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LM2776

ACTIVE

Switched Capacitor Inverter

Product details

Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) -5.5 Vout (max) (V) -2.7 Iout (max) (A) 0.2 Regulated outputs (#) 1 Switching frequency (min) (kHz) 1700 Switching frequency (max) (kHz) 2300 Iq (typ) (mA) 0.1 Features Enable, Light Load Efficiency Mode, Output discharge, Synchronous Rectification, UVLO Fixed Operating temperature range (°C) -40 to 85 Rating Catalog Type Charge pump, Converter
Vin (min) (V) 2.7 Vin (max) (V) 5.5 Vout (min) (V) -5.5 Vout (max) (V) -2.7 Iout (max) (A) 0.2 Regulated outputs (#) 1 Switching frequency (min) (kHz) 1700 Switching frequency (max) (kHz) 2300 Iq (typ) (mA) 0.1 Features Enable, Light Load Efficiency Mode, Output discharge, Synchronous Rectification, UVLO Fixed Operating temperature range (°C) -40 to 85 Rating Catalog Type Charge pump, Converter
SOT-23 (DBV) 6 8.12 mm² 2.9 x 2.8
  • Input Voltage: 2.7 V to 5.5 V
  • 200-mA Output Current
  • Inverts Input Supply Voltage
  • Low-Current PFM Mode Operation
  • 2-MHz Switching Frequency
  • Greater than 90% Efficiency
  • Current Limit and Thermal Protection
  • No Inductors
  • Input Voltage: 2.7 V to 5.5 V
  • 200-mA Output Current
  • Inverts Input Supply Voltage
  • Low-Current PFM Mode Operation
  • 2-MHz Switching Frequency
  • Greater than 90% Efficiency
  • Current Limit and Thermal Protection
  • No Inductors

The LM2776 CMOS charge-pump voltage converter inverts a positive voltage in the range from 2.7 V to 5.5 V to the corresponding negative voltage. The LM2776 uses three low-cost capacitors to provide 200 mA of output current without the cost, size, and electromagnetic interference (EMI) related to inductor-based converters.

With an operating current of only 100 µA and operating efficiency greater than 90% at most loads, the LM2776 provides ideal performance for battery-powered systems requiring a high power negative power supply.

The LM2776 has been placed in TI’s 6-pin SOT-23 to maintain a small form factor.

The LM2776 CMOS charge-pump voltage converter inverts a positive voltage in the range from 2.7 V to 5.5 V to the corresponding negative voltage. The LM2776 uses three low-cost capacitors to provide 200 mA of output current without the cost, size, and electromagnetic interference (EMI) related to inductor-based converters.

With an operating current of only 100 µA and operating efficiency greater than 90% at most loads, the LM2776 provides ideal performance for battery-powered systems requiring a high power negative power supply.

The LM2776 has been placed in TI’s 6-pin SOT-23 to maintain a small form factor.

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Technical documentation

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Type Title Date
* Data sheet LM2776 Switched Capacitor Inverter datasheet (Rev. B) PDF | HTML 07 Feb 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 Aug 2017
Technical article Pump it up quietly PDF | HTML 19 Feb 2016
Technical article Pump it up with charge pumps – Part 1 PDF | HTML 01 Feb 2016
White paper The Forgotten Converter 15 Jun 2015
User guide Using the LM2776 Evaluation Module 19 May 2015

Design & development

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

Evaluation board

LM2776EVM — LM2776 Charge Pump Inverter Evaluation Module

The LM2776EVM aids in evaluation of the LM2776 Charge Pump Inverter.  The 2 MHz switched capacitor  boost provides up to 200mA of output current utilizing 3 small external capacitors.  With a low current PFM or ECO mode, the LM2776 draws a minimal load from the power supply when the (...)

User guide: PDF
Not available on TI.com
Simulation model

LM2776 Unencrypted PSpice Transient Model Package (Rev. A)

SNVMAR2A.ZIP (80 KB) - PSpice Model
Simulation tool

PSPICE-FOR-TI — PSpice® for TI design and simulation tool

PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
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Design guide: PDF
Schematic: PDF
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TIDA-01063 — High Accuracy AC Current Measurement Reference Design using PCB Rogowski Coil Sensor

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Design guide: PDF
Schematic: PDF
Package Pins Download
SOT-23 (DBV) 6 View options

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