Inicio Gestión de la energía AC/DC & DC/DC converters (integrated FET)
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Gestión de la energía
AC/DC & DC/DC converters (integrated FET)

LM27761

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Inversor regulado de bajo ruido con LDO integrado

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LM27761

ACTIVO
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Detalles del producto

Iout (max) (A) 0.25 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Type Charge pump Switching frequency (min) (kHz) 1700 Switching frequency (max) (kHz) 2300 Features Enable, Integrated LDO, Light Load Efficiency Mode, Output discharge, Synchronous Rectification, UVLO Fixed Vout (min) (V) -5.2 Vout (max) (V) -1.5 Rating Catalog Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00037
Iout (max) (A) 0.25 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Type Charge pump Switching frequency (min) (kHz) 1700 Switching frequency (max) (kHz) 2300 Features Enable, Integrated LDO, Light Load Efficiency Mode, Output discharge, Synchronous Rectification, UVLO Fixed Vout (min) (V) -5.2 Vout (max) (V) -1.5 Rating Catalog Operating temperature range (°C) -40 to 85 Iq (typ) (A) 0.00037
WSON (DSG) 8 4 mm² 2 x 2
  • Inverts and Regulates the Input Supply Voltage
  • Low Output Ripple
  • Shutdown Lowers Quiescent Current to 7 µA (Typical)
  • Up to 250-mA Output Current
  • 2.5-Ω Inverter Output Impedance, VIN = 5 V
  • ±4% Regulation at Peak Load
  • 370-µA Quiescent Current
  • 2-MHz (Typical) Low-Noise Fixed-Frequency Operation
  • 35-dB (Typical) LDO PSRR at 2 MHz
    With 80-mA Load Current
  • 30-mV LDO Dropout Voltage at 100 mA,
    VOUT = –5 V
  • Current Limit and Thermal Protection
  • Create a Custom Design Using the LM27761 With the WEBENCH® Power Designer
  • Inverts and Regulates the Input Supply Voltage
  • Low Output Ripple
  • Shutdown Lowers Quiescent Current to 7 µA (Typical)
  • Up to 250-mA Output Current
  • 2.5-Ω Inverter Output Impedance, VIN = 5 V
  • ±4% Regulation at Peak Load
  • 370-µA Quiescent Current
  • 2-MHz (Typical) Low-Noise Fixed-Frequency Operation
  • 35-dB (Typical) LDO PSRR at 2 MHz
    With 80-mA Load Current
  • 30-mV LDO Dropout Voltage at 100 mA,
    VOUT = –5 V
  • Current Limit and Thermal Protection
  • Create a Custom Design Using the LM27761 With the WEBENCH® Power Designer

The LM27761 low-noise regulated switched-capacitor voltage inverter delivers a very low-noise adjustable output for an input voltage in the range of 2.7 V to 5.5 V. Four low-cost capacitors are used in the application solution to provide up to 250 mA of output current. The regulated output for the device is adjustable between −1.5 V and −5 V. The LM27761 operates at 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 370 µA (charge-pump power efficiency greater than 80% with most loads) and 7-µA typical shutdown current, the LM27761 provides ideal performance when driving power amplifiers, DAC bias rails, and other high-current, low-noise voltage applications.

The LM27761 low-noise regulated switched-capacitor voltage inverter delivers a very low-noise adjustable output for an input voltage in the range of 2.7 V to 5.5 V. Four low-cost capacitors are used in the application solution to provide up to 250 mA of output current. The regulated output for the device is adjustable between −1.5 V and −5 V. The LM27761 operates at 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. With an operating current of only 370 µA (charge-pump power efficiency greater than 80% with most loads) and 7-µA typical shutdown current, the LM27761 provides ideal performance when driving power amplifiers, DAC bias rails, and other high-current, low-noise voltage applications.
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Documentación técnica

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Tipo Título Fecha
* Data sheet LM27761 Low-Noise, Regulated, Switched-Capacitor Voltage Inverter datasheet (Rev. C) PDF | HTML 25 ene 2017
Application note Quick Reference Guide To TI Buck Switching DC/DC Application Notes (Rev. B) PDF | HTML 23 may 2022
Technical article Low-noise charge pumps make it easy to create negative voltages PDF | HTML 30 ago 2017
Technical article The top three ways to split a voltage rail to a bipolar supply PDF | HTML 27 dic 2016
Technical article Pump it up quietly PDF | HTML 19 feb 2016
EVM User's guide Using the LM27761EVM Evaluation Module 04 dic 2015
White paper The Forgotten Converter 15 jun 2015

Diseño y desarrollo

Para conocer los términos adicionales o los recursos necesarios, haga clic en cualquier título de abajo para ver la página de detalles cuando esté disponible.

Placa de evaluación

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Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

DAC38RF82EVM — Módulo de evaluación DAC PLL DAC38RF82 de doble canal, 14 bits, 9-GSPS, 1x-24x de interpolación, 6 y

The DAC38RF82EVM is the circuit board for evaluating DAC38RF82/83/85/93 digital to analog converters (DACs). The EVM can be used to evaluate the performance of the DAC up to 9GSPS sampling rate and it is designed to work with the TSW14J56 EVM. The available FMC connector also makes it possible to (...)
Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

DAC38RF89EVM — Módulo de evaluación DAC38RF89 para DAC PLL de doble canal, 14 bits, 8,4 GSPS, 1x-24x de interpolaci

The DAC38RF89 evaluation module (EVM) is the circuit board for evaluating DAC38RF89 digital-to-analog converters (DACs). The DAC38RFEVM can be used to evaluate the performance of the DAC up to 9-GSPS sampling rate and is designed to work with the TSW14J56EVM (Rev B and up). The available FMC (...)

Guía del usuario: PDF
No disponible en TI.com
Placa de evaluación

LM27761EVM — Módulo de evaluación de inversor con bomba de carga regulado (LM27761)

The LM27761EVM aids in evaluation of the LM27761 Regulated Charge Pump Inverter.  The 2MHz switched capacitor boost provides up to 250 mA of output current utilizing few external components.  With a low current PFM or ECO mode, the LM27761 draws a minimal load from the power supply when (...)

Guía del usuario: PDF
No disponible en TI.com
Modelo de simulación

LM27761 Unencrypted PSpice Transient Model Package (Rev. A)

SNVMAK0A.ZIP (84 KB) - PSpice Model
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Diseños de referencia

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This reference design provides an efficient power supply scheme to power-up the RF-sampling DAC38RF8x digital-to-analog data converter (DAC) without sacrificing performance and also reduces board area and BOM. The reference design uses both DC/DC switchers and an LDO to power-up the DAC38RF8x (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-01240 — Diseño de referencia del transmisor de radar de banda S de muestreo de RF

Synthesis of waveforms appropriate for an S-band multifunction phased array radar (MPAR) is demonstrated with an RF sampling architecture utilizing the DAC38RF80, a 9GSPS 16-bit digital-to-analog converter (DAC). The RF sampling transmit architecture simplifies the signal chain, bringing the data (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-01435 — Diseño de referencia Zero-IF de alto ancho de banda para backhaul de microondas

The TSW40RF82EVM reference design provides a platform to interface the DAC38RF82 with a high-performance modulator - the TRF370417EVM. The TRF370417EVM can modulate wideband signals at up to 6 GHz as would be typical for a microwave backhaul application. The TRF370417 device may be substituted for (...)
Design guide: PDF
Esquema: PDF
Diseños de referencia

TIDA-01084 — Generador multitono de onda continua alineado por fase: Diseño de referencia DAC de muestreo de RF d

The TIDA-01084 reference design demonstrates the use of RF sampling DAC to generate continuous phase-aligned multitone waveforms. With four 48-bit independent NCOs, the 14-bit, 9GSPS DAC38RF83 can generate four CW tones placed anywhere within the first Nyquist zone or up to 6 GHz in the second.

This (...)

Design guide: PDF
Esquema: PDF
Paquete Pasadores Descargar
WSON (DSG) 8 Ver opciones
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Pedidos y calidad

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  • REACH
  • Marcado del dispositivo
  • Acabado de plomo/material de la bola
  • Clasificación de nivel de sensibilidad a la humedad (MSL) / reflujo máximo
  • Estimaciones de tiempo medio entre fallas (MTBF)/fallas en el tiempo (FIT)
  • Contenido del material
  • Resumen de calificaciones
  • Monitoreo continuo de confiabilidad
Información incluida:
  • Lugar de fabricación
  • Lugar de ensamblaje

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