CS5205-1 CHERRY | Alldatasheet

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Technical content

Features

n Output Trimmed to +/- 1% n Dropout Voltage 1.2V @ 5A n Fast Transient Response n Fault Protection Circuitry Thermal Shutdown Overcurrent Protection Safe Area Protection Package Options 3L TO-220 Tab (VOUT) CS5205-1,-3,-5 5A Adjustable, and 3.3V and 5V Fixed Linear Regulators CS5205- 1,-3,-5 The CS5205-X series of linear regu- lators provides 5A at adjustable and fixed voltages with an accura- cy of ±1% and ±2% respectively. The adjustable version uses two external resistors to set the output voltage within a 1.25V to 13V range. The regulators are intended for use as post regulators and microproces- sor supplies. The fast loop response and low dropout voltage make these regulators ideal for applica- tions where low voltage operation and good transient response are important. The circuit is designed to operate with dropout voltages as low as 1V depending on the output current level. The maximum quiescent cur- rent is only 10mA 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 and surface mount D 2 packages. Block Diagram CS5205-3, -5

1 Gnd

1 Adj

CS5205-3, -5

Description

Cherry Semiconductor Corporation

2000 South County Trail, East Greenwich, RI 02818

Tel: (401)885-3600 Fax: (401)885-5786 Email: info@cherry-semi.com Web Site: www.cherry-semi.com A Company ¨ Rev. 6/12/97

CS5205-1,-3,-5 Absolute Maximum Ratings Electrical Characteristics: CIN = 10µF, COUT = 22µF Tantalum, VIN Ð VOUT=3V, VIN ² 15V, 0¡C ² TA ² 70¡C, TJ ² +150¡C, unless otherwise specified, Ifull load = 5A. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Electrical Characteristics: CIN = 10µF, COUT = 22µF Tantalum, VIN Ð VOUT=3V, VIN ² 10V, 0¡C ² TA ² 70¡C, TJ ² +150¡C, unless otherwise specified, Ifull load = 5A. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT n Fixed Output Voltage (CS5205-3, -5) CS5205-5 V INÐVOUT=1.5V; 4.9 5.0 5.1 V (Notes 1 and 2) 0²I OU T²5A (-2%) (+2%) CS5205-3 V INÐVOUT=1.5V; 3.234 3.300 3.366 V (Notes 1 and 2) 0²I OUT²5A (-2%) (+2%) Line Regulation 1.5V²V INÐVOUT ² 6V; IOUT=10mA 0.04 0.20 % Load Regulation V INÐVOUT =1.5V; 0.08 0.40 % (Notes 1 and 2) 10mA ² I OUT²5A Dropout Voltage (Note 3) I OUT=5A 1.2 1.3 V Current Limit V INÐVOUT=3V; TJ ³ 25¡C 5.5 8.5 A VINÐVOUT=9V 1.0 A Quiescent Current V IN²9V; IOUT = 10mA 5.0 10.0 mA Thermal Regulation 30ms pulse; T A=25¡C 0.003 %/W Ripple Rejection f=120Hz; I OUT=5A 75 dB Temperature Stability 0.5 % n Adjustable Output Voltage (CS5205-1) Reference Voltage V INÐVOUT=1.5V; VAdj = 0V 1.241 1.254 1.266 V (Notes 1 and 2) 10mA²I OUT²5A (-1%) (+1%) Line Regulation 1.5V²V INÐVOUT²6V; IOUT=10mA 0.04 0.20 % Load Regulation V INÐVOUT=1.5V; 0.08 0.4 % (Notes 1 and 2) 10mA²I OUT²5A Dropout Voltage (Note 3) I OUT=5A 1.2 1.3 V Current Limit V INÐVOUT=3V; TJ ³ 25¡C 5.5 8.5 A VINÐVOUT=9V 1.0 A Minimum Load Current V INÐVOUT=7V 1.2 6 mA Adjust Pin Current 50 100 µA Adjust Pin Current Change 1.5V²V INÐVOUT²4V; 0.2 5.0 µA 10mA²IOUT²5A Thermal Regulation 30ms pulse; T A=25¡C 0.003 %W Ripple Rejection f=120Hz; C Adj=25µF; IOUT=5A 82 dB Temperature Stability 0.5 % RMS Output Noise 10Hz²f²10kHz; T A=25¡C 0.003 %V OUT Thermal Shutdown 150 180 ¡C Thermal Shutdown Hysteresis 25 ¡C

CS5205-1,-3,-5 Package Pin Description PACKAGE PIN # PIN SYMBOL FUNCTION Typical Performance Characteristics 0.85 0.70 0.80 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 0.75 Dropout Voltage (V) Output Current (A) 012345 TCASE = 0°C TCASE = 125°C TCASE = 25°C 0 10 130 -0.12 0.10 Output Voltage Deviation (%) TJ (°C) 20 30 40 50 60 70 80 90 100 110 120 0.08 0.06 0.04 0.02 0.00 -0.02 -0.04 -0.06 -0.08 -0.10 0.025 0.000 0.050 0.075 0.100 0.200 01 2 34 5 Output Current (A) TCASE = 0°C 0.125 0.150 0.175 TCASE = 125°C TCASE = 25°C Output Voltage Deviation (%) Dropout Voltage vs. Output Current Reference Voltage vs. Temperature Load Regulation vs. Output Current PARAMETER TEST CONDITIONS MIN TYP MAX UNIT n Fixed Output Voltage (CS5205-3, -5): continued RMS Output Noise (%VOUT) 10Hz²f²10kHz 0.003 %V OUT Thermal Shutdown 150 180 ¡C Thermal Shutdown Hysteresis 25 ¡C Note 1: Load regulation and output voltage are measured at a constant junction temperature by low duty cycle pulse testing. Changes in out- put voltage due to thermal gradients or temperature changes must be taken into account separately. Note 2: Specifications apply for an external Kelvin sense connection at a point on the output pin 1/4Ó from the bottom of the package. Note 3: Dropout voltage is a measurement of the minimum input/output differential at full load. Electrical Characteristics: CIN = 10µF, COUT = 22µF Tantalum, VIN Ð VOUT=3V, VIN ² 10V, 0¡C ² TA ² 70¡C, TJ ² +150¡C, unless otherwise specified, Ifull load = 5A. CS5205 -1 CS5205 -3, -5 D2PAK 3L TO-220 D 2PAK 3L TO-220 1 1 N/A N/A Adj Adjust pin (low side of the internal reference). 22 2 2 V OUT Regulated output voltage (case). 33 3 3 V IN Input voltage. N/A N/A 1 1 Gnd Ground connection. 123456 0.550 Minimum Load Current (mA) VIN – VOUT (V) TCASE = 0°C TCASE = 125°C 0.875 1.200 1.525 1.850 2.175 2.500 8 9 TCASE = 25°C Minimum Load Current

Stability Considerations section. Figure 1. Resistor divider scheme for the adjustable version.

Applications Information: continued The CS5205-X series of linear regulators includes thermal shutdown and safe operating area circuitry to protect the device. High power regulators such as these usually oper- ate at high junction temperatures so it is important to cal- culate the power dissipation and junction temperatures accurately to ensure that an adequate heat sink is used. The case is connected to V OUT on the CS5205-X, electrical isolation may be required for some applications. Thermal compound should always be used with high current regu- lators such as these. The thermal characteristics of an IC depend on the follow- ing four factors: 1. Maximum Ambient Temperature T A (¡C) 2. Power dissipation PD (Watts) 3. Maximum junction temperature TJ (¡C) 4. Thermal resistance junction to ambient RQJA (C/W) These four are related by the equation TJ = TA + PD ´ RQJA (1) The maximum ambient temperature and the power dissi- pation 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: P D(max)={VIN(max)ÐVOUT(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). 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 R QJA, 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 value for RQJA is calculated using equation (3) and the result can be substituted in equation (1). The value for RQJC is normally quoted as a single figure 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 R QSA depends on the heat sink type, while RQCS depends on factors such as package type, heat sink inter- face (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 R QJA can be calculated and the proper heat sink selected. For further discussion on heat sink selection, see application note ÒThermal Management for Linear Regulators.Ó Calculating Power Dissipation and Heat Sink Requirements CS5205-1,-3,-5

Part Number Type Description CS5205-1GT3 5A, adj. output 3 L TO-220 Straight CS5205-1GDP3 5A, adj. output 3 L D 2PAK CS5205-1GDPR3 5A, adj. output 3 L D 2PAK (tape & reel) CS5205-3GT3 5A, 3.3V output 3 L TO-220 Straight CS5205-3GDP3 5A, 3.3V output 3 L D 2PAK CS5205-3GDPR3 5A, 3.3V output 3 L D 2PAK (tape & reel) CS5205-5GT3 5A, 5V output 3 L TO-220 Straight

Ordering Information

Rev. 6/12/97 Package Specification PACKAGE DIMENSIONS IN mm(INCHES) Thermal Data 3L 3L TO-220 D 2PAK RQJC typ 1.6 1.6 ûC/W RQJA typ 50 10 - 50* ûC/W *Depending on thermal properties of substrate.RQJA = RQJC + RQCA PACKAGE THERMAL DATA CS5205-1,-3,-5 © 1999 Cherry Semiconductor Corporation Cherry Semiconductor Corporation reserves the right to make changes to the specifications without notice. Please contact Cherry Semiconductor Corporation for the latest available information.

3 Lead TO-220 (T) Straight

5.33 (.210) 4.83 (.190) 2.79 (.110) 2.29 (.090) 1.02 (.040) 0.63 (.025) 0.56 (.022) 0.38 (.014) 1.40 (.055) 1.14 (.045) 4.83 (.190) 4.06 (.160) 6.17 (.243) REF 1.14 (.045) 1.52 (.060) 1.14 (.045) 1.40 (.055) 2.87 (.113) 5.94 (.234) 14.22 (.560) 13.72 (.540) 2.92 (.115) 2.29 (.090) 9.78 (.385) 10.54 (.415) 3.71 (.146) 3.96 (.156) 14.99 (.590) 14.22 (.560)

3 Lead D2PAK (DP)

2.54 (.100) REF 10.31 (.406) 10.05 (.396) 8.53 (.336) 8.28 (.326) 0.91 (.036) 0.66 (.026) 1.40 (.055) 1.14 (.045) 4.57 (.180) 4.31 (.170) 1.68 (.066) 1.40 (.055) 2.74(.108) 2.49(.098) 1.40 (.055) 1.14 (.045) 0.10 (.004) 0.00 (.000) .254 (.010) REF 15.75 (.620) 14.73 (.580) 2.79 (.110) 2.29 (.090)