전원 관리 선형 및 저손실(LDO) 레귤레이터

LM317M

활성

500mA, 40V, 조정 가능 전압 레귤레이터

제품 상세 정보

Output options Adjustable Output Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 3.75 Vout (max) (V) 37 Vout (min) (V) 1.2 Rating Catalog Noise (µVrms) 38 PSRR at 100 KHz (dB) 22 Iq (typ) (mA) 5 Thermal resistance θJA (°C/W) 60 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
Output options Adjustable Output Iout (max) (A) 0.5 Vin (max) (V) 40 Vin (min) (V) 3.75 Vout (max) (V) 37 Vout (min) (V) 1.2 Rating Catalog Noise (µVrms) 38 PSRR at 100 KHz (dB) 22 Iq (typ) (mA) 5 Thermal resistance θJA (°C/W) 60 Load capacitance (min) (µF) 0 Regulated outputs (#) 1 Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 2000 Operating temperature range (°C) -40 to 125
SOT-223 (DCY) 4 45.5 mm² 6.5 x 7 TO-252 (KVU) 3 66.726 mm² 6.6 x 10.11
  • Output Voltage Range Adjustable
    from 1.25-V to 37-V
  • Output Current Greater Than 500-mA
  • Internal Short-Circuit Current Limiting
  • Thermal-Overload Protection
  • Output Safe-Area Compensation
  • Q Devices Meet Automotive Performance Requirements
  • Customer-Specific Configuration Control Can Be Supported for Q Devices Along With
    Major-Change Approval
  • Output Voltage Range Adjustable
    from 1.25-V to 37-V
  • Output Current Greater Than 500-mA
  • Internal Short-Circuit Current Limiting
  • Thermal-Overload Protection
  • Output Safe-Area Compensation
  • Q Devices Meet Automotive Performance Requirements
  • Customer-Specific Configuration Control Can Be Supported for Q Devices Along With
    Major-Change Approval

The LM317M is an adjustable 3-terminal positive voltage regulator capable of supplying more than 500-mA over an output-voltage range of 1.25-V to
37-V. The LM317M is exceptionally easy to use and requires only two external resistors to set the output. Furthermore, both line and load regulation are better than standard fixed regulators.

In addition to having higher performance than fixed regulators, the LM317M includes on-chip current limiting, thermal-overload protection, and safe- operating-area protection. All overload protection remains fully functional if the ADJUST terminal is disconnected.

The LM317 is a floating regulator meaning there is no device ground terminal. Quiescent current flows to the load instead of being wasted flowing to ground. Regulated output voltage of hundreds of volts is possible if the maximum input to output differential does not exceed 40-V at any time. Device can be used as a floating current source controlled by a single resistor.

Normally, no capacitors are needed unless the device is more than six inches from the input filter capacitors, in which case an input bypass capacitor of any type is needed. An optional electrolytic or tantalum output capacitor can be added to improve transient response. Ceramic output capacitors can be used but output ringing may be present on transients. The ADJUST terminal can be bypassed with any type of capacitor to achieve high ripple-rejection ratios, which are difficult to achieve with standard three-terminal regulators.

The LM317M is an adjustable 3-terminal positive voltage regulator capable of supplying more than 500-mA over an output-voltage range of 1.25-V to
37-V. The LM317M is exceptionally easy to use and requires only two external resistors to set the output. Furthermore, both line and load regulation are better than standard fixed regulators.

In addition to having higher performance than fixed regulators, the LM317M includes on-chip current limiting, thermal-overload protection, and safe- operating-area protection. All overload protection remains fully functional if the ADJUST terminal is disconnected.

The LM317 is a floating regulator meaning there is no device ground terminal. Quiescent current flows to the load instead of being wasted flowing to ground. Regulated output voltage of hundreds of volts is possible if the maximum input to output differential does not exceed 40-V at any time. Device can be used as a floating current source controlled by a single resistor.

Normally, no capacitors are needed unless the device is more than six inches from the input filter capacitors, in which case an input bypass capacitor of any type is needed. An optional electrolytic or tantalum output capacitor can be added to improve transient response. Ceramic output capacitors can be used but output ringing may be present on transients. The ADJUST terminal can be bypassed with any type of capacitor to achieve high ripple-rejection ratios, which are difficult to achieve with standard three-terminal regulators.

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new 대안 비교
비교 대상 장치와 동일한 기능을 지원하는 핀 대 핀
LM317MQ 활성 차량 애플리케이션용 500mA, 40V, 조정 가능 선형 전압 레귤레이터 Pin-to-pin equivalent for automotive applications
다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능
UA78M 활성 500mA 35V 선형 전압 레귤레이터 Improved PSRR, 30V input max with fixed output options

기술 자료

star =TI에서 선정한 이 제품의 인기 문서
검색된 결과가 없습니다. 검색어를 지우고 다시 시도하십시오.
6개 모두 보기
유형 직함 날짜
* Data sheet LM317M 3-Terminal Adjustable Regulator datasheet (Rev. P) 2014/03/31
Application note LDO Noise Demystified (Rev. B) PDF | HTML 2020/08/18
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017/08/09
Application note Method For Cal Output Voltage Tolerances in Adj Regs (Rev. A) 2013/05/05
Application note A New Production Technique for Trimming Voltage Regulators 2002/10/03
Application note Adjustable 3-Terminal Regulator for Low-Cost Battery Charging Systems 2002/10/03

설계 및 개발

추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.

평가 보드

MLTLDO2EVM-037 — DCY, DDA 및 KVU 패키지용 범용 LDO 선형 전압 레귤레이터 평가 모듈

엔지니어들은 MLTLDO2EVM-037 멀티패키지 저 드롭아웃(LDO) 평가 모듈(EVM)을 이용해 자체 회로 애플리케이션의 가능한 사용 용도로 여러 일반 패키지의 선형 레귤레이터의 작동과 성능을 평가할 수 있습니다. 이 EVM 구성에는 엔지니어가 부품을 솔더 및 평가할 수 있도록 DDA, 3핀 및 5핀 KVU, DCY 패키지 풋프린트가 포함되어 있습니다.

사용 설명서: PDF
TI.com에서 구매 불가
패키지 CAD 기호, 풋프린트 및 3D 모델
SOT-223 (DCY) 4 Ultra Librarian
TO-252 (KVU) 3 Ultra Librarian

주문 및 품질

포함된 정보:
  • RoHS
  • REACH
  • 디바이스 마킹
  • 납 마감/볼 재질
  • MSL 등급/피크 리플로우
  • MTBF/FIT 예측
  • 물질 성분
  • 인증 요약
  • 지속적인 신뢰성 모니터링
포함된 정보:
  • 팹 위치
  • 조립 위치

권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.

지원 및 교육

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