LM317A

활성

높은 정확도의 1.5A, 40V, 조정 가능 선형 전압 레귤레이터

지금 주문

데이터 시트

document-pdfAcrobat LM317A 1% Accurate 1.5A Adjustable Voltage Regulator datasheet (Rev. A) (영어) PDF | HTML

LM317A

활성

데이터 시트

지금 주문

제품 상세 정보

Output options

Adjustable Output, Fixed Output

Iout (max) (A)

1.5

Vin (max) (V)

40

Vin (min) (V)

3

Vout (max) (V)

37

Vout (min) (V)

1.2

Fixed output options (V)

37

Rating

Catalog, Military

Noise (µVrms)

38

PSRR at 100 KHz (dB)

40

Iq (typ) (mA)

5

Thermal resistance θJA (°C/W)

24

Load capacitance (min) (µF)

0

Regulated outputs (#)

1

Accuracy (%)

5

Dropout voltage (Vdo) (typ) (mV)

2250

Operating temperature range (°C)

-40 to 125

Output options

Adjustable Output, Fixed Output

Iout (max) (A)

1.5

Vin (max) (V)

40

Vin (min) (V)

3

Vout (max) (V)

37

Vout (min) (V)

1.2

Fixed output options (V)

37

Rating

Catalog, Military

Noise (µVrms)

38

PSRR at 100 KHz (dB)

40

Iq (typ) (mA)

5

Thermal resistance θJA (°C/W)

24

Load capacitance (min) (µF)

0

Regulated outputs (#)

1

Accuracy (%)

5

Dropout voltage (Vdo) (typ) (mV)

2250

Operating temperature range (°C)

-40 to 125

SOT-223 (DCY)

4

45.5 mm² 6.5 x 7

TO-220 (NDE)

3

46.5328 mm² 10.16 x 4.58

TO-252 (NDP)

3

65.2078 mm² 6.58 x 9.91

TO-CAN (NDT)

3

91.6742 mm² 10.03 x 9.14

For a newer drop-in alternative, see the LM317
Typical 0.005%/V line regulation
1% output voltage tolerance
1.5-A output current
Adjustable output down to 1.25 V
Input-output differential up to 40 V
Current limit constant with temperature
No output capacitor required
Short-circuit protected output
−40°C to 125°C operating temperature range

For a newer drop-in alternative, see the LM317
Typical 0.005%/V line regulation
1% output voltage tolerance
1.5-A output current
Adjustable output down to 1.25 V
Input-output differential up to 40 V
Current limit constant with temperature
No output capacitor required
Short-circuit protected output
−40°C to 125°C operating temperature range

The LM317A adjustable 3-terminal, positive-voltage regulators are capable of supplying current in excess of 1.5 A over a 1.25-V to 37-V output range and provide 1% output-voltage accuracy. Both line regulation and load regulation are better achieved with the LM317A device than with standard fixed regulators.

The LM317A offers full overload protection such as over current, thermal-overload protection, and safe-area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.

Typically, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is needed. An optional output capacitor can be added to improve transient response and can be replaced with a ceramic and appropriate ESR. The adjustment terminal can be bypassed to achieve very high ripple-rejection ratios that are difficult to achieve with standard 3-terminal regulators.

Because the LM317A regulator is floating and detects 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. Exceeding the maximum input-to-output deferential will result in short-circuiting the output. By connecting a fixed resistor between the adjustment pin and output, the LM317A can be also used as a precision current regulator.

For applications requiring greater output current, see the LM150 series (3A) and LM138 series (5A) data sheets. For the negative complement, see the LM137 series data sheet.

The LM317A adjustable 3-terminal, positive-voltage regulators are capable of supplying current in excess of 1.5 A over a 1.25-V to 37-V output range and provide 1% output-voltage accuracy. Both line regulation and load regulation are better achieved with the LM317A device than with standard fixed regulators.

The LM317A offers full overload protection such as over current, thermal-overload protection, and safe-area protection. All overload protection circuitry remains fully functional even if the adjustment terminal is disconnected.

Typically, no capacitors are needed unless the device is situated more than 6 inches from the input filter capacitors, in which case an input bypass is needed. An optional output capacitor can be added to improve transient response and can be replaced with a ceramic and appropriate ESR. The adjustment terminal can be bypassed to achieve very high ripple-rejection ratios that are difficult to achieve with standard 3-terminal regulators.

Because the LM317A regulator is floating and detects 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. Exceeding the maximum input-to-output deferential will result in short-circuiting the output. By connecting a fixed resistor between the adjustment pin and output, the LM317A can be also used as a precision current regulator.

For applications requiring greater output current, see the LM150 series (3A) and LM138 series (5A) data sheets. For the negative complement, see the LM137 series data sheet.

filter

기타 선형 및 저손실(LDO) 레귤레이터 찾기

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new

대안 비교

비교 대상 장치와 동일한 기능을 지원하는 핀 대 핀

LM317

활성

1.5A, 40V, 조정 가능 선형 전압 레귤레이터 Pin-to-pin option for cost-sensitive applications

LM317HV

활성

1.5A, 60V, 조정 가능 선형 전압 레귤레이터 Pin-to-pin equivalent which supports 60-V VIN

다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능

LM1086

활성

1.5A, 29V, 선형 전압 레귤레이터 This product is a lower dropout (500mV), 1-A LDO regulator.

기술 자료

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16개 모두 보기

	유형	직함		날짜
*	Data sheet	LM317A 1% Accurate 1.5A Adjustable Voltage Regulator datasheet (Rev. A)	PDF \| HTML	2020/06/09
	Application note	A Topical Index of TI LDO Application Notes (Rev. F)		2019/06/27
	EVM User's guide	LM317A-337N-EVM User's Guide		2016/01/21
	Technical article	Create a simple LED driver	PDF \| HTML	2015/10/20
	Technical article	Overview of voltage regulator packaging	PDF \| HTML	2015/08/27
	Technical article	Identify the most accurate linear voltage regulator	PDF \| HTML	2015/08/22
	Application note	AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B)		2013/05/06
	Application note	AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A)		2013/05/06
	Application note	AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B)		2013/05/06
	Application note	AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B)		2013/05/05
	Application note	Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A)		2013/05/05
	More literature	Die D/S LM317A MWC 3-Terminal Adj Regulator		2012/09/20
	Application note	Packaging Limits Range of Linear Regulators		2010/05/08
	Application note	Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A)		2008/06/04
	Application note	Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems		2002/10/03
	Application note	Understanding the Terms and Definitions of LDO Voltage Regulators		1999/10/21

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평가 보드

LM317A-337N-EVM — 3핀 조정 가능 레귤레이터 평가 모듈

The LM317A-337N-EVM demonstrates canonical application of the LM317A adjustable regulator and its negative complement, the LM337-N. The evaluation module (EVM) is assesmbled with the SOT-223 package option for each device, supplying up to 1 A of load current. The EVM is designed for easy (...)

사용 설명서: PDF