TSC TS317L Technical data

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TS317L

3-Terminal Adjustable Output Positive Voltage Regulator

Pin assignment:

1. Input

2. Output

3. Output

4. Adjust

5. N/C

6. Output

7. Output

8. N/C

Pin assignment:

1. Adjustable

2. Output

3. Input

Output Voltage Range From

1.25V to 37V

Output Current up to 100mA

General Description

The TS317L is adjustable 3-terminal positive voltage regulator capable of supplying in excess of 100mA over an output voltage range of 1.25 V to 37 V. This voltage regulator is exceptionally easy to use and require only two external resistors to set the output voltage. Further, it employs internal current limiting, thermal shutdown and safe area compensation, making it essentially blow-out proof. Besides replacing fixed regulators, the TS317L is useful in a wide variety of other applications. Since the regulator is “floating “ and sees only the input-to-output differential voltage, supplies of several hundred volts can be regulated as long as the maximum input-to-output differential is not exceeded. Also, it makes an especially simple adjustable switching regulator, a programmable output regulator, or by connecting a fixed resistor between the adjustment and output, the TS317L can be used as a precision current regulator. Supplyies with electronic shutdown can be achieved by clamping the adjustment terminal to ground which programs the output to

1.25V where most loads draw little current. The TS317L is offered in 3-pin TO-92 and SOP-8 package.

Features

 Output current up to 100mA

 Output Adjustable between 1.25 V and 37 V

 Internal Thermal Overload Protection

 Internal Short-Circuit Current Limiting Constant with

Temperature

 Output Transistor Safe-Area Compensation

 Floating Operation for High Voltage Applications

 Eliminates Stocking Many Fixed Voltages

 Output voltage offered in 4% tolerance

Ordering Information

Part No. Operating Temp. Package

TS317LCS SOP-8

TS317LCT

-20 ~ +125

TO-92

Standard Application

Vout = 1.25 V * (1 + R2 / R1 ) + Iadjj * R2

Since I associated with this term is negligible in most applications 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.

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

is controlled to less than 100 µA, the error

Adj

* = Cin is required if regulator is located an appreciable

distance from power supply filter.

improve transient response.

TS317L 1-6 2003/12 rev. A

Absolute Maximum Rating

Input Voltage Vin 40 V

Power Dissipation Pd Internal Limited W

Operating Junction Temperature Range TJ -20 ~ +125

Storage Temperature Range T

Lead Temperature (soldering 4 sec.) T

-55 ~ +150

STG

+260 oC

LEAD

Note: “Absolute maximum rating” indicated limits beyond which damage to the device may occur. Operating ratings

indicate conditions for which the device is functional, but do not guarantee specific performance limits.

Electrical Characteristics

(Tj =T

Reference voltage

(Note 4)

Line regulation

(Note 3)

Load regulation

(Note 3)

Thermal regulation Tj = 25 oC, 10 ms Pulse -- -- 0.03 0.2 %/W

Adjustment pin current Iadj -- 50 100 uA

Adjustment pin current

change

Current limit 3V ≤ VI - VO ≤ 13V

Temperature stability T

Minimum load current VI - VO ≤ 40V Imin -- 3.5 5 mA

RMS Noise, % of VO Ta =25 oC, 10H

Ripple rejection ratio Vout= 10V, f= 120Hz, Cadj= 0 -- -- 65 -- dB

Long-term stability

(Note 5)

Thermal resistance

Junction to Ambient

Notes:

1. T

2. Pmax: CS package=0.5W, CT package=0.625W,

3. Load and line regulation are specified at constant junction temperature. Changes in output voltage due to heating

4. Selected devices with tightened tolerance reference voltage available.

5. Since Long-Term Stability cannot be measured on each device before shipment, this specification is an engineering

LOW

to T

see [Note 1], Vin-Vout= 5V, Io=40mA; Pmax per [Note 2]; unless otherwise specified.)

HIGH

CHARACTERISTIC CONDITION SYMBOL MIN. TYP. MAX. UNIT

5mA ≤ Io ≤ 100mA

Vref 1.20 1.25 1.30 V

3V ≤ Vi - Vo ≤ 40V

Tj = 25 oC, 3V ≤ Vi -Vo ≤ 40V,

REGline -- 0.01 0.07 %/V

Io=20mA

C, 5mA ≤ IO ≤ Imax, REGload -- 0.1 1.5 %

-- 0.2 5.0 uA

∆Iadj

LIMIT

≤ Tj ≤ T

LOW

= 125 oC, 1000hrs S -- 0.3 1.0 %

HIGH

≤ f ≤ 10KHZ N -- 0.003 -- %

-- 0.65 -- %

Rθja

200

180

165

= -20 oC, T

LOW

Tj = 25

Pd ≤ Pmax, 5mA ≤ Io ≤ Imax,

3V ≤ VI - VO ≤ 40V

VI - VO = 40V

CT package 0.4” leads

CS package

= + 125 oC

HIGH

effects must be taken into account separately. Pulse testing with low duty cycle is used.

estimate of average stability from lot to lot.

C/W

TS317L 2-6 2003/12 rev. A

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