CS5207-1 CHERRY

Document overview

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Technical content

Features

n Output Trimmed to ±1.5% n Dropout Voltage 1.4V @ 7A n Fast Transient Response n Fault Protection Circuitry Thermal Shutdown Overcurrent Protection Safe Area Protection n 3.3V Fixed Version Available Package Options 3L TO-220 Tab (VOUT) CS5207-1 7A Adjustable Linear Regulator CS5207-1 The CS5207-1 linear regulator pro- vides 7A at adjustable voltages with an accuracy of ±1.5%. Two external resistors are used to set the output voltage within a 1.25V to 13V range. The regulator is intended for use as post regulator and microprocessor supply. The fast loop response and low dropout voltage make this reg- ulator 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 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 regulator is available in a TO-220 package. A 3.3V, fixed ver- sion is also available. Please consult factory for more information. Block Diagram

1 Adj

Description

A 3.3V fixed version is also available. *Consult factory. 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. 7/8/97

Lead Temperature Soldering 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 = 7A. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT Package Pin Description PACKAGE PIN # PIN SYMBOL FUNCTION n Adjustable Output Voltage Reference Voltage V INÐVOUT=1.6V; VAdj = 0V 1.235 1.254 1.272 V (Notes 1 and 2) 10mA²I OUT²7A (-1.5%) (+1.5%) Line Regulation 1.6V²V INÐVOUT²6V; IOUT=10mA 0.04 0.20 % Load Regulation V INÐVOUT=1.6V; 0.13 0.5 % (Notes 1 and 2) 10mA²I OUT²7A Dropout Voltage (Note 3) I OUT=7A 1.4 1.55 V Current Limit V INÐVOUT=3V; TJ ³ 25¡C 7.1 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 1.6V²V INÐVOUT²4V; 0.2 5.0 µA 10mA²IOUT²7A Thermal Regulation 30ms pulse; T A=25¡C 0.003 %W Ripple Rejection f=120Hz; C Adj=25µF; IOUT=7A 80 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. 3L TO-220 1 Adj Adjust pin (low side of the internal reference). OUT Regulated output voltage (case). 3V IN Input voltage.

0.025 0.000 0.050 0.075 0.100 0.200 Output Voltage Deviation (%) 01 2 34 5 Output Current (A) TCASE = 0°C 0.125 0.150 0.175 TCASE = 125°C TCASE = 25°C 012 34 56 Dropout Voltage (V) Output Current (A) 0.85 0.70 0.80 0.90 0.95 1.00 1.05 1.10 1.15 1.20 1.25 1.30 1.35 TCASE = 0°C TCASE = 125°C 0.75 1.40 1.45 1.50 1.55 TCASE = 25°C CS5207 -1 Typical Performance Characteristics 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 Dropout Voltage vs. Output Current Reference Voltage vs. Temperature Load Regulation vs. Output Current 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 = 7A (VIN Ð VOUT) = 3V VRIPPLE = 1.6VPP CAdj = 25mF Ripple Rejection vs. Frequency

Figure 3. Grounding scheme for the adjustable output regulator to min- and safe operating area circuitry to protect the device. ensure that an adequate heat sink is used.

  1. Maximum Ambient Temperature T
  2. Power dissipation PD (Watts)
  3. Maximum junction temperature TJ (¡C)
  4. 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.

  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,

result can be substituted in equation (1).

Part Number Type Description CS5207-1GT3 7A, adj. output 3 L TO-220 Straight CS5207-3GT3 7A, fixed output 3L TO-220 Straight

Ordering Information

Rev. 7/8/97 CS5207 -1 Package Specification PACKAGE DIMENSIONS IN mm(INCHES) Thermal Data 3L TO-220 RQJC typ 1.6 ûC/W RQJA typ 50 ûC/W 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)