전원 관리 선형 및 저손실(LDO) 레귤레이터

LP2951

활성

100mA, 30V, 저손실 전압 레귤레이터(전원 양호 및 활성화 지원)

제품 상세 정보

Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2 Vout (max) (V) 29 Vout (min) (V) 1.2 Fixed output options (V) 3, 3.3, 5 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 57 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 52, 97 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
Output options Adjustable Output, Fixed Output Iout (max) (A) 0.1 Vin (max) (V) 30 Vin (min) (V) 2 Vout (max) (V) 29 Vout (min) (V) 1.2 Fixed output options (V) 3, 3.3, 5 Rating Catalog Noise (µVrms) 160 PSRR at 100 KHz (dB) 57 Iq (typ) (mA) 0.075 Thermal resistance θJA (°C/W) 52, 97 Load capacitance (min) (µF) 1 Regulated outputs (#) 1 Features Enable, Power good Accuracy (%) 3 Dropout voltage (Vdo) (typ) (mV) 380 Operating temperature range (°C) -40 to 125
SOIC (D) 8 29.4 mm² 4.9 x 6 WSON (DRG) 8 9 mm² 3 x 3
  • Wide input voltage range
    • VIN range : 2V to 30V
  • Wide output voltage range VOUT
    • Fixed option: 3V (legacy Chip), 3.3V, 5.0V
    • Adjustable option: 1.2V to 29V
  • Output current: 100mA
  • VOUT accuracy:
    • ±2% over line, load, and temperature (legacy chip)
    • ±1% over line, load, and temperature (new chip)
  • Quiescent current IQ (new chip): 50µA (typical)
  • Low dropout (new chip):: 340mV (typical)
  • Output current limiting and thermal shutdown
  • Stable over a wide range of ceramic output capacitor values
    • COUT range: 1µF to 100µF (new chip)
    • ESR range: 0 to 2Ω (new chip)
  • Operating junction temperature: –40°C to 125°C
  • Package option:
    • LP (3-pin TO-92)
    • D (8-pin SOIC)
    • DRG (8-pin WSON)
  • Wide input voltage range
    • VIN range : 2V to 30V
  • Wide output voltage range VOUT
    • Fixed option: 3V (legacy Chip), 3.3V, 5.0V
    • Adjustable option: 1.2V to 29V
  • Output current: 100mA
  • VOUT accuracy:
    • ±2% over line, load, and temperature (legacy chip)
    • ±1% over line, load, and temperature (new chip)
  • Quiescent current IQ (new chip): 50µA (typical)
  • Low dropout (new chip):: 340mV (typical)
  • Output current limiting and thermal shutdown
  • Stable over a wide range of ceramic output capacitor values
    • COUT range: 1µF to 100µF (new chip)
    • ESR range: 0 to 2Ω (new chip)
  • Operating junction temperature: –40°C to 125°C
  • Package option:
    • LP (3-pin TO-92)
    • D (8-pin SOIC)
    • DRG (8-pin WSON)

The LP2951 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and can supply up to 100mA of load current. The LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 gives 3.3V or 5V fixed output voltages. Alternatively, leave the SENSE and VTAP pins open and connect FEEDBACK to an external resistor divider. This configuration allows the output to be set to any value between 1.2V to 29V.

The LP2951-Q1 has a ERROR output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The SHUTDOWN input and ERROR output are used for sequencing multiple power supplies in the system.

The LP2951 is a wide input low-dropout regulator (LDO) supporting an input voltage range from 2V to 30V and can supply up to 100mA of load current. The LP2951 is able to output either a fixed or adjustable output from the same device. By tying the OUTPUT and SENSE pins together, and the FEEDBACK and VTAP pins together, the LP2951 gives 3.3V or 5V fixed output voltages. Alternatively, leave the SENSE and VTAP pins open and connect FEEDBACK to an external resistor divider. This configuration allows the output to be set to any value between 1.2V to 29V.

The LP2951-Q1 has a ERROR output that monitors the voltage at the feedback pin to indicate the status of the output voltage. The SHUTDOWN input and ERROR output are used for sequencing multiple power supplies in the system.

다운로드 스크립트와 함께 비디오 보기 동영상

관심 가지실만한 유사 제품

open-in-new 대안 비교
다른 핀 출력을 지원하지만 비교 대상 장치와 동일한 기능
TPS709 활성 역전류 방지 및 활성화를 지원하는 150mA, 30V, 초저 IQ, 저손실 전압 레귤레이터 Improved IQ (1uA)
TPS7A25 활성 전원 양호 기능을 지원하는 300mA, 18V, 초저 IQ, 고정밀, 조정 가능한 저손실 전압 레귤레이터 This is a higher output (300-mA) LDO with power good and lower IQ (2.5 μA)
신규 TPS7B91 활성 150mA 40V 1.5μA IQ 저손실 선형 레귤레이터 Increased voltage range up to 40V

기술 자료

star =TI에서 선정한 이 제품의 인기 문서
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34개 모두 보기
유형 직함 날짜
* Data sheet LP295x 100-mA, 30-V, adjustable voltage regulator with shutdown datasheet (Rev. K) PDF | HTML 2024/12/13
Application note L1 and L2 EV Charger Electric Vehicle Service Equipment Design Considerations (Rev. B) 2021/06/09
Application note LDO Noise Demystified (Rev. B) PDF | HTML 2020/08/18
Application note ESR, Stability, and the LDO Regulator (Rev. A) 2020/01/07
Application note A Topical Index of TI LDO Application Notes (Rev. F) 2019/06/27
Application note Fundamental Theory of PMOS LDO Voltage Regulators (Rev. A) 2018/08/17
EVM User's guide LP2951 EVM User's Guide (Rev. A) 2018/01/05
Application note LDO PSRR Measurement Simplified (Rev. A) PDF | HTML 2017/08/09
Technical article How to use an LDO as a load switch PDF | HTML 2016/02/01
Technical article Two ways LDOs save power in the IoT PDF | HTML 2015/08/17
Technical article How to use an LDO to protect a power source PDF | HTML 2015/07/25
Application note A Topical Index of TI Supply Voltage Supervisor (SVS) Application Notes 2015/06/15
Analog Design Journal Techniques for accurate PSRR measurements 2013/10/28
Application note AN-1028 Maximum Power Enhancement Techniques for Power Packages (Rev. B) 2013/05/06
Application note AN-1482 LDO Regulator Stability Using Ceramic Output Capacitors (Rev. A) 2013/04/25
Application note AN-1815 LDOs Ease the Stress of Start-Up (Rev. A) 2013/04/24
Application note AN-1061 Power Conversion in Line-Powered Equipment (Rev. B) 2013/04/23
Application note AN-1950 Silently Powering Low Noise Applications (Rev. A) 2013/04/22
Application note LDO Performance Near Dropout 2010/10/08
Application note 3.6V – 5.5V Input, LDO Reference Design for MSP430 (Rev. A) 2010/06/14
Application note 3.6V – 5.5V Input, LDO with Dual-Level Output Reference Design for MSP430 (Rev. A) 2010/06/14
Application note Packaging Limits Range of Linear Regulators 2010/05/08
Application note Simple Power Solution Using LDOs for the DM365 (Rev. A) 2009/09/11
Application note Digital Designer's Guide to Linear Voltage Regulators & Thermal Mgmt (LDO) (Rev. A) 2008/06/04
Application note Low-Voltage Current Loop Transmitter 2007/08/02
Application note Battery Charging 2007/03/21
Application note Linear and Switching Voltage Regulator Fundamental Part 1 2007/03/21
Application note Ceramic Capacitors Replace Tantalum Capacitors in LDOs (Rev. A) 2006/10/13
Application note Understanding LDO Dropout 2005/05/09
White paper Versatility of the LM5030 PWM Push-Pull Controller 2003/12/01
Application note Extending the Input Voltage Range of an LDO Regulator 2002/08/16
Application note Understanding the Terms and Definitions of LDO Voltage Regulators 1999/10/21
Application note Technical Review of Low Dropout Voltage Regulator Operation And Performance 1999/08/30
Application brief Low Power 150-mA LDO Linear Regulators. Extended Output Voltage Adjustment Range 1999/06/11

설계 및 개발

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

평가 보드

LP2951EVM — LP2951 고정/조정 가능 마이크로파워 저손실(LDO) 레귤레이터 평가 모듈

The LP2951 devices are bipolar low-dropout (LDO) voltage regulators that can accommodate a wide input supply-voltage range of up to 30 V with an output load up to 100 mA. The LP2951EVM allows for flexibility in design, allowing the user to add or remove input and output capacitors, as well as (...)
사용 설명서: PDF
TI.com에서 구매 불가
시뮬레이션 모델

LP2951 PSpice Transient Model (Rev. A)

SNVM037A.ZIP (23 KB) - PSpice Model
시뮬레이션 모델

LP2951 Unencrypted PSpice Transient Model

SNVMAO3.ZIP (1 KB) - PSpice Model
레퍼런스 디자인

TIDA-010025 — 옵토 에뮬레이트 입력 게이트 드라이버를 갖춘 200~480 VAC 드라이브를 위한 3상 인버터 게이트 레퍼런스 설계

This reference design realizes a reinforced isolated three-phase inverter subsystem using isolated IGBT gate drivers and isolated current/voltage sensors. The UCC23513 gate driver used has a 6-pin wide body package with optical LED emulated inputs which enables its use as pin-to-pin replacement to (...)
Design guide: PDF
회로도: PDF
레퍼런스 디자인

PMP31179 — 400W AC/DC 항공용 레퍼런스 설계

400Hz ~ 800Hz 범위의 주전원 주파수에서 작동하는 항공 애플리케이션을 위한 소형 30V DC, 400W 레퍼런스 설계입니다. UCC28064A에 기반한 2상 인터리브 전환 모드(TM) PFC(역률 보정)는 전력 역률을 수정하고 입력 전류의 고조파 콘텐츠를 최소화하는 데 사용됩니다. DC/DC는 UCC256404로 HB-LLC 단계를 사용하여 구현됩니다. 효율성은 보조 측에서 동기식 정류를 사용하여 더욱 향상됩니다.
Test report: PDF
레퍼런스 디자인

TIDA-010076 — 단일 페어 이더넷(T1)을 통해 데이지 체인으로 연결된 전력 및 데이터 레퍼런스 설계

The TIDA-010076 shows the transfer of 220-W power and 100-Mbit/s data over SPE. Communication systems in daisy-chain topology need significantly less hardware and wiring than conventional systems in star-topology. When combined with single-pair Ethernet (SPE, 100BASE-T1) and power over data line, (...)
Design guide: PDF
회로도: PDF
레퍼런스 디자인

PMP21872 — 소형 폼 팩터 12Vin, 1Vout 40A 듀얼 위상 동기 벅 레퍼런스 설계

This reference design is a dual-phase synchronous buck solution using TPS53622 controller with two CSD95490Q5MC power-stage ICs. It takes a 12-V input and converts it to 1-V out at 40 A; 20 A per phase.
Test report: PDF
회로도: PDF
레퍼런스 디자인

PMP20852 — 3W 절연 삼중 출력 플라이백 컨버터 레퍼런스 설계

PMP20852 is an isolated flyback converter reference design with primary-side regulation using the UCC2805 controller IC. There are three independently isolated outputs on the secondary side, each of which use LP2951 linear regulators to provide a well-regulated 16V output on each of the three (...)
Test report: PDF
회로도: PDF
패키지 CAD 기호, 풋프린트 및 3D 모델
SOIC (D) 8 Ultra Librarian
WSON (DRG) 8 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

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