Switched Capacitor Inverter
Product details
Parameters
Package | Pins | Size
Features
- 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
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Description
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 TIs 6-pin SOT-23 to maintain a small form factor.
Technical documentation
Type | Title | Date | |
---|---|---|---|
* | Datasheet | LM2776 Switched Capacitor Inverter datasheet (Rev. B) | Feb. 07, 2017 |
Application note | 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 | Pump it up quietly | Feb. 19, 2016 | |
Technical articles | Pump it up with charge pumps – Part 1 | Feb. 01, 2016 | |
White paper | The Forgotten Converter | Jun. 15, 2015 | |
User guide | Using the LM2776 Evaluation Module | May 19, 2015 | |
Technical articles | Painting a picture for powering high-performance FPGAs | Sep. 05, 2013 |
Design & development
For additional terms or required resources, click any title below to view the detail page where available.Hardware development
Description
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 (...)
Features
- 200mA Output Current
- Very Low Output Impedance
- PFM Mode at Light Currents
- 2 MHz Switching Frequency
- Very Small Solution Size with No Inductor
Design tools & simulation
Features
- Leverages Cadence PSpice Technology
- Preinstalled library with a suite of digital models to enable worst-case timing analysis
- Dynamic updates ensure you have access to most current device models
- Optimized for simulation speed without loss of accuracy
- Supports simultaneous analysis of multiple products
- (...)
Reference designs
Design files
-
download TIDA-00626 BOM.pdf (60KB) -
download TIDA-00626 Gerber (Rev. A).zip (1976KB) -
download TIDA-00626 Assembly Drawing (Rev. A).pdf (474KB) -
download TIDA-00626 PCB (Rev. A).pdf (3487KB) -
download TIDA-00626 CAD Files (Rev. A).zip (3232KB)
Design files
-
download TIDA-01063 CAD Files.zip (1328KB) -
download TIDA-01063 Gerber.zip (408KB) -
download TIDA-01063 Assembly Drawing (Interface Board).pdf (173KB) -
download TIDA-01063 PCB Layout (Interface Board).pdf (822KB) -
download TIDA-01063 BOM (Interface Board).pdf (81KB) -
download TIDA-01063 PCB Layout Rogowski Coil.pdf (321KB) -
download TIDA-01063 Software Rogowski Coil Calculator.zip (310KB)
CAD/CAE symbols
Package | Pins | Download |
---|---|---|
SOT-23 (DBV) | 6 | View options |
Ordering & quality
- RoHS
- REACH
- Device marking
- Lead finish/Ball material
- MSL rating/Peak reflow
- MTBF/FIT estimates
- Material content
- Qualification summary
- Ongoing reliability monitoring
Recommended products may have parameters, evaluation modules or reference designs related to this TI product.
Support & training
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