ts7908 Taiwan Semiconductor Company, Ltd. (TSC), ts7908 Datasheet

ts7908

Manufacturer Part Number

ts7908

Description

3-terminal Fixed Negative Output Voltage Regulator

Manufacturer

Taiwan Semiconductor Company, Ltd. (TSC)

Datasheet

1.TS7908.pdf (7 pages)

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Note :

TS7900 series

General Description

The TS7900 series of fixed output negative voltage regulators are intended as complements to the popular TS7800

series device. These negative regulators are available in the same seven-voltage options as the TS7800 devices. In

addition, one extra voltage option commonly employed in MECL systems is also available in the negative TS7900 Series.

Available in fixed output voltage options from -5.0 to -24 volts, these regulators employ current limiting, thermal shutdown,

and safe-area compensation--making them remarkably rugged under most operating conditions. With adequate

heatsinking they can deliver output currents in excess of 1 ampere.

This series is offered in 3-pin TO-220, ITO-220 package.

Features

Ordering Information

Absolute Maximum Rating

Input Voltage

Power Dissipation

Operating Junction Temperature Range

Storage Temperature Range

Note: Where xx denotes voltage option.

TS79xxCZ

TS79xxCI

Output current up to 1A

No external components required

Internal thermal overload protection

Internal short-circuit current limiting

Output transistor safe-area compensation

Output voltage offered in 4% tolerance

Part No.

*** Follow the derating curve

** TS7924

* TS7905 to TS7918

Operating Temp.

ITO-220

-20 ~ +85

(Ambient)

3-Terminal Fixed Negative Output Voltage Regulator

ITO-220

TO-220

(Heatsink surface

connected to Pin 2)

Pin assignment:

TO-220

ITO-220

Package

Ground

Input

Output

1-7

TS7900 series

Without heatsink

Standard Application

A common ground is required between the input and the

output voltages. The input voltage must remain typically 2.0V

above the output voltage even during the low point on the

Input ripple voltage.

XX = these two digits of the type number indicate voltage.

Vin **

Pt ***

Vin *

** = Co is not needed for stability; however, it does improve

* = Cin is required if regulator is located an appreciable

STG

distance from power supply filter.

transient response.

Voltage Range - 5V to - 24V

Output Current up to 1A

-65 ~ +150

0 ~ +150

- 35

- 40

2003/12 rev. A

C/W

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ts7908 Summary of contents

Page 1

Fixed Negative Output Voltage Regulator ITO-220 Pin assignment: (Heatsink surface connected to Pin 2) General Description The TS7900 series of fixed output negative voltage regulators are intended as complements to the popular TS7800 series device. These negative regulators are ...

Page 2

TS7905 Electrical Characteristics o (Vin= -10V, Iout=500mA @Tj@125 Parameter Symbol Output voltage Vout Line Regulation REGline Load Regulation REGload Quiescent Current Iq Quiescent Current Change ûlq Output Noise Voltage Vn Ripple Rejection Ratio RR Voltage Drop Vdrop Peak ...

Page 3

... TS7908 Electrical Characteristics o (Vin=-14V, Iout=500mA @Tj@125 Parameter Symbol Output Voltage Vout Line Regulation REGline Load Regulation REGload Quiescent Current Iq Quiescent Current Change ûlq Output Noise Voltage Vn Ripple Rejection Ratio RR Voltage Drop Vdrop Peak Output Current Io peak Temperature Coefficient of ûVout/ûTj ...

Page 4

TS7912 Electrical Characteristics o (Vin=-19V, Iout=500mA @Tj@125 Parameter Symbol Output Voltage Vout Line Regulation REGline Load Regulation REGload Quiescent Current Iq Quiescent Current Change ûlq Output Noise Voltage Vn Ripple Rejection Ratio RR Voltage Drop Vdrop Peak Output ...

Page 5

TS79818 Electrical Characteristics o (Vin=-27V, Iout=500mA @Tj@125 Parameter Symbol Output Voltage Vout Line Regulation REGline Load Regulation REGload Quiescent Current Iq Quiescent Current Change ûlq Output Noise Voltage Vn Ripple Rejection Ratio RR Voltage Drop Vdrop Peak Output ...

Page 6

Electrical Characteristics Curve FIGURE 1 - Worst Case Power Dissipation v.s. Ambient Temperature FIGURE 3 –Ripple Rejection v.s. Frequency FIGURE 5 –Output Voltage v.s. Junction Temperature TS7900 series FIGURE 2 - Peak Output Current v.s. Input-Output Differential Voltage FIGURE 4 ...

Page 7

TO-220 Mechanical Drawing ITO-220 Mechanical Drawing TS7900 series K L MILLIMETERS DIM MIN A 10.000 P B 3.240 C 2.440 0.381 F 2.345 M G 4.690 H 12.700 ...

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