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LM2776

ACTIVE

Switched Capacitor Inverter

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Data sheet

LM2776

ACTIVE
Data sheet Order now

Product details

Rating Catalog Operating temperature range (°C) -40 to 85 Type Charge pump, Converter Iout (max) (A) 0.2 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1700 Switching frequency (max) (kHz) 2300 Features Enable, Light Load Efficiency Mode, Output discharge, Synchronous Rectification, UVLO Fixed, Unregulated Vout (min) (V) -5.5 Vout (max) (V) -2.7 Iq (typ) (µA) 100
Rating Catalog Operating temperature range (°C) -40 to 85 Type Charge pump, Converter Iout (max) (A) 0.2 Vin (min) (V) 2.7 Vin (max) (V) 5.5 Switching frequency (min) (kHz) 1700 Switching frequency (max) (kHz) 2300 Features Enable, Light Load Efficiency Mode, Output discharge, Synchronous Rectification, UVLO Fixed, Unregulated Vout (min) (V) -5.5 Vout (max) (V) -2.7 Iq (typ) (µA) 100
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
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Reference designs

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This design is a 9.8-GHz wideband, low-phase noise, integrated continuous wave (CW) RF signal generator with versatile spur reduction technique. The output level can be programmed from -32 dBm to 14.5 dBm in 0.5-dB steps. This signal generator can be used as local oscillator for applications, such (...)
Design guide: PDF
Schematic: PDF
Reference designs

TIDA-01063 — High Accuracy AC Current Measurement Reference Design using PCB Rogowski Coil Sensor

TIDA-01063 is a reference design for current sensing using a PCB Rogowski Coil sensor to achieve very good linearity for wide measurement range at very low system BOM cost. PCB Rogowski sensor is advantageous for isolated current measurement due to very high bandwidth of 20 MHz and fast settling (...)
Design guide: PDF
Schematic: PDF
Package Pins CAD symbols, footprints & 3D models
SOT-23 (DBV) 6 Ultra Librarian
TI's Standard Terms and Conditions for Evaluation Items apply.

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