CYStech Electronics Corp. Spec. No. : C538E3 Issued Date : 2003.04.08 Revised Date : Page No. : 1/4 3-TERMINAL NEGATIVE VOLTAGE REGULATOR PL7918XE3 Description The PL7918XE3 series of three-terminal negative regulators are available in the TO-220AB package. These regulators can provide TO-220AB local on-card regulation, eliminating the distribution problems associated with single point regulation. Each employs internal current limiting, thermal shutdown and safe operating area protection, making it essentially indestructible. If adequate heat sinking is provided, they can deliver over 1A output current. Although designed primarily as fixed voltage regulators, these devices can be used with external components to obtain adjustable voltages and currents. PL7918XE3 is characterized for operation from 0°C to +125°C, and if operating temperature is always high, please refer to the power dissipation curve. Absolute Maximum Ratings (Ta=25°C) • Input Voltage ...................................................................................................................... -35 V • Total Power Dissipation .................................................................................... Internally limited • Operating Junction Temperature ....................................................................... 0 °C to +125 °C • Maximum Junction Temperature ..................................................................................... 125 °C • Storage Temperature Range .......................................................................... -55 °C to +150 °C • Lead Temperature (Soldering 10S) ................................................................................. 230 °C Typical Application Schematic Diagram GND 1.4k Vin 2 PL7918 3 Vout 4K 5K 7K 1 15K C1 C2 Vout 3K 6.2V 10K 20pF Note: Bypass Capacitors are recommended for optimum stability and transient response and should be located as close as possible to the regulator. PL7918E3 750 Vin 1K 6K 20K 20K 20K 10pF 600 5K 15K 20K 150 0.2 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C538E3 Issued Date : 2003.04.08 Revised Date : Page No. : 2/4 Electrical Characteristics Vin=-27V, Io=500mA, Cin=2.2uF, Cout=1uF, 0°C≤Tj≤125°C (unless otherwise noted) Symbol Parameter Vo Output Voltage ∆Vo Line Regulation ∆Vo Load Regulation IQ ∆IQ ∆Vo / ∆T Vn RR VD Isc Ipk Symbol Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Output Current Parameter Vo Output Voltage ∆Vo Line Regulation ∆Vo Load Regulation IQ ∆IQ ∆Vo / ∆T Vn RR VD Isc Ipk PL7918E3 Quiescent Current Quiescent Current Change Output Voltage Drift Output Noise Voltage Ripple Rejection Dropout Voltage Short Circuit Current Peak Output Current Conditions Tj=25°C PD≤15W, 5mA≤ IO≤ 1A -22V≥Vin≥ -33V Tj=25°C, -21V ≥ Vin≥-33V Tj=25°C, -24V≥Vin≥-30V 5mA≤ IO≤1.5A 250mA≤ IO≤750mA IO≤1A, Tj=25°C 5mA≤ IO≤1A -22V≥Vin≥-33V Io=5mA Ta=25°C, 10Hz≤ f ≤100KHz ∆Vi=10V, f=120Hz Tj=25°C, IO=1A Tj=25°C, Vin=-35V Tj=25°C Conditions Tj=25°C PD≤15W, 5mA≤ IO≤ 1A -22V≥Vin≥ -33V Tj=25°C, -21V ≥ Vin≥-33V Tj=25°C, -24V≥Vin≥-30V 5mA≤ IO≤1.5A 250mA≤ IO≤750mA IO≤1A, Tj=25°C 5mA≤ IO≤1A -22V≥Vin≥-33V Io=5mA Ta=25°C, 10Hz≤ f ≤100KHz ∆Vi=10V, f=120Hz Tj=25°C, IO=1A Tj=25°C, Vin=-35V Tj=25°C PL7918A Min Typ Max -17.64 -18 -18.36 -17.46 -18 -18.54 54 1.3 3 -1 300 68 2 2.2 2.2 360 180 360 180 8 0.5 1.0 - PL7918B Min Typ Max -17.28 -18 -18.72 -17.1 -18 -18.9 54 1.3 3 -1 300 68 2 2.2 2.2 360 180 360 180 8 0.5 1.0 - Units V mV mV mA mA mV/°C µV dB V A A Units V mV mV mA mA mV/°C µV dB V A A CYStek Product Specification CYStech Electronics Corp. Spec. No. : C538E3 Issued Date : 2003.04.08 Revised Date : Page No. : 3/4 Characteristic Curves Peak Output Current as A Function of InputOutput Differentail Voltage Average Case Power Dissipation as A Function of Ambient Temperauture 100 2.5 10 Output Current Power Dissipation 2 1 1.5 1 0.5 0 0.1 25 50 75 100 125 0 150 3 6 9 12 15 18 21 24 Ambient Temperature (ºC) Input-Output Voltage Differential Ripple Rejection as A Function of Frequency Ripple Rejection as A Function of Output Voltage 100 27 30 20 22 80 Ripple Rejection (dB) Ripple Rejection (dB) 80 60 40 20 70 60 50 40 0 10 100 1000 10000 100000 Frequency 2 4 6 8 10 12 14 16 18 Output Voltage Output Voltage as A Function of Junction Temperature 6.26 Output Voltage (Volts) 6.22 6.18 6.14 6.1 6.06 -25 0 25 50 75 100 125 175 Junction Temperature (ºC) PL7918E3 CYStek Product Specification CYStech Electronics Corp. Spec. No. : C538E3 Issued Date : 2003.04.08 Revised Date : Page No. : 4/4 TO-220AB Dimension Marking: A B D E C 7918 H K M I 3 G N 2 Style: Pin 1.Gnd 2.Vin 3.Vout 4.Vin 3-Lead TO-220AB Plastic Package CYStek Package Code: E3 1 4 O P *: Typical Inches Min. Max. 0.2197 0.2949 0.3299 0.3504 0.1732 0.185 0.0453 0.0547 0.0138 0.0236 0.3803 0.4047 *0.6398 DIM A B C D E G H Millimeters Min. Max. 5.58 7.49 8.38 8.90 4.40 4.70 1.15 1.39 0.35 0.60 9.66 10.28 *16.25 DIM I K M N O P Inches Min. Max. *0.1508 0.0295 0.0374 0.0449 0.0551 *0.1000 0.5000 0.5618 0.5701 0.6248 Millimeters Min. Max. *3.83 0.75 0.95 1.14 1.40 *2.54 12.70 14.27 14.48 15.87 Notes: 1.Controlling dimension: millimeters. 2.Maximum lead thickness includes lead finish thickness, and minimum lead thickness is the minimum thickness of base material. 3.If there is any question with packing specification or packing method, please contact your local CYStek sales office. Material: • Lead: 42 Alloy ; solder plating • Mold Compound: Epoxy resin family, flammability solid burning class: UL94V-0 Important Notice: • All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of CYStek. • CYStek reserves the right to make changes to its products without notice. • CYStek semiconductor products are not warranted to be suitable for use in Life-Support Applications, or systems. • CYStek assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. PL7918E3 CYStek Product Specification