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CYStech Electronics Corp.
Three Terminal Low Current Negative Voltage Regulators
Spec. No. : C530A3 Issued Date : 2003.04.04 Revised Date : .. Page No. : 1/3
TO-92
PL79L05XA3
Description
The PL79L05XA3 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 PL79L05A3 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 (PL78L05A3) *Available in either 3% or 5% selection.
Absolute Maximum Ratings (Ta=25C)
* Input Voltage.............................................................................................................-30V * 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
PL79L05
Vout
R5 R18 R1 D1
R6
R8 Q10 Q5 Q4 R7 Q8 Q14 Q9 R4 R16 R9
R17
C1
C2
Q1
Outpu
Q12
R2 Z1 C R3 Q6 R10 R11 Q7 R15 Q2 Q11 R14 Q13
Note: C1 and C2 are required if regulator is located far from power supply filter and load, or oscillation may induced on the loop.
PL79L05A3
Input
CYStek Product Specification
CYStech Electronics Corp.
Ordering Information
Device PL79L05AA3 PL79L05BA3 Output Voltage Tolerance 3% 5%
Spec. No. : C530A3 Issued Date : 2003.04.04 Revised Date : .. Page No. : 2/3
Electrical Characteristics
Vin=-10V, Iout=40mA, 0CTj125C, Cin=0.33uF, Cout=0.1uF (unless otherwise noted) Symbol Parameter Conditions Tj=25C 1mAIo70mA 1mAIo40mA and -7VVin-20V Tj=25C, -7VVin-20V Tj=25C, -8VVin-20V Tj=25C, 1mAIo100mA Tj=25C, 1mAIo40mA Tj=25C Tj=125C 1mAIo40mA -8VVin-20V Ta=25C, 10Hzf100KHz -8VVin-18V, f=120Hz Tj=25C,Iout=40mA Conditions Tj=25C 1mAIo70mA 1mAIo40mA and -7VVin-20V Tj=25C, -7VVin-20V Tj=25C, -8VVin-20V Tj=25C, 1mAIo100mA Tj=25C, 1mAIo40mA Tj=25C Tj=125C 1mAIo40mA -8VVin-20V Ta=25C, 10Hzf100KHz -8VVin-18V, f=120Hz Tj=25C,Iout=40mA PL79L05A Min Typ Max -4.85 -5.00 -5.15 -4.8 -5.2 -4.8 41 40 49 1.7 -5.2 150 100 60 30 6 5.5 0.1 1.5 mV mV mA mA V dB V Units Units
Vo
Output Voltage
V
Vo Vo IQ IQ
Line Regulation Load Regulation Quiescent Current
Quiescent Current Change Vn Output Noise Voltage Vin / Vout Ripple Rejection VD Dropout Voltage Symbol Parameter
Vo
Output Voltage
PL79L05B Min Typ Max -4.8 -5.00 -5.2 -4.75 -5.25 -4.75 41 40 49 1.7 -5.25 150 100 60 30 6 5.5 0.1 1.5 -
V
Vo Vo IQ IQ
Line Regulation Load Regulation Quiescent Current
mV mV mA mA V dB V
Quiescent Current Change Vn Output Noise Voltage Vin / Vout Ripple Rejection VD Dropout Voltage
PL79L05A3
CYStek Product Specification
CYStech Electronics Corp.
TO-92 Dimension
2
Spec. No. : C530A3 Issued Date : 2003.04.04 Revised Date : .. Page No. : 3/3
A B
1 2 3
3
79L05
C
D
H I E F
G
1
Style: Pin 1.GND 2.Vin 3.Vout 3-Lead TO-92 Plastic Package CYStek Package Code: A3
*: Typical
DIM A B C D E F
Inches Min. Max. 0.1704 0.1902 0.1704 0.1902 0.5000 0.0142 0.0220 *0.0500 0.1323 0.1480
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 1 2 3
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.
PL79L05A3
CYStek Product Specification

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