317B 판매점 - THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR

317B 반도체 회로 부품 판매점

THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR

ON Semiconductor

Order this document by LM317/D

Three-Terminal Adjustable

Output Positive Voltage

Regulator

The LM317 is an adjustable 3–terminal positive voltage regulator capable

of supplying in excess of 1.5 A over an output voltage range of 1.2 V to 37 V.

This voltage regulator is exceptionally easy to use and requires 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.

The LM317 serves a wide variety of applications including local, on card

regulation. This device can also be used to make a programmable output

regulator, or by connecting a fixed resistor between the adjustment and

output, the LM317 can be used as a precision current regulator.

• Output Current in Excess of 1.5 A

• Output Adjustable between 1.2 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

• Available in Surface Mount D2PAK, and Standard 3–Lead Transistor

Package

• Eliminates Stocking many Fixed Voltages

LM317

THREE–TERMINAL

ADJUSTABLE POSITIVE

VOLTAGE REGULATOR

SEMICONDUCTOR

TECHNICAL DATA

T SUFFIX

PLASTIC PACKAGE

CASE 221A

Heatsink surface

connected to Pin 2.

Vin

Cin*

0.1 µF

Standard Application

LM317

IAdj Adjust

Vout

240

+ CO**

1.0 µF

+ ǒ ) Ǔ )** Cin is required if regulator is located an appreciable distance from power supply filter.

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

Vout

1.25 V 1

IAdj R2

Since IAdj is controlled to less than 100 µA, the error associated with this term is

negligible in most applications.

MOTOROLA ANALOG IC DEVICE DATA

Pin 1. Adjust

2. Vout

3. Vin

D2T SUFFIX

PLASTIC PACKAGE

CASE 936

(D2PAK)

Heatsink surface (shown as terminal 4 in

case outline drawing) is connected to Pin 2.

ORDERING INFORMATION

Device

Operating

Temperature Range

Package

LM317BD2T

Surface Mount

TJ = – 40° to +125°C

LM317BT

Insertion Mount

LM317D2T

LM317T

Surface Mount

TJ = 0° to +125°C Insertion Mount

Rev 1

LM317

MAXIMUM RATINGS

Rating

Input–Output Voltage Differential

Power Dissipation

Case 221A

TA = +25°C

Thermal Resistance, Junction–to–Ambient

Thermal Resistance, Junction–to–Case

Case 936 (D2PAK)

TA = +25°C

Thermal Resistance, Junction–to–Ambient

Thermal Resistance, Junction–to–Case

Operating Junction Temperature Range

Storage Temperature Range

Symbol

VI–VO

Value

Unit

Vdc

PD Internally Limited W

θJA 65 °C/W

θJC 5.0 °C/W

PD Internally Limited W

θJA 70 °C/W

θJC 5.0 °C/W

– 40 to +125

°C

Tstg

– 65 to +150

°C

ELECTRICAL CHARACTERISTICS (VI–VO = 5.0 V; IO = 0.5 A for D2T and T packages; TJ = Tlow to Thigh [Note 1]; Imax and Pmax

[Note 2]; unless otherwise noted.)

Characteristics

Figure Symbol

Min

Typ

Max

Unit

Line Regulation (Note 3), TA = +25°C, 3.0 V ≤ VI–VO ≤ 40 V

Load Regulation (Note 3), TA = +25°C, 10 mA ≤ IO ≤ Imax

VO ≤ 5.0 V

VO ≥ 5.0 V

Thermal Regulation, TA = +25°C (Note 6), 20 ms Pulse

Adjustment Pin Current

Adjustment Pin Current Change, 2.5 V ≤ VI–VO ≤ 40 V,

10 mA ≤ IL ≤ Imax, PD ≤ Pmax

Reference Voltage, 3.0 V ≤ VI–VO ≤ 40 V,

10 mA ≤ IO ≤ Imax, PD ≤ Pmax

Line Regulation (Note 3), 3.0 V ≤ VI–VO ≤ 40 V

Load Regulation (Note 3), 10 mA ≤ IO ≤ Imax

VO ≤ 5.0 V

VO ≥ 5.0 V

Temperature Stability (Tlow ≤ TJ ≤ Thigh)

Minimum Load Current to Maintain Regulation (VI–VO = 40 V)

Maximum Output Current

VI–VO ≤ 15 V, PD ≤ Pmax, T Package

VI–VO = 40 V, PD ≤ Pmax, TA = +25°C, T Package

RMS Noise, % of VO, TA = +25°C, 10 Hz ≤ f ≤ 10 kHz

Ripple Rejection, VO = 10 V, f = 120 Hz (Note 4)

Without CAdj

CAdj = 10 µF

Long–Term Stability, TJ = Thigh (Note 5), TA = +25°C for

Endpoint Measurements

1 Regline

2 Regload

Regtherm

3 IAdj

1, 2 ∆IAdj

–

0.01 0.04

%/V

5.0 25

0.1 0.5 % VO

0.03 0.07 % VO/W

50 100

µA

0.2 5.0

µA

3 Vref 1.2 1.25 1.3 V

1 Regline – 0.02 0.07 % V

2 Regload

–

20 70

0.3 1.5 % VO

3 TS – 0.7 – % VO

3 ILmin – 3.5 10 mA

3 Imax

1.5 2.2

–

0.15 0.4

–

– 0.003 –

% VO

4 RR

– 65 –

66 80

–

3 S – 0.3 1.0 %/1.0 k

Hrs.

Thermal Resistance Junction to Case, T Package

RθJC

– 5.0 – °C/W

NOTES: 1. Tlow to Thigh = 0° to +125°C, for LM317T, D2T. Tlow to Thigh = – 40° to +125°C, for LM317BT, BD2T.

2. Imax = 1.5 A, Pmax = 20 W

3. Load and line regulation are specified at constant junction temperature. Changes in VO due to heating effects must be taken into account separately.

Pulse testing with low duty cycle is used.

4. CAdj, when used, is connected between the adjustment pin and ground.

5. Since Long–Term Stability cannot be measured on each device before shipment, this specification is an engineering estimate of average stability

from lot to lot.

6. Power dissipation within an IC voltage regulator produces a temperature gradient on the die, affecting individual IC components on the die. These

effects can be minimized by proper integrated circuit design and layout techniques. Thermal Regulation is the effect of these temperature gradients

on the output voltage and is expressed in percentage of output change per watt of power change in a specified time.

2 MOTOROLA ANALOG IC DEVICE DATA

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317B regulator

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317B 반도체 회로 부품 판매점

THREE.TERMINAL ADJUSTABLE POSITIVE VOLTAGE REGULATOR

국내 전력반도체 판매점

일반적인 전자부품 판매점

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