperature Stability RMS Output Noise (%VOUT) Thermal Shutdown Thermal Shutdown Hysteresis 10 Hz f 10 kHz - - VIN - VOUT = 1.5 V; 0 IOUT 5.0 A VIN - VOUT = 1.5 V; 0 IOUT 5.0 A 1.5 V VIN - VOUT 6.0 V; IOUT = 10 mA VIN - VOUT = 1.5 V; 10 mA IOUT 5.0 A IOUT = 5.0 A VIN - VOUT = 3.0 V; TJ 25C VIN - VOUT = 9.0 V VIN 9.0 V; IOUT = 10 mA 30 ms pulse; TA = 25C f = 120 Hz; IOUT = 5.0 A - 4.9 (-2%) 3.234 (-2%) - - - 5.5 - - - - - - 150 - 5.0 3.3 0.04 0.08 1.2 8.5 1.0 5.0 0.003 75 0.5 0.003 180 25 5.1 (+2%) 3.366 (+2%) 0.20 0.40 1.3 - - 10 - - - - - - V V % % V A A mA %W dB % %VOUT C C Test Conditions Min Typ Max Unit 6. Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in output voltage due to thermal gradients or temperature changes must be taken into account separately. 7. Specifications apply for an external Kelvin sense connection at a point on the output pin 1/4" from the bottom of the package. 8. Dropout voltage is a measurement of the minimum input/output differential at full load. PACKAGE PIN DESCRIPTION Package Pin Number CS5205-1 D2PAK-3 1 2 3 N/A TO-220-3 1 2 3 N/A CS5205-3, -5 D2PAK-3 N/A 2 3 1 TO-220-3 N/A 2 3 1 Pin Symbol Adj VOUT VIN GND Function Adjust pin (low side of the internal reference). Regulated output voltage (case). Input voltage. Ground connection. http://onsemi.com 3 CS5205-1, CS5205-3, CS5205-5 TYPICAL PERFORMANCE CHARACTERISTICS 1.30 1.25 1.20 1.15 1.10 1.05 1.00 0.95 0.90 0.85 0.80 0.75 0.70 0 1 2 3 4 5 TCASE = 25C TCASE = 125C TCASE = 0C 0.10 0.08 Output Voltage Deviation (%) 0.06 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 -0.12 0 10 20 30 40 50 60 70 80 90 100 110 120 130 Dropout Voltage (V) Output Current (A) TJ (C) Figure 3. Dropout Voltage vs. Output Current 0.200 Output Voltage Deviation (%) Minimum Load Current (mA) 0.175 0.150 0.125 0.100 0.075 0.050 TCASE = 125C TCASE = 25C Figure 4. Reference Voltage vs. Temperature 2.500 2.175 TCASE = 0C 1.850 1.525 TCASE = 25C 1.200 0.875 TCASE = 125C 0.025 0.000 0 1 2 3 TCASE = 0C 0.550 4 5 1 2 3 4 5 6 7 8 9 Output Current (A) VIN - VOUT (V) Figure 5. Load Regulation vs. Output Current 70 IO = 10 mA Figure 6. Minimum Load Current 100 90 80 Ripple Rejection (dB) 70 60 50 40 30 20 10 TCASE = 25C 65 Adjust Pin Current (mA) 60 55 50 45 40 IOUT = 5.0 A (VIN - VOUT) = 3.0 V VRIPPLE = 1.6 VPP 0 10 20 30 40 50 60 70 80 90 100 110 120 130 0 101 102 103 104 105 Temperature (C) Frequency (Hz) Figure 7. Adjust Pin Current vs. Temperature Figure 8. Ripple Rejection vs. Frequency (Fixed Versions) http://onsemi.com 4 CS5205-1, CS5205-3, CS5205-5 100 90 80 Ripple Rejection (dB) 70 60 50 40 30 20 10 0 101 TCASE = 25C IOUT = 5.0 A (VIN - VOUT) = 3.0 V VRIPPLE = 1.6 VPP CAdj = 25 mF 102 103 104 105 Frequency (Hz) Figure 9. Ripple Rejection vs. Frequency (Adjustable Versions) APPLICATIONS INFORMATION The CS5205-x family of linear regulators provide fixed or adjustable voltages at currents up to 5.0 A. The regulators are protected against short circuit, and include thermal shutdown and safe area protection (SOA) circuitry. The SOA protection circuitry decreases the maximum available output current as the input-output differential voltage increases. The CS5205-x has a composite PNP-NPN output transistor and requires an output capacitor for stability. A detailed procedure for selecting this capacitor is included in the Stability Considerations section. Adjustable Operation VIN C1 VIN VOUT CS5205-1 Adj VREF R1 C2 VOUT IAdj CAdj R2 The adjustable regulator (CS5205-1) has an output voltage range of 1.25 V to 13 V. An external resistor divider sets the output voltage as shown in Figure 10. The regulator maintains a fixed 1.25 V (typical) reference between the output pin and the adjust pin. A resistor divider network R1 and R2 causes a fixed current to flow to ground. This current creates a voltage across R2 that adds to the 1.25 V across R1 and sets the overall output voltage. The adjust pin current (typically 50 mA) also flows through R2 and adds a small error that should be taken into account if precise adjustment of VOUT is necessary. The output voltage is set according to the formula: VOUT + VREF R1 ) R2 ) I Adj R1 R2 Figure 10. Resistor Divider Scheme for the Adjustable Version Stability Considerations The term IAdj x R2 represents the error added by the adjust pin current. R1 is chosen so that the minimum load current is at least 10 mA. R1 and R2 should be the same type, e.g. metal film for best tracking over temperature. The adjust pin is bypassed to improve the transient response and ripple rejection of the regulator. The output or compensation capacitor helps determine three main characteristics of a linear regulator: start-up delay, load transient response and loop stability. The capacitor value and type is based on cost, availability, size and temperature constraints. A tantalum or aluminum electrolytic capacitor is best, since a film or ceramic capacitor with almost zero ESR, can cause instability. The aluminum electrolytic capacitor is the least expensive solution. However, when the circuit operates at low temperatures, both the value and ESR of the capacitor will vary considerably. The capacitor manufacturers data sheet provides this information. A 22 mF tantalum capacitor will work for most applications, but with high current regulators such as the CS5205-x the transient response and stability improve with higher values of capacitor. The majority of applications for this regulator involve large changes in load current so the output capacitor must supply the instantaneous load current. http://onsemi.com 5 CS5205-1, CS5205-3, CS5205-5 The ESR of the output capacitor causes an immediate drop in output voltage given by: DV + DI ESR Output Voltage Sensing For microprocessor applications it is customary to use an output capacitor network consisting of several tantalum and ceramic capacitors in parallel. This reduces the overall ESR and reduces the instantaneous output voltage drop under load transient conditions. The output capacitor network should be as close as possible to the load for the best results. Protection Diodes Since the CS5205-x is a three terminal regulator, it is not possible to provide true remote load sensing. Load regulation is limited by the resistance of the conductors connecting the regulator to the load. For best results the fixed regulators should be connected as shown in Figure 13. Conductor Parasitic Resistance VIN VIN VOUT CS5205-x RC RLOAD When large external capacitors are used with a linear regulator it is sometimes necessary to add protection diodes. If the input voltage of the regulator gets shorted, the output capacitor will discharge into the output of the regulator. The discharge current depends on the value of the capacitor, the output voltage and the rate at which VIN drops. In the CS5205-x family of linear regulators, the discharge path is through a large junction and protection diodes are not usually needed. If the regulator is used with large values of output capacitance and the input voltage is instantaneously shorted to ground, damage can occur. In this case, a diode connected as shown in Figures 11 and 12 is recommended. IN4002 (optional) VIN C1 VIN VOUT CS5205-1 Adj R1 C2 VOUT GND Figure 13. Conductor Parasitic Resistance can be Minimized with the Above Grounding Scheme for Fixed Output Regulators For the adjustable regulator, the best load regulation occurs when R1 is connected directly to the output pin of the regulator as shown in Figure 14. If R1 is connected to the load, RC is multiplied by the divider ratio and the effective resistance between the regulator and the load becomes RC R1 ) R2 R1 where RC = conductor parasitic resistance. Conductor Parasitic Resistance CAdj R2 VIN VIN VOUT CS5205-1 R1 Adj RC RLOAD Figure 11. Protection Diode Scheme for Adjustable Output Regulator R2 IN4002 (optional) VIN C1 GND C2 VIN CS5205-x VOUT VOUT Figure 14. Grounding Scheme for Adjustable Output Regulator to Minimize Parasitics Figure 12. Protection Diode Scheme for Fixed Output Regulators http://onsemi.com 6 CS5205-1, CS5205-3, CS5205-5 Calculating Power Dissipation and Heat Sink Requirements The CS5205-x series of linear regulators includes thermal shutdown and current limit circuitry to protect the device. High power regulators such as these usually operate at high junction temperatures so it is important to calculate the power dissipation and junction temperatures accurately to ensure that an adequate heat sink is used. The case is connected to VOUT on the CS5205-x, electrical isolation may be required for some applications. Thermal compound should always be used with high current regulators such as these. The thermal characteristics of an IC depend on the following four factors: 1. 2. 3. 4. Maximum Ambient Temperature TA (C) Power dissipation PD (Watts) Maximum junction temperature TJ (C) Thermal resistance junction to ambient RqJA (C/W) These four are related by the equation TJ + TA ) PD RQJA (1) A heat sink effectively increases the surface area of the package to improve the flow of heat away from the IC and into the surrounding air. Each material in the heat flow path between the IC and the outside environment has a thermal resistance. Like series electrical resistances, these resistances are summed to determine RqJA, the total thermal resistance between the junction and the surrounding air. 1. Thermal Resistance of the junction to case, RqJC (C/W) 2. Thermal Resistance of the case to Heat Sink, RqCS (C/W) 3. Thermal Resistance of the Heat Sink to the ambient air, RqSA (C/W) These are connected by the equation: RQJA + RQJC ) RQCS ) RQSA (3) The maximum ambient temperature and the power dissipation are determined by the design while the maximum junction temperature and the thermal resistance depend on the manufacturer and the package type. The maximum power dissipation for a regulator is: PD(max) + {VIN(max) * VOUT(min)}IOUT(max) ) VIN(max)IQ (2) where: VIN(max) is the maximum input voltage, VOUT(min) is the minimum output voltage, IOUT(max) is the maximum output current, for the application IQ is the maximum quiescent current at IOUT(max). The value for RqJA is calculated using equation (3) and the result can be substituted in equation (1). The value for RqJC is 3.5C/W for a given package type based on an average die size. For a high current regulator such as the CS5205-x the majority of the heat is generated in the power transistor section. The value for RqSA depends on the heat sink type, while RqCS depends on factors such as package type, heat sink interface (is an insulator and thermal grease used?), and the contact area between the heat sink and the package. Once these calculations are complete, the maximum permissible value of RqJA can be calculated and the proper heat sink selected. For further discussion on heat sink selection, see application note "Thermal Management," document number AND8036/D, available through the Literature Distribution Center or via our website at http://onsemi.com. ORDERING INFORMATION Orderable Part Number CS5205-1GT3 CS5205-1GDP3 CS5205-1GDPR3 CS5205-3GT3 CS5205-3GDP3 CS5205-3GDPR3 CS5205-5GT3 Type 5.0 A, Adj. Output 5.0 A, Adj. Output 5.0 A, Adj. Output 5.0 A, 3.3 V Output 5.0 A, 3.3 V Output 5.0 A, 3.3 V Output 5.0 A, 5.0 V Output Package TO-220-3, STRAIGHT D2PAK-3 D2PAK-3 TO-220-3, STRAIGHT D2PAK-3 D2PAK-3 TO-220-3, STRAIGHT Shipping 50 Units / Rail 50 Units / Rail 750 / Tape & Reel 50 Units / Rail 50 Units / Rail 750 / Tape & Reel 50 Units / Rail For information on tape and reel specifications, including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Brochure, BRD8011/D. http://onsemi.com 7 CS5205-1, CS5205-3, CS5205-5 PACKAGE DIMENSIONS TO-220-3 T SUFFIX CASE 221A-08 ISSUE AA -T- -B- F C SEATING PLANE NOTES: 1. DIMENSIONING AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. DIM A B C D F G H J K L N Q R S T U V INCHES MIN MAX 0.560 0.625 0.380 0.420 0.140 0.190 0.025 0.035 0.139 0.155 0.100 BSC --- 0.280 0.012 0.045 0.500 0.580 0.045 0.060 0.200 BSC 0.100 0.135 0.080 0.115 0.020 0.055 0.235 0.255 0.000 0.050 0.045 --- MILLIMETERS MIN MAX 14.23 15.87 9.66 10.66 3.56 4.82 0.64 0.89 3.53 3.93 2.54 BSC --- 7.11 0.31 1.14 12.70 14.73 1.15 1.52 5.08 BSC 2.54 3.42 2.04 2.92 0.51 1.39 5.97 6.47 0.00 1.27 1.15 --- T S 4 Q 123 A U K H -Y- L V G D 3 PL 0.25 (0.010) N M R J B M Y http://onsemi.com 8 CS5205-1, CS5205-3, CS5205-5 PACKAGE DIMENSIONS D2PAK-3 DP SUFFIX CASE 418AB-01 ISSUE O For D2PAK Outline and Dimensions - Contact Factory PACKAGE THERMAL DATA Parameter RqJC RqJA Typical Typical TO-220-3 1.6 50 D2PAK-3 1.6 10-50* Unit C/W C/W *Depending on thermal properties of substrate. RqJA = RqJC + RqCA http://onsemi.com 9 CS5205-1, CS5205-3, CS5205-5 ON Semiconductor and are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability, including without limitation special, consequential or incidental damages. "Typical" parameters which may be provided in SCILLC data sheets and/or specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including "Typicals" must be validated for each customer application by customer's technical experts. SCILLC does not convey any license under its patent rights nor the rights of others. SCILLC products are not designed, intended, or authorized for use as components in systems intended for surgical implant into the body, or other applications intended to support or sustain life, or for any other application in which the failure of the SCILLC product could create a situation where personal injury or death may occur. Should Buyer purchase or use SCILLC products for any such unintended or unauthorized application, Buyer shall indemnify and hold SCILLC and its officers, employees, subsidiaries, affiliates, and distributors harmless against all claims, costs, damages, and expenses, and reasonable attorney fees arising out of, directly or indirectly, any claim of personal injury or death associated with such unintended or unauthorized use, even if such claim alleges that SCILLC was negligent regarding the design or manufacture of the part. SCILLC is an Equal Opportunity/Affirmative Action Employer. This literature is subject to all applicable copyright laws and is not for resale in any manner. PUBLICATION ORDERING INFORMATION LITERATURE FULFILLMENT: Literature Distribution Center for ON Semiconductor P.O. Box 5163, Denver, Colorado 80217 USA Phone: 303-675-2175 or 800-344-3860 Toll Free USA/Canada Fax: 303-675-2176 or 800-344-3867 Toll Free USA/Canada Email: orderlit@onsemi.com N. American Technical Support: 800-282-9855 Toll Free USA/Canada Japan: ON Semiconductor, Japan Customer Focus Center 2-9-1 Kamimeguro, Meguro-ku, Tokyo, Japan 153-0051 Phone: 81-3-5773-3850 ON Semiconductor Website: http://onsemi.com Order Literature: http://www.onsemi.com/litorder For additional information, please contact your local Sales Representative. http://onsemi.com 10 CS5205-1/D |
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