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| Back CS8391 5.0 V/250 mA, 5.0 V/100 mA Micropower Low Dropout Regulator with ENABLE The CS8391 is a precision, dual 5.0 V micropower linear voltage regulator. The switched primary output (VOUT1) supplies up to 250 mA while the secondary (VOUT2) is capable of supplying 100 mA. Both outputs have a maximum dropout voltage of 600 mV and low reverse current. Quiescent current drain is typically 150 A when supplying 100 A from each output. The ENABLE input provides logic level control of the primary output. With the primary output disabled, quiescent current drain is typically 100 A when supplying 100 A from the secondary output. The CS8391 is extremely robust with protection provided for reverse battery, short circuit, and overtemperature on both outputs. The CS8391 is available in a 5-lead D2PAK. Features * 5.0 V/250 mA Primary Output * 5.0 V/100 mA Secondary Output * 3.0% Tolerance, Both Outputs * ON/OFF Control for Primary Output * Low Quiescent Current Drain (100 A VOUT2) * Low Reverse Current * Protection Features - Reverse Battery (-15 V) - Short Circuit - Overtemperature http://onsemi.com 1 5 D2PAK 5-PIN DP SUFFIX CASE 936F PIN CONNECTIONS AND MARKING DIAGRAM Tab = GND Pin 1. VIN 2. VOUT1 3. GND 4. VOUT2 5. ENABLE CS8391 AWLYWW 1 A WL, L YY, Y WW, W = Assembly Location = Wafer Lot = Year = Work Week ORDERING INFORMATION* Device CS8391YDP5 CS8391YDPR5 Package D2PAK, 5-PIN D2PAK, 5-PIN Shipping 50 Units/Rail 750 Tape & Reel *Consult your local sales representative for SO-8, SO-16, DIP-8, DIP-16, TO-220 FIVE LEAD, and D2PAK 7-PIN packaging options. (c) Semiconductor Components Industries, LLC, 2001 1 February, 2001 - Rev. 3 Publication Order Number: CS8391/D CS8391 Primary Output VIN * ENABLE + - 1.2 V + - Current Limit VOUT1 (250 mA) VOUT1SENSE Bandgap Reference *Note: Internally connected on 5 leaded package. Thermal Shutdown Secondary Output VOUT2 (100 mA) * Current Limit + - VOUT2SENSE GND Figure 1. Block Diagram ABSOLUTE MAXIMUM RATINGS* Rating Input Voltage Power Dissipation Operating Temperature Range Maximum Junction Temperature Storage Temperature Range Electrostatic Discharge (Human Body Model) 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 -15 to 45 Internally Limited -40 to +125 -40 to +150 -55 to +150 4.0 260 peak 230 peak Unit V - C C C kV C C http://onsemi.com 2 CS8391 ELECTRICAL CHARACTERISTICS: (6.0 V VIN 26 V, IOUT1 = IOUT2 = 100 A, -40C TC 125C, -40C TJ 150C; unless otherwise specified.) Characteristic Primary Output Stage (VOUT1) Output Voltage, VOUT1 Dropout Voltage Line Regulation Load Regulation Quiescent Current Ripple Rejection Current Limit Short Circuit Current Limit Reverse Current Secondary Output (VOUT2) Output Voltage, (VOUT2) Dropout Voltage Line Regulation Load Regulation Quiescent Current Ripple Rejection Current Limit Short Circuit Current Limit Reverse Current ENABLE Function (ENABLE) Input Threshold Input Bias Current Protection Circuits Overtemperature Threshold 3. Guaranteed by design. Note 3. 150 180 - C ENABLE = LOW, 7.0 V VIN 26 V ENABLE = HIGH, 7.0 V VIN 26 V 0 V VENABLE 5.0 V - 2.0 -2.0 1.2 1.2 0 0.8 - 2.0 V V A 100 A IOUT1 100 mA IOUT2 = 100 mA IOUT2 = 100 A 6.0 V VIN 26 V 100 A IOUT2 100 mA, VIN = 14 V ENABLE = LOW, VIN = 12.8 V ENABLE = HIGH, VIN = 16 V, IOUT2 = 100 mA f = 120 Hz; IOUT2 = 50 mA, 7.0 V VIN 17 V - VOUT2 = 0 V, VIN = 16 V, IOUT1 = 0 A VOUT2 = 5.0 V, VIN = 0 V 4.85 - - - - - 60 105 25 - 5.00 400 100 5.0 5.0 100 8.0 70 200 - 100 5.15 600 150 50 50 150 25 - - - 250 V mV mV mV mV A mA dB mA mA A VOUT1 = 0 V, VIN = 16 V VOUT1 = 5.0 V, VIN = 0 V 100 A IOUT1 250 mA IOUT1 = 250 mA IOUT1 = 100 A 6.0 V VIN 26 V 1.0 mA IOUT1 250 mA, VIN = 14 V ENABLE = HIGH, VIN = 16V, IOUT1 = 250 mA f = 120 Hz, IOUT1 = 125 mA, 7.0 V VIN 17 V - 4.85 - - - - - 60 260 25 - 5.00 400 100 5.0 5.0 22 70 400 - 100 5.15 600 150 50 50 50 - - - 1500 V mV mV mV mV mA dB mA mA A Test Conditions Min Typ Max Unit PACKAGE PIN DESCRIPTION PACKAGE LEAD # D2PAK, 5-PIN 1 2 3 4 5 LEAD SYMBOL VIN VOUT1 GND VOUT2 ENABLE FUNCTION Supply voltage to IC, usually direct from battery. 5.0 V regulated output which is activated by ENABLE input. Ground connection. Standby output 5.0 V, 100 mA capability; always on. CMOS compatible input lead; switches VOUT1. When ENABLE is high, VOUT1 is active. http://onsemi.com 3 CS8391 DEFINITION OF TERMS Current Limit - Peak current that can be delivered to the output. Dropout Voltage - The input-output voltage differential at which the circuit ceases to regulate against further reduction in input voltage. Measured when the output voltage has dropped 100 mV from the nominal value obtained at 14 V input, dropout voltage is dependent upon load current and junction temperature. Input Output Differential - The voltage difference between the unregulated input voltage and the regulated output voltage for which the regulator will operate. Input Voltage - The DC voltage applied to the input terminals with respect to ground. Line Regulation - The change in output voltage for a change in the input voltage. The measurement is made under conditions of low dissipation or by using pulse techniques such that the average chip temperature is not significantly affected. 45 V VIN 14 V 3.0 V 26 V Load Regulation - The change in output voltage for a change in load current at constant chip temperature. Long Term Stability - Output voltage stability under accelerated life-test conditions after 1000 hours with maximum rated voltage and junction temperature. Quiescent Current - The part of the positive input current that does not contribute to the positive load current, i.e., the regulator ground lead current. Ripple Rejection - The ratio of the peak-to-peak input ripple voltage to the peak-to-peak output ripple voltage. Short Circuit Current Limit - Peak current that can be delivered by the outout when forced to 0 V. Temperature Stability of VOUT - The percentage change in output voltage for a thermal variation from room temperature to either temperature extreme. 14 V ENABLE 2.0 V 0.8 V 0V 5.0 V 5.0 V 2.4 V 5.0 V 0V 5.0 V 0V 5.0 V 0V 5.0 V 5.0 V 0V VOUT1 VOUT2 5.0 V 5.0 V 5.0 V 2.4 V 5.0 V 5.0 V 5.0 V System Condition Turn On Load Dump Low VIN Line Noise, Etc. VOUT1 Short Circuit VOUT2 Short Circuit Thermal Shutdown Turn Off Figure 2. Typical Circuit Waveform APPLICATION NOTES General The CS8391 is a micropower dual 5.0 V regulator. All bias required to operate the internal circuitry is derived from the standby output, VOUT2. If this output experiences an over current situation and collapses, then VOUT1 will also collapse (see Figure 2). If there is critical circuitry that must remain active under most conditions it should be connected to VOUT2. Any circuitry that is likely to be subjected to a short circuit, e.g., circuitry outside the module, should be connected to VOUT1. External Capacitors Output capacitors are required for stability with the CS8391. Without them, the regulator outputs will oscillate. Actual size and type may vary depending upon the application load and temperature range. Capacitor effective series resistance (ESR) is also a factor in the IC stability. Worst-case is determined at the minimum ambient temperature and maximum load expected. Output capacitors can be increased in size to any desired value above the minimum. One possible purpose of this would be to maintain the output voltages during brief conditions of negative input transients that might be characteristic of a particular system. Capacitors must also be rated at all ambient temperatures expected in the system. To maintain regulator stability down to -40C, capacitors rated at that temperature must be used. More information on capacitor selection for SMART REGULATOR(R)s is available in the SMART REGULATOR application note, "Compensation for Linear Regulators," document number SR003AN/D, available through the Literature Distribution Center or via our website at http://www.onsemi.com. http://onsemi.com 4 CS8391 ENABLE The ENABLE function controls VOUT1. When ENABLE is high, VOUT1 is on. When ENABLE is low, VOUT1 is off. Calculating Power Dissipation in a Dual Output Linear Regulator IIN VIN SMART REGULATOR IOUT1 VOUT1 The maximum power dissipation for a dual output regulator (Figure 3) is PD(max) + VIN(max) * VOUT1(min) IOUT1(max) ) VIN(max) * VOUT2(min) IOUT2(max) ) VIN(max)IQ (1) Control Features IOUT2 VOUT2 IQ where: VIN(max) is the maximum input voltage, VOUT1(min) is the minimum output voltage from VOUT1, VOUT2(min) is the minimum output voltage from VOUT2, IOUT1(max) is the maximum output current, for the application, IOUT2(max) is the maximum output current, for the application, and IQ is the quiescent current the regulator consumes at both IOUT1(max) and IOUT2(max). Once the value of PD(max) is known, the maximum permissible value of RJA can be calculated: 150C * TA RQJA + PD (2) Figure 3. Dual Output Regulator With Key Performance Parameters Labeled. Heat Sinks 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 will have a thermal resistance. Like series electrical resistances, these resistances are summed to determine the value of RJA: RQJA + RQJC ) RQCS ) RQSA (3) The value of RJA can be compared with those in the package section of the data sheet. Those packages with RJA's less than the calculated value in equation 2 will keep the die temperature below 150C. In some cases, none of the packages will be sufficient to dissipate the heat generated by the IC, and an external heat sink will be required. where: RJC = the junction-to-case thermal resistance, RCS = the case-to-heat sink thermal resistance, and RSA = the heat sink-to-ambient thermal resistance. RJC appears in the package section of the data sheet. Like RJA, it too is a function of package type. RCS and RSA are functions of the package type, heatsink and the interface between them. These values appear in heat sink data sheets of heat sink manufacturers. VIN 0.1 F VBATT VOUT1 22 F ESR < 8 Load GND C3** C1 * CS8391 VOUT2 C2** 22 F ESR < 8 VCC mP ENABLE I/O GND * C1 required if regulator is located far from power supply filter. ** C2 and C3 required for stability. Capacitor must operate at minimum temperature expected during system operations. Figure 4. Test & Application Circuit http://onsemi.com 5 CS8391 PACKAGE DIMENSIONS D2PAK, FIVE PIN DP SUFFIX CASE 936F-01 ISSUE O -T- SEATING PLANE B M C E NOTES: 1. DIMENSIONS AND TOLERANCING PER ANSI Y14.5M, 1982. 2. CONTROLLING DIMENSION: INCH. 3. TAB CONTOUR OPTIONAL WITHIN DIMENSIONS B AND M. 4. DIMENSIONS A AND B DO NOT INCLUDE MOLD FLASH OR GATE PROTRUSIONS. MOLD FLASH AND GATE PROTRUSIONS NOT TO EXCEED 0.025 (0.635) MAX. DIM A B C D E F G H J K M N INCHES MIN MAX 0.326 0.336 0.396 0.406 0.170 0.180 0.026 0.035 0.045 0.055 0.090 0.110 0.067 BSC 0.098 0.108 0.018 0.025 0.204 0.214 0.055 0.066 0.000 0.004 MILLIMETERS MIN MAX 8.28 8.53 10.05 10.31 4.31 4.57 0.66 0.91 1.14 1.40 2.29 2.79 1.70 BSC 2.49 2.74 0.46 0.64 5.18 5.44 1.40 1.68 0.00 0.10 A 12345 K F G D 5 PL M H M 0.13 (0.005) TB J N PACKAGE THERMAL DATA Parameter RJC RJA Typical Typical D2PAK, 5-PIN 2.4 10-50* Unit C/W C/W * Depending on thermal properties of substrate. RJA = RJC + RCA http://onsemi.com 6 CS8391 Notes http://onsemi.com 7 CS8391 SMART REGULATOR is a registered trademark of Semiconductor Components Industries, LLC (SCILLIC). ON Semiconductor and are 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. PUBLICATION ORDERING INFORMATION NORTH AMERICA 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: ONlit@hibbertco.com Fax Response Line: 303-675-2167 or 800-344-3810 Toll Free USA/Canada N. American Technical Support: 800-282-9855 Toll Free USA/Canada EUROPE: LDC for ON Semiconductor - European Support German Phone: (+1) 303-308-7140 (Mon-Fri 2:30pm to 7:00pm CET) Email: ONlit-german@hibbertco.com French Phone: (+1) 303-308-7141 (Mon-Fri 2:00pm to 7:00pm CET) Email: ONlit-french@hibbertco.com English Phone: (+1) 303-308-7142 (Mon-Fri 12:00pm to 5:00pm GMT) Email: ONlit@hibbertco.com EUROPEAN TOLL-FREE ACCESS*: 00-800-4422-3781 *Available from Germany, France, Italy, UK, Ireland CENTRAL/SOUTH AMERICA: Spanish Phone: 303-308-7143 (Mon-Fri 8:00am to 5:00pm MST) Email: ONlit-spanish@hibbertco.com ASIA/PACIFIC: LDC for ON Semiconductor - Asia Support Phone: 303-675-2121 (Tue-Fri 9:00am to 1:00pm, Hong Kong Time) Toll Free from Hong Kong & Singapore: 001-800-4422-3781 Email: ONlit-asia@hibbertco.com JAPAN: ON Semiconductor, Japan Customer Focus Center 4-32-1 Nishi-Gotanda, Shinagawa-ku, Tokyo, Japan 141-0031 Phone: 81-3-5740-2745 Email: r14525@onsemi.com ON Semiconductor Website: http://onsemi.com For additional information, please contact your local Sales Representative. http://onsemi.com 8 CS8391/D |
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