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Product details

Parameters

Vin (Min) (V) 2.7 Vin (Max) (V) 5.5 Vout (Min) (V) -5 Vout (Max) (V) 5 Iout (Max) (A) 0.25 Regulated outputs (#) 2 Switching frequency (Min) (kHz) 1800 Switching frequency (Max) (kHz) 2200 Iq (Typ) (mA) 0.39 Features Enable, Integrated LDO, Light Load Efficiency Mode, Multiple Outputs, Output Discharge, Power Good, Synchronous Rectification Operating temperature range (C) -40 to 85 Type Charge Pump Rating Catalog open-in-new Find other Charge pumps (inductorless)

Package | Pins | Size

WSON (DSS) 12 6 mm² 3 x 2 open-in-new Find other Charge pumps (inductorless)

Features

  • Generates Low-Noise Adjustable Positive Supply Voltage Between 1.5 V and 5 V and Negative Supply Voltage Between –1.5 V and –5 V
  • Input Voltage Range 2.7 V to 5.5 V
  • ±250-mA Output Current
  • Inverting Charge Pump Followed by Negative LDO
  • 2-MHz Low-Noise Fixed-Frequency Operation
  • 2.5-Ω Inverter Output Impedance, VIN = 5 V
  • Negative LDO Dropout Voltage 30 mV at 100 mA, VOUT = –5 V
  • Positive LDO with 45-mV Dropout Voltage at 100 mA, VOUT = 5 V
  • 390-µA Quiescent Current (Typical)
  • Shutdown Quiescent Current to 0.5 µA (Typical)
  • Current Limit and Thermal Protection
  • Power Good Pin (Active Low)
  • Create a Custom Design Using the LM27762 With the WEBENCH Power Designer
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Description

The LM27762 delivers very low-noise positive and negative outputs that are adjustable between ±1.5 V and ±5 V. Input-voltage range is from 2.7 V to 5.5 V, and output current goes up to ±250 mA. With an operating current of only 390 µA and 0.5-µA typical shutdown current, the LM27762 provides ideal performance for power amplifier and DAC bias and other high-current, low-noise negative voltage needs. The device provides a small solution size with few external components.

Negative voltage is generated by a regulated inverting charge pump followed by a low-noise negative LDO. The inverting charge pump of the LM27762 device operates at 2-MHz (typical) switching frequency to reduce output resistance and voltage ripple. Positive voltage is generated from the input by a low-noise positive LDO.

Positive and negative outputs of LM27762 have dedicated enable inputs. These outputs support independent timing for the positive and negative rails for specific system power-sequence needs. Enable inputs can be also shorted together and connected to the input voltage. The LM27762 has an optional Power Good feature.

For all available packages, see the orderable addendum at the end of the data sheet.

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Technical documentation

= Featured
No results found. Please clear your search and try again. View all 7
Type Title Date
* Datasheet LM27762 Low-Noise Positive and Negative Output Integrated Charge Pump Plus LDO datasheet (Rev. B) Feb. 06, 2017
Application notes A Topical Index of TI Low Power Buck DC/DC Application Notes Jan. 17, 2018
Technical articles Low-noise charge pumps make it easy to create negative voltages Aug. 29, 2017
Technical articles The top three ways to split a voltage rail to a bipolar supply Dec. 27, 2016
User guides Using the LM27762 Evaluation Module Aug. 26, 2016
Technical articles Painting a picture for powering high-performance FPGAs Sep. 05, 2013
Technical articles Analog Applications Spotlight: Mark Pieper Jun. 06, 2013

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
Description

The ADS1235 evaluation module (EVM) is a platform for evaluating the ADS1235 analog-to-digital converter (ADC). ADS1235 is a low-drift, 24-bit, 7200-SPS, 6-channel delta-sigma (ΔΣ) ADC with an integrated PGA for low-noise bridge measurements. This sensor-ready ADC provides a (...)

Features
  • Includes all required support circuitry for ADS1235
  • Delta-Sigma ADC EvaluaTIon Software (DELTASIGMAEVAL-GUI) enables quick configuration and analysis
  • Configurable inputs, references, and supplies
  • Easily-accessible signals via test points and headers
EVALUATION BOARDS Download
document-generic User guide
Description

The ADS1261 evaluation module (EVM) is a platform for evaluating the ADS1261 analog-to-digital converter (ADC). ADS1261 is a low-drift, 24-bit, 40-kSPS, 10-channel delta-sigma (ΔΣ) ADC with an integrated PGA, voltage reference, and internal fault monitors. This sensor-ready ADC provides (...)

Features
  • Includes all required support circuitry for ADS1261
  • Delta-Sigma ADC EvaluaTIon Software (DELTASIGMAEVAL-GUI) enables quick configuration and analysis
  • Configurable inputs, references, and supplies
  • Easily-accessible signals via test points and headers
EVALUATION BOARDS Download
document-generic User guide
$49.00
Description
The LM27762 evaluation module (EVM) helps designers evaluate the operation and performance of this device. The   LM27762EVM uses the LM27762 to provide very low-noise adjustable positive and negative outputs for an input voltage range of 2.7 V to 5.5 V. Five low-cost capacitors are (...)
Features
  • Input voltage 2.7 V to 5.5 V
  • Output voltage +/-1.8 V to +/-5.2 V
  • +/-250-mA output current
  • 300-μA quiescent current
  • 2-MHz low-noise fixed-frequency operation

Design tools & simulation

SIMULATION MODELS Download
SNVMAV1B.ZIP (122 KB) - PSpice Model

Reference designs

REFERENCE DESIGNS Download
High-efficiency, low-emission, isolated DC/DC converter-based analog input module reference design
TIDA-010065 — This reference design is a simplified architecture for generating an isolated power supply for isolated amplifiers for measuring isolated voltages and currents. A fully integrated DC/DC converter with reinforced isolation operating from a 5-V input with configurable 5-V or 5.4-V output (headroom for (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Isolated power architecture reference design for communication and analog input/output modules
TIDA-00300 This reference design provides a simple means through which to isolate I2C or SPI type communication lines. This is often required in Grid Infrastructure applications such as, protertion relays and circuit breakers, where high voltages are involved. This reference design provides the complete (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High Accuracy Analog Front End Using 16-Bit SAR ADC with ±10V Measurement Range Reference Design
TIDA-00834 — The TIDA-00834 reference design accurately measures voltage and current inputs using simultaneously sampled, 16-bit, ±10 V, bipolar input SAR ADC critical to identify power systems malfunction and power quality related failures accurately and quickly. This results in reduced power systems (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Non-isolated power architecture with diagnostics reference design for protection relay modules
TIDA-010055 — This reference design showcases non-isolated power supply architectures for protection relays with analog input/output and communication modules generated from 5-, 12-, or 24-V DC input. To generate the power supplies the design uses DC/DC converters with an integrated FET, a power module with an (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
High Accuracy ±0.5% Current and Isolated Voltage Measurement Ref Design Using 24-Bit Delta-Sigma ADC
TIDA-00835 The TIDA-00835 reference design allows for accurate voltage and current measurement using a bipolar input configuration by incorporating a four- channel, 24-bit simultaneously-sampling differential input Delta-Sigma ADC over wide dynamic range. The ADC is configured to measure ±2.5 V bipolar (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Isolated, Transformerless, Bipolar Supply for 24-Bit ADCs Reference Design
TIDA-01434 — This isolated, 3.65-mm thin reference design enables highly-integrated, bipolar input and high-performance solutions with a 24-bit delta-sigma analog-to-digital converter (ADC). Modern analog input modules need high performance in different aspects such as higher channel density at the same room (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Isolated, High-Accuracy Analog Input Module Reference Design Using 16-Bit ADC and Digital Isolator
TIDA-01214 — This reference design provides accurate measurements of AC voltage and current inputs using a precision 16-bit SAR ADC over a wide input range, covering protection and measurement range (including sampling requirements of IEC 61850-9-2), simplifying system design and improving trip time performance (...)
document-generic Schematic document-generic User guide
REFERENCE DESIGNS Download
Hi-Fi Headphone Amplifier Power Supply Reference Design
TIDA-01341 — Headphone amplifiers usually require positive and negative voltages. In this reference design, both voltages are generated from a single input voltage with an integrated split-rail charge-pump converter. It provides small solution size with five capacitors and four resistors.
document-generic Schematic document-generic User guide

CAD/CAE symbols

Package Pins Download
WSON (DSS) 12 View options

Ordering & quality

Support & training

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