CS5205A-1 CHERRY
Document overview
- Manufacturer or author: Provided By www.digicamel.com(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 6
Technical content
Features
n Output Trimmed to +/- 1% n Dropout Voltage 1.15V @ 5A n Fast Transient Response n Fault Protection Circuitry Thermal Shutdown Overcurrent Protection Safe Area Protection Package Options 3L TO-220 Tab (VOUT) CS5205A-1 5A Adjustable Linear Regulator CS5205A-1 The CS5205A-1 linear regulator provides 5A at an adjustable volt- age with an accuracy of ±1%. Two external resistors are used to set the output voltage within a 1.25V to 13V range. The regulator is intended for use as a post regulator and microproces- sor supply. The fast loop response and low dropout voltage make this regulator ideal for applications where low voltage operation and good transient response are impor- tant. 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 regulator is fully protected against overload conditions with protection circuitry for Safe Operating Area (SOA), overcurrent and thermal shutdown. The CS5205A-1 is pin compatible with the LT1084 family of linear regulators but has lower dropout voltage. The regulator is available in TO-220 and surface mount D 2 packages. Block Diagram
1 Adj
Description
Rev. 7/8/97 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 ¨
PACKAGE PIN # PIN SYMBOL FUNCTION 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 Absolute Maximum Ratings Lead Temperature Soldering n Adjustable Output Voltage 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; TJ ³ 25¡C 1.15 1.25 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 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. D2PAK 3L TO-220 1 1 Adj Adjust pin (low side of the internal reference). 22 V OUT Regulated output voltage (case). 33 V IN Input voltage.
Typical Performance Characteristics Dropout Voltage vs. Output Current Reference Voltage vs. Temperature 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 (%) 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 Load Regulation vs. Output Current 0.85 0.70 0.90 0.95 1.00 1.10 1.15 1.20 1.25 TCASE = 0°C TCASE = 125°C TCASE = 25°C 0.75 Dropout Voltage (V) Output Current (A) 012345 1.05 0.80 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 0.0 101 Frequency (Hz) Ripple Rejection (dB) 10.0 20.0 30.0 40.0 50.0 60.0 70.0 80.0 90.0 100.0 102 103 104 105 TCASE = 25°C IOUT = 5A (VIN Ð VOUT) = 3V VRIPPLE = 1.6VPP CAdj = 25mF Ripple Rejection vs. Frequency
Figure 3. Grounding scheme for the adjustable output regulator to min- accurately to ensure that an adequate heat sink is used.
- Maximum Ambient Temperature T
- Power dissipation PD (Watts)
- Maximum junction temperature TJ (¡C)
- Thermal resistance junction to ambient RQJA (C/W)
on the manufacturer and the package type. IQ is the maximum quiescent current at IOUT(max). junction and the surrounding air.
- Thermal Resistance of the junction to case, RQJC (¡C/W)
- Thermal Resistance of the case to Heat Sink, RQCS (¡C/W)
- Thermal Resistance of the Heat Sink to the ambient air,
result can be substituted in equation (1). of the heat is generated in the power transistor section. the contact area between the heat sink and the package.
Part Number Type Description CS5205A-1GT3 5A, adj. output 3L TO-220 Straight CS5205A-1GDP3 5A, adj. output 3L D 2PAK CS5205A-1GDPR3 5A, adj. output 3L D 2PAK (tape & reel)
Ordering Information
Rev. 7/8/97 CS5205A-1 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 © 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 20° typ 10.31 (.406) 10.05 (.396) 15.75 (.620) 14.73 (.580) 8.53 (.336) 8.28 (.326) 0.91 (.036) 0.66 (.026) EÐPIN 1.40 (.055) 1.14 (.045) B 0.10(.004) 0.00(.000) 2.79 (.110) 2.29 (.090) B A C 4.57 (.180) 4.31 (.170) (Both Sides) 1.88 (.066) 1.40 (.055) 2.74(.108) 2.49(.098) 1.40 (.055) 1.14 (.045)