KA317TU - Fairchild - Datasheet.Live

www.fairchildsemi.com

Rev. 1.0.3

Features

• Output Current in Excess of 1.5A

• Output Adjustable Between 1.2V and 37V

• Internal Thermal Overload Protection

• Internal Short Circui t Current Limiting

• Output Transistor Safe Area Compensation

• TO-220 Package

Description

This monolithic integrated circuit is an ad justable 3-termi nal

positive voltage regulator designed to supply more than 1.5A

of load current with an output voltage adjustable over a 1.2V

to 37V. It employs internal current limiting, thermal shut

down and safe area compensation.

TO-220 (Dual Gauge)

1. Adj 2. Output 3. Input

Output

Internal Block Diagram

Rlimit

3Vin

Voltage

Reference

Vad

Protection

Circuitry

Input

Output

KA317

3-Terminal Positive Adjustable Regulator

KA317

Absolute Maximum Ratings

Electrical Characteristics

(VI-VO= 5V, IO= 0.5A, 0°C ≤ TJ ≤ +125°C, IMAX = 1.5A, PDMAX = 20W, unle ss oth e rwis e sp ecif ied )

Note :

1. Load and line re gulation are specified at constant junction temperature. Change in VD du e to heating effects must be taken

into account separately. Pulse testing with low duty is used. (PMAX = 20W)

2. CADJ , when used, is connected between the adjustment pin and ground.

3. These parameters, although guaranteed, are not 100% tested in production.

Parameter Symbol Value Unit

Input-Output Voltage Differential VI - VO40 V

Lead Temperature TLEAD 230 °C

Power Dissipation PDInternally limited W

Thermal Resistance Junction to Case RθJC 5°C/W

Operating Junction Temperature Range Tj0 ~ +125 °C

Storage Temperature Range TSTG -65 ~ +125 °C

Temperature Coefficient of Output Voltage ΔVo/ΔT ±0.02 %/°C

Parameter Symbol Conditions Min. Typ. Max. Unit

Line Regulation (Note1) Rline TA = +25°C

3V ≤ VI - VO ≤ 40V - 0.01 0.04 %/V

3V ≤ VI - VO ≤ 40V - 0.02 0.07 %/V

Load Regulation (Note1) Rload

TA = +25°C, 10mA ≤IO ≤ IMAX

VO< 5V

VO ≥ 5V -

-18

0.4 25

0.5 mV

%/VO

10mA ≤ IO ≤ IMAX

VO < 5V

VO ≥ 5V -

-40

0.8 70

1.5 mV

%/VO

Adjustable Pin Current IADJ --46100μA

Adjustable Pin Current Change ΔIADJ 3V ≤ VI - VO ≤ 40V

10mA ≤ IO ≤ IMAX

PD ≤ PMAX -2.05μA

Reference Volt ag e VREF 3V ≤ VIN - VO ≤ 40V

10mA ≤ IO ≤ IMAX

PD ≤ PMAX 1.20 1.25 1.30 V

Temperature Stability (Note3) STT--0.7-%/V

Minimum Load Current to Maintain

Regulation IL(MIN) VI - VO = 40V - 3.5 12 mA

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

VI - VO ≤ 40V, PD ≤ PMAX

TA=25°C

1.5

-2.2

0.3 -

-A

RMS Noise, % of VOUT (Note3) eNTA= +25°C, 10Hz ≤ f ≤ 10kHz - 0.003 0.01 %/VO

Ripple Rejection (Note3) RR VO = 10V, f = 120Hz

without CADJ

CADJ = 10μF (Note2) -

66 60

75 -

-dB

Long-Term Stability, TJ = THIGH ST TA = +25°C for end point

measurements, 1000HR -0.31%

KA317

Typical Performance Characteristics

Figure 1. Load Regulation

Figure 3. Dropout Voltage

Figure 2. Adjustment Current

Figure 4. Reference Voltage

TEMPERATURE (°C)

OUTPUT VOLTAGE DEVIATION(%)

TEMPERATURE (°C)

INPUT-OUTPUT DIFFERENTIAL(V)

TEMPERATURE (°C)

ADJUSTMENT CURRENT(uA)

TEMPERATURE (°C)

REFERENCE VOLTAGE(V)

KA317

Typical Application

Figure 5. Programmable Regulator

Ci is required when regulator is located an appreciable distance from power supply filter.

Co is not needed for stability, however, it does improve transient response.

Since IADJ is controlled to less than 100μA, the error associated with this term is negligible in m ost applications.

KA317

VI Vo

Vadj R1

Output

Input

1uF

0.1uF

adj

Iadj

VO = 1.25V (1+R2/R1)+IadjR2

240Ω

KA317

Mechanical Dimensions

Package Dimensions in millimeters

4.50

±0.2

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

±0.10

15.90

±0.20

10.08

±0.30

18.95MAX.

(1.70)

(3.70)(3.00)

(1.46)

(1.00)

(45°)

9.20

±0.20

13.08

±0.20

1.30

±0.10

1.30

+0.1

–0.0

0.50

+0.10

–0.05

2.54TYP

[2.54

±0.20

]2.54TYP

[2.54

±0.20

]

TO-220 [DUAL GAUGE]

KA317

12/29/ 11 0.0m 001

Stock#DS400293

LIFE SUPPORT POLICY

FAIRCHILD’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT DEVICES

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

CORPORATION. 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 system whose failure to perform can be

reasonably expected to cause the failure of the life support

device or system, or to affect its safety or effectiveness.

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DISCLAIMER

FAIRCHILD SEMICONDUCTOR RESERVES THE RIGHT TO MAKE CHANGES WITHOUT FURTHER NOTICE TO ANY

PRODUCTS HEREIN TO IMPROVE RELIABILITY, FUNCTION OR DESIGN. FAIRCHILD DOES NOT ASSUME ANY

LIABILITY ARISING OUT OF THE APPLICATION OR USE OF ANY PRODUCT OR CIRCUIT DESCRIBED HEREIN; NEITHER

DOES IT CONVEY ANY LICENSE UNDER ITS PATENT RIGHTS, NOR THE RIGHTS OF OTHERS.v

Ordering Information

Product Number Package Operating Temperature

KA317 TO-220 (Dual Gauge) 0°C to +125°C