KA317MI - Fairchild Semiconductor Corporation

www.fairchildsemi.com

Rev. 5.0

Features

• Output current in excess of 0.5A

• Output adjusta b l e betwe en 1.2V an d 37V

• Internal thermal-overload protection

• Internal short-circuit current-limiting

• Output transistor safe-area compensation

• Floating operation for high-v oltage applications

Description

The KA317M is a 3-terminal adjustable positive voltage reg-

ulator capabl e of su pplyi ng in exce ss of 500mA over an out-

put voltage range of 1.2V to 37V. This voltage regulator is

exceptionally easy to use and requires only two extern al

resistors to set the Output voltage.

TO-220

D-PAK

1. Adj 2. Output 3. Input

I-PAK

Internal Block Diagram

Rlimit

3Vin

Voltage

Reference

Vad

Protection

Circuitry

Input

Output

KA317M

3-terminal 0.5A positive adjustab le re gulator

KA317M

Absolute Maximum Ratings

Electrical Characteristics

(VI - VO = 5V, IO = 0.1A, 0°C ≤ TJ ≤+125°C, PDMAX =7.5W, unless otherwise specified)

• Load and Line regulation are specified at constant junction temperature. Change in VO due to h e at ing effects must be taken

into account separately. Pulse testing with low duty cycle is used.

Parameter Symbol Value Unit

Input-Output Voltage Differential VI - VO40 V

Power Dissipation PDInternally limited W

Operating Temperature Range TOPR 0 ~ +125 °C

Storage Temperature Range TSTG -65 ~+125 °C

Parameter Symbol Conditions Min. Typ. Max. Unit

*Line Regulation Rline

TA = +25°C

3V ≤VI −VO ≤ 40V - 0.01 0.04 %/ V

3V ≤ VI −VO ≤ 40V - 0.02 0.07

*Load Regulation

Rload

TA =+ 25°C

10mA ≤ IO ≤ 0.5A

VO ≤ 5V

VO ≥ 5V

-5

0.1 25

0.5 mV

%/ VO

10mA ≤ IO ≤ 0.5A

VO ≤5V

VO ≥5V -20

0.3 70

1.5 mV

%/ VO

Adjustment Pin Current IADJ -- 50 100 uA

Adjustment Pin Current

Change ∆IADJ

3V ≤ VI - VO ≤ 40V

10mA≤ IO ≤ 0.5A

PD < PDMAX -0.2 5 uA

Reference Voltage VREF

3V < VI - VO < 40V

10mA ≤ IO ≤ 0.5A

PD < PDMAX 1.20 1.25 1.30 V

Temperature Stability STT-- 0.7 %/ VO

Minimum Load Current to

Maintain Regulation IL(MIN) VI - VO ≤ 40V - 3.5 10 mA

Maximum Output Current IO(MAX) VI - VO ≤15V

PD < PDMAX 0.5 0.9 -

VI - VO ≤ 40V

PD < PDMAX, TA =+ 25°C0.15 0.25 - A

RMS Noise, % of VOUT eN TA = +25°C

10Hz < f < 10KHz - 0.003 - %/ VO

Ripple Rejection RR

VO = 10V, f = 120Hz

without CADJ

CADJ = 10uF 66 65

80 -dB

Long-Term Stability ST TJ =+ 125°C, 1000Hours - 0.3 1 %/

1000Hrs

KA317M

Typical Application

Figure 1. 1 5V Electronic Sh utdown Regul ator

D1 protects the device during an input short circuit.

Figu re 2. Slow Tu rn-On Regula to r

Figure 3. Current Regulator

Input Output

Input

Output

KA317M

Mechanical Dimensions

Package

4.50 ±0.20

9.90 ±0.20

1.52 ±0.10

0.80 ±0.10 2.40 ±0.20

10.00 ±0.20

1.27 ±0.10

ø3.60 ±0.10

(8.70)

2.80 ±0.1015.90 ±0.20

10.08 ±0.30 18.95MAX.

(1.70)

(3.70)(3.00)

(1.46)

(1.00)

(45°)

9.20 ±0.2013.08 ±0.20

1.30 ±0.10

1.30 +0.10

–0.05

0.50 +0.10

–0.05

2.54TYP

[2.54 ±0.20]2.54TYP

[2.54 ±0.20]

TO-220

KA317M

Mechanical Dimensions (Continued)

Package

6.60

±0.20

2.30

±0.10

0.50

±0.10

5.34

±0.30

0.70

±0.20

0.60

±0.20

0.80

±0.20

9.50

±0.30

6.10

±0.20

2.70

±0.20

9.50

±0.30

6.10

±0.20

2.70

±0.20

MIN0.55

0.76

±0.10

0.50

±0.10

1.02

±0.20

2.30

±0.20

6.60

±0.20

0.76

±0.10

(5.34)

(1.50)

(2XR0.25)

(5.04)

0.89

±0.10

(0.10) (3.05)

(1.00)

(0.90)

(0.70)

0.91

±0.10

2.30TYP

[2.30±0.20]

2.30TYP

[2.30±0.20]

MAX0.96

(4.34)(0.50) (0.50)

D-PAK

KA317M

Mechanical Dimensions (Continued)

Package

6.60 ±0.20

0.76 ±0.10

MAX0.96

2.30TYP

[2.30±0.20] 2.30TYP

[2.30±0.20]

0.60 ±0.20

0.80 ±0.10

1.80 ±0.20

9.30 ±0.30

16.10 ±0.30

6.10 ±0.20

0.70 ±0.20

5.34 ±0.20

0.50 ±0.10

2.30 ±0.20

(0.50) (0.50)(4.34)

I-PAK

KA317M

Ordering Information

Product Number Package Operating Temperature

KA317M TO-220 0 ~ 125 °C KA317MR D-PAK

KA317MI I-PAK

KA317M

7/13/00 0.0m 001

Stock#DSxxxxxxxx

 2000 Fairch il d Semiconduc tor International

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FAIRCHILD’S PRODUCTS AR E NOT AUTHORIZED FOR USE AS C RITICAL COMPONENTS I N LIFE S UPPORT DEVICE S

OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF FAIRCHILD SEMICONDUCTOR

INTERNATIONAL. As used herein:

1. Life support devices or systems are devices or systems

which, (a) are intended for surgical implant into the body,

or (b) support or sustain life, and (c) whose failure to

perform when properly used in accordance with

instructions for use provided in the labeling, can be

reasonably expected to result in a significant injury of the

user.

2. A critical component in any component of a life support

device or syst em who se failure to perform can be

reasonably expected to cause the failure of the life support

device or system, or to affect its safety or effec tiv ene ss.