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.
PART NUMBER | PACKAGE | BODY SIZE (NOM) |
---|---|---|
LM2776 | SOT-23 (6) | 2.90 mm × 1.60 mm |
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PIN | TYPE | DESCRIPTION | ||
---|---|---|---|---|
NUMBER | NAME | |||
1 | VOUT | Output/Power | Negative voltage output. | |
2 | GND | Ground | Power supply ground input. | |
3 | VIN | Input/Power | Power supply positive voltage input. | |
4 | EN | Input | Enable control pin, tie this pin high (EN = 1) for normal operation, and to GND (EN = 0) for shutdown. | |
5 | C1+ | Power | Connect this pin to the positive terminal of the charge-pump capacitor. | |
6 | C1- | Power | Connect this pin to the negative terminal of the charge-pump capacitor. |