Spec. No. : C531A3 Issued Date : 2003.04.08 Revised Date : . . Page No. : 1/3 CYStech Electronics Corp. Three Terminal Low Current Negative Voltage Regulators TO-92 PL79L12XA3 Description The PL79L12XA3 is an inexpensive, easy-to-use device suitable for numerous applications requiring up to 100mA. Like the higher powered PL7900E3 series negative regulators, this device features thermal shutdown and current limiting, making it remarkably rugged. In most applications, no external components are required for operation. The PL79L12A3 device is useful for on-card regulation or any other application where a regulated negative voltage at a modest current level is needed. This regulator offers substantial advantage over the common resistor/zener diode approach. • No external components required •Internal short circuit current limiting •Internal thermal overload protection •Low cost •Complementary positive regulators offered(PL78L12A3) •Available in either ±3% or ±5% selection. Absolute Maximum Ratings (Ta=25°C) • Input Voltage……………………………………………………………………………………………….-35V • Total Power Dissipation……………………………………………………………………. Internally limited • Operating Temperature Range……………………………………………………………. 0 °C to +125 °C • Maximum Junction Temperature……………………………………………………………………..+150 °C • Storage Temperature Range………………………………………………………………-55 °C to +150 °C • Lead Temperature (Soldering 10S)……………………………….. ……………………………...260 °C Typical Application Representative Schematic Diagram Gnd Vin PL79L12 Vout R8 R6 Q10 R5 R9 Q5 R18 R1 C1 Q4 D1 C2 R17 R7 Q8 Q14 R16 Q9 Q1 R4 Outpu R2 Q12 Note: C1 and C2 are required if regulator is located far from power supply filter and load, or oscillation may induced on the loop. PL79L12A3 Q13 Z1 C Q2 Q11 R14 R3 Q6 R10 R11 Q7 R15 Input CYStek Product Specification Spec. No. : C531A3 Issued Date : 2003.04.08 Revised Date : . . Page No. : 2/3 CYStech Electronics Corp. Ordering Information Device PL79L12AA3 PL79L12BA3 Output Voltage Tolerance 3% 5% Electrical Characteristics Vin=-19V, Iout=40mA, 0°C≤Tj≤125°C, Cin=0.33uF, Cout=0.1uF (unless otherwise noted) Symbol Parameter Vo Output Voltage ∆Vo Line Regulation ∆Vo Load Regulation IQ Quiescent Current Quiescent Current Change Vn Output Noise Voltage ∆Vin / ∆Vout Ripple Rejection VD Dropout Voltage ∆IQ Symbol Parameter Vo Output Voltage ∆Vo Line Regulation ∆Vo Load Regulation IQ Quiescent Current Quiescent Current Change Vn Output Noise Voltage ∆Vin / ∆Vout Ripple Rejection VD Dropout Voltage ∆IQ PL79L12A3 Conditions Tj=25°C 1mA≤Io≤70mA 1mA≤Io≤40mA and -14.5V≥Vin≥-27V Tj=25°C, -14.5V≥Vin≥-27V Tj=25°C, -16V≥Vin≥-27V Tj=25°C, 1mA≤Io≤100mA Tj=25°C, 1mA≤Io≤40mA Tj=25°C Tj=125°C 1mA≤Io≤40mA -16V≥Vin≥-27V Ta=25°C, 10Hz≤f≤100KHz -15V≥Vin≥-25V, f=120Hz Tj=25°C,Iout=40mA Conditions Tj=25°C 1mA≤Io≤70mA 1mA≤Io≤40mA and -14.5V≥Vin≥-27V Tj=25°C, -14.5V≥Vin≥-27V Tj=25°C, -16V≥Vin≥-27V Tj=25°C, 1mA≤Io≤100mA Tj=25°C, 1mA≤Io≤40mA Tj=25°C Tj=125°C 1mA≤Io≤40mA -16V≥Vin≥-27V Ta=25°C, 10Hz≤f≤100KHz -15V≥Vin≥-25V, f=120Hz Tj=25°C,Iout=40mA PL79L12A Units Min Typ Max -11.64 -12.00 -12.36 -11.6 -12.4 V -11.6 -12.4 37 - 80 42 1.7 250 200 100 50 6.5 6.0 0.2 1.5 - mV mV mA mA µV dB V PL79L05B Units Min Typ Max -11.52 -12.00 -12.48 -11.4 -12.6 V -11.4 -12.6 37 - 80 42 1.7 250 200 100 50 6.5 6.0 0.2 1.5 - mV mV mA mA µV dB V CYStek Product Specification Spec. No. : C531A3 Issued Date : 2003.04.08 Revised Date : . . Page No. : 3/3 CYStech Electronics Corp. TO-92 Dimension α2 A B 1 2 3 79L12 α3 C D H I G α1 Style: Pin 1.GND 2.Vin 3.Vout E F 3-Lead TO-92 Plastic Package CYStek Package Code: A3 *: Typical Inches Min. Max. 0.1704 0.1902 0.1704 0.1902 0.5000 0.0142 0.0220 *0.0500 0.1323 0.1480 DIM A B C D E F Millimeters Min. Max. 4.33 4.83 4.33 4.83 12.70 0.36 0.56 *1.27 3.36 3.76 DIM G H I α1 α2 α3 Inches Min. Max. 0.0142 0.0220 *0.1000 *0.0500 *5° *2° *2° Millimeters Min. Max. 0.36 0.56 *2.54 *1.27 *5° *2° *2° 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. PL79L12A3 CYStek Product Specification