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

LM7705

활성

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지금 주문
데이터시트

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LM7705

활성
데이터시트 지금 주문

제품 상세 정보

Iout (max) (A) 0.026 Vin (min) (V) 3 Vin (max) (V) 5.25 Type Charge pump, Converter Switching frequency (min) (kHz) 92 Switching frequency (max) (kHz) 92 Features Enable, Synchronous Rectification Vout (min) (V) -0.232 Vout (max) (V) -0.232 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000078
Iout (max) (A) 0.026 Vin (min) (V) 3 Vin (max) (V) 5.25 Type Charge pump, Converter Switching frequency (min) (kHz) 92 Switching frequency (max) (kHz) 92 Features Enable, Synchronous Rectification Vout (min) (V) -0.232 Vout (max) (V) -0.232 Rating Catalog Operating temperature range (°C) -40 to 125 Iq (typ) (A) 0.000078
VSSOP (DGK) 8 14.7 mm² 3 x 4.9
  • Regulated Output Voltage −0.232 V
  • Output Voltage Tolerance 5%
  • Output Voltage Ripple 4 mVPP
  • Supply Voltage 3 V to 5.25 V
  • Conversion Efficiency Up to 98%
  • Quiescent Current 78 µA
  • Shutdown Current 20 nA
  • Turnon Time 500 µs
  • Operating Temperature Range −40°C to 125°C
  • 8-Pin VSSOP Package
  • Regulated Output Voltage −0.232 V
  • Output Voltage Tolerance 5%
  • Output Voltage Ripple 4 mVPP
  • Supply Voltage 3 V to 5.25 V
  • Conversion Efficiency Up to 98%
  • Quiescent Current 78 µA
  • Shutdown Current 20 nA
  • Turnon Time 500 µs
  • Operating Temperature Range −40°C to 125°C
  • 8-Pin VSSOP Package

The LM7705 device is a switched capacitor voltage inverter with a low noise, −0.23 V fixed negative voltage regulator. This device is designed to be used with low voltage amplifiers to enable the amplifiers output to swing to zero volts. The −0.23 V is used to supply the negative supply pin of an amplifier while maintaining less then 5.5 V across the amplifier. Rail-to-Rail output amplifiers cannot output zero volts when operating from a single-supply voltage and can result in error accumulation due to amplifier output saturation voltage being amplified by following gain stages. A small negative supply voltage will prevent the amplifiers output from saturating at zero volts and will help maintain an accurate zero through a signal processing chain. Additionally, when an amplifier is used to drive an input of the ADC, the amplifier can output a zero voltage signal and the full input range of an ADC can be used. The LM7705 device has a shutdown pin to minimize standby power consumption.

The LM7705 device is a switched capacitor voltage inverter with a low noise, −0.23 V fixed negative voltage regulator. This device is designed to be used with low voltage amplifiers to enable the amplifiers output to swing to zero volts. The −0.23 V is used to supply the negative supply pin of an amplifier while maintaining less then 5.5 V across the amplifier. Rail-to-Rail output amplifiers cannot output zero volts when operating from a single-supply voltage and can result in error accumulation due to amplifier output saturation voltage being amplified by following gain stages. A small negative supply voltage will prevent the amplifiers output from saturating at zero volts and will help maintain an accurate zero through a signal processing chain. Additionally, when an amplifier is used to drive an input of the ADC, the amplifier can output a zero voltage signal and the full input range of an ADC can be used. The LM7705 device has a shutdown pin to minimize standby power consumption.
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기술 문서

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모두 보기7
유형 직함 날짜
* Data sheet LM7705 Low-Noise Negative Bias Generator datasheet (Rev. D) PDF | HTML 2018/05/08
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 2022/05/23
Technical article How to achieve microvoltage-level precision in thermopile applications PDF | HTML 2021/12/09
Circuit design Charge pump circuit (–0.3V) for negative amplifier supply 2019/06/16
Application note Attenuator Amplifier Design to Maximize the Input Voltage of Differential ADCs 2018/06/14
Technical article Unique active mux capability combines buffer and switch into one solution PDF | HTML 2017/10/10
EVM User's guide AN-1883 LM7705 Evaluation Board (Rev. B) 2013/05/03

설계 및 개발

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패키지 핀 다운로드
VSSOP (DGK) 8 옵션 보기
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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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