The LM2771 is a switched capacitor step-down regulator that produces a 1.5V output without the use of an inductor. It is capable of supplying loads up to 250mA. The LM2771 operates with an input voltage from 2.7V to 5.5V, and requires only 3 low-cost ceramic capacitors.
When output currents are low (<30mA typ.), the part automatically switches to a low-ripple PFM regulation mode to maintain high efficiency over the entire load range.
At input voltages below 3.5V (Typ), the charge pump goes into pass mode, with efficiencies similar to an LDO.
| Manufacturer | Texas Instruments |
|---|---|
| Category | AC/DC and DC/DC Conversion |
| Sub-Category | DC/DC SMPS - Single Output |
| Eval Board Part Number | LM2771SDEV-ND |
| Eval Board Supplier | Texas Instruments |
| Eval Board |
Board not Stocked
|
| Topology |
Step Down
Switch Cap, Charge Pump |
| Outputs and Type |
1 Non-Isolated
|
| Voltage Out: Factory Set |
1.5 V
|
| Current Out |
250 mA
|
| Voltage In |
2.7 ~ 5.5 V
|
| Efficiency @ Conditions |
>80%, 3.6V in, 1.8V @ 40 ~ 250 mA
|
| Voltage Out Range |
- Not Given
|
| Features |
Light Load Mode
|
| Switching Frequency |
1.1 MHz
|
| Standby Current [Typical] |
100 nA
|
| Quiescent Current [Typical] |
45 µA
|
| Component Count + Extras |
4 + 6
|
| Internal Switch |
Yes
|
| Design Author |
Texas Instruments
|
| Application / Target Market |
Point of Load (PoL)
Portable Devices |
| Standby Current [Maximum] |
500 nA
|
| Quiescent Current [Maximum] |
50 µA
|
| Main I.C. Base Part |
LM2771SD
|
| Date Created By Author | |
| Date Added To Library | 2025-04 |
Hong Kong, China
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