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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| Part number | Order | Vin (Min) (V) | Vin (Max) (V) | Vout (Min) (V) | Vout (Max) (V) | Iout (Max) (A) | Regulated outputs (#) | Switching frequency (Min) (kHz) | Switching frequency (Max) (kHz) | Iq (Typ) (mA) | Features | Operating temperature range (C) | Type | Rating | Package Group |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| LM2776 |
|
2.7 | 5.5 | -5.5 | -2.7 | 0.2 | 1 | 1700 | 2300 | 0.1 |
Enable
Light Load Efficiency Mode Output Discharge Synchronous Rectification UVLO Fixed |
-40 to 85 | Charge Pump | Catalog | SOT-23 | 6 |
| LM27761 |
|
2.7 | 5.5 | -5.2 | -1.5 | 0.25 | 1 | 1700 | 2300 | 0.37 |
Enable
Integrated LDO Light Load Efficiency Mode Output Discharge Synchronous Rectification UVLO Fixed |
-40 to 85 | Charge Pump | Catalog | WSON | 8 |
| LM27762 |
|
2.7 | 5.5 | -5 | 5 | 0.25 | 2 | 1800 | 2200 | 0.39 |
Enable
Integrated LDO Light Load Efficiency Mode Multiple Outputs Output Discharge Power Good Synchronous Rectification |
-40 to 85 | Charge Pump | Catalog | WSON | 12 |
