LM317A

활성

높은 정확도의 1.5A, 40V, 조정 가능 선형 전압 레귤레이터

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데이터 시트

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

LM317A

활성

데이터 시트

지금 주문하기

제품 상세 정보

Rating

Catalog, Military

Vin (max) (V)

40

Vin (min) (V)

3

Iout (max) (A)

1.5

Output options

Adjustable Output, Fixed Output

Vout (max) (V)

37

Vout (min) (V)

1.2

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

Rating

Catalog, Military

Vin (max) (V)

40

Vin (min) (V)

3

Iout (max) (A)

1.5

Output options

Adjustable Output, Fixed Output

Vout (max) (V)

37

Vout (min) (V)

1.2

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 mm × 7 mm)

TO-252 (NDP)

3

65.2078 mm² (6.58 mm × 9.91 mm)

TO-CAN (NDT)

3

91.6742 mm² (10.03 mm × 9.14 mm)

TO-220 (NDE)

3

46.5328 mm² (10.16 mm × 4.58 mm)

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 비디오

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

검색된 결과가 없습니다. 검색어를 지우고 다시 시도하세요.

14개 모두 보기

상위 문서	유형	직함	형식 옵션	날짜
*	데이터 시트	LM317A 1% Accurate 1.5A Adjustable Voltage Regulator datasheet (Rev. A)	PDF \| HTML	2020. 6. 9
	애플리케이션 노트	A Topical Index of TI LDO Application Notes (Rev. F)		2019. 6. 27
	기술 문서	Create a simple LED driver	PDF \| HTML	2015. 10. 20
	기술 문서	Overview of voltage regulator packaging	PDF \| HTML	2015. 8. 27
	기술 문서	Identify the most accurate linear voltage regulator	PDF \| HTML	2015. 8. 22
	애플리케이션 노트	AN-1148 Linear Regulators: Theory of Operation and Compensation (Rev. B)		2013. 5. 6
	애플리케이션 노트	AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B)		2013. 5. 6
	애플리케이션 노트	AN-103 LM340 Series Three Terminal Positive Regulators (Rev. A)		2013. 5. 6
	애플리케이션 노트	AN-182 Improving Power Supply Reliability with IC Power Regulators (Rev. B)		2013. 5. 5
	애플리케이션 노트	Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A)		2013. 5. 5
	애플리케이션 노트	Packaging Limits Range of Linear Regulators		2010. 5. 8
	애플리케이션 노트	Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A)		2008. 6. 4
	애플리케이션 노트	Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems		2002. 10. 3
	애플리케이션 노트	Understanding the Terms and Definitions of LDO Voltage Regulators		1999. 10. 21

설계 및 개발

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평가 보드

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

LM317A-337N-EVM은 LM317A 조정 가능한 레귤레이터와 음극 보수인 LM337-N의 정식 애플리케이션을 보여줍니다. EVM(평가 모듈)은 각 장치의 SOT-223 패키지 옵션과 함께 조립되어 최대 1A의 부하 전류를 공급합니다. 이 EVM은 1.5A 작동을 위해 장치의 TO-220 버전을 채우도록 쉽게 수정할 수 있습니다. 이 EVM은 개인 커패시터 선택을 위한 충분한 풋프린트 공간과 4개의 구리 레이어, 히트 싱크 공간이 있어 탁월한 전력 손실을 구현할 수 있습니다.

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