홈 전원 관리 AC/DC & DC/DC converters (integrated FET)
홈
전원 관리
AC/DC & DC/DC converters (integrated FET)

LM2771

활성

낮은 리플 250mA 스위치드 커패시터 스텝다운 DC/DC 레귤레이터

지금 주문
데이터시트

LM2771

활성
데이터시트 지금 주문

제품 상세 정보

Iout (max) (A) 0.25 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Type Charge pump Switching frequency (min) (kHz) 800 Switching frequency (max) (kHz) 1400 Features Adjustable current limit Vout (min) (V) 1.5 Vout (max) (V) 1.5 Rating Catalog Operating temperature range (°C) -30 to 110 Iq (typ) (A) 0.000045
Iout (max) (A) 0.25 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Type Charge pump Switching frequency (min) (kHz) 800 Switching frequency (max) (kHz) 1400 Features Adjustable current limit Vout (min) (V) 1.5 Vout (max) (V) 1.5 Rating Catalog Operating temperature range (°C) -30 to 110 Iq (typ) (A) 0.000045
WSON (DSC) 10 9 mm² 3 x 3
  • Low-Noise Fixed Frequency Operation
  • 1.5V Output Voltage
  • Li-Ion (3.6V) to 1.5V with 81% Efficiency
  • 1.7% Output Voltage Accuracy
  • Very Low Output Ripple: 8mV @ 250mA
  • Output Currents up to 250mA
  • 2.7V to 5.5V Input Range
  • Shutdown Disconnects Load from VIN
  • 1.1MHz Switching Frequency
  • No Inductors…Small Solution Size
  • Current Limit and Thermal Protection
  • WSON-10 Package (3mm × 3mm × 0.8mm)

All trademarks are the property of their respective owners.

  • Low-Noise Fixed Frequency Operation
  • 1.5V Output Voltage
  • Li-Ion (3.6V) to 1.5V with 81% Efficiency
  • 1.7% Output Voltage Accuracy
  • Very Low Output Ripple: 8mV @ 250mA
  • Output Currents up to 250mA
  • 2.7V to 5.5V Input Range
  • Shutdown Disconnects Load from VIN
  • 1.1MHz Switching Frequency
  • No Inductors…Small Solution Size
  • Current Limit and Thermal Protection
  • WSON-10 Package (3mm × 3mm × 0.8mm)

All trademarks are the property of their respective owners.

The LM2771 is a switched capacitor step-down regulator that produces a 1.5V output without the use of an inductor. It is capable of supplying loads up to 250mA. The LM2771 operates with an input voltage from 2.7V to 5.5V, and requires only 3 low-cost ceramic capacitors.

The LM2771 uses a regulated 0.5x charge pump to give power conversion efficiencies nearly twice as high as an LDO. Pre-regulated 1.1MHz fixed-frequency switching results in very low ripple and noise on both the input and the output. When output currents are low (<30mA typ.), the part automatically switches to a low-ripple PFM regulation mode to maintain high efficiency over the entire load range. At input voltages below 3.5V (Typ), the charge pump goes into pass mode, with efficiencies similar to an LDO.

The LM2771 is a switched capacitor step-down regulator that produces a 1.5V output without the use of an inductor. It is capable of supplying loads up to 250mA. The LM2771 operates with an input voltage from 2.7V to 5.5V, and requires only 3 low-cost ceramic capacitors.

The LM2771 uses a regulated 0.5x charge pump to give power conversion efficiencies nearly twice as high as an LDO. Pre-regulated 1.1MHz fixed-frequency switching results in very low ripple and noise on both the input and the output. When output currents are low (<30mA typ.), the part automatically switches to a low-ripple PFM regulation mode to maintain high efficiency over the entire load range. At input voltages below 3.5V (Typ), the charge pump goes into pass mode, with efficiencies similar to an LDO.
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기술 문서

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모두 보기6
유형 직함 날짜
* Data sheet LM2771 Low-Ripple 250mA Switched Capacitor Step-Down DC/DC Converter datasheet (Rev. A) 2013/05/01
Selection guide Power Management Guide 2018 (Rev. R) 2018/06/25
Technical article Charge pumps: An often unconsidered method of DC/DC conversion PDF | HTML 2015/07/17
Technical article Charge pump, inductor-based converter or LDO? PDF | HTML 2015/06/19
White paper The Forgotten Converter 2015/06/15
EVM User's guide AN-1547 LM2771 Evaluation Board (Rev. A) 2013/04/30

설계 및 개발

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

패키지 핀 다운로드
WSON (DSC) 10 옵션 보기
TI의 평가 항목에 대한 표준 약관이 적용됩니다.

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

지원 및 교육

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포럼 주제 모두 보기(영문)

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