300mA Linear Voltage Regulator For Digital Applications

Operating from a minimum input voltage of 1.65V, the LP3991 Regulator has been designed to provide fixed stable output voltages for load currents up to 300mA. This device is suitable where accurate, low voltages are required from low input voltage sources and is therefore suitable for post regulation of switched mode Regulators In such applications, significant improvements in performance and EMI CAN be realized, with little reduction in overall efficiency. The LP3991 will provide fixed outputs as low as 1.2V from a wide input range of 1.65V to 3.6V Using the enable pin, the device may be controlled to provide a shutdown state, in which negligible supply current is drawn.
The LP3991 is designed to be stable with space saving ceramic capacitors as small as 0402 case size.
Performance is specified for a -40C to 125C junction temperature range.
For output voltage options please contact your local NSC sales office.
By National Semiconductor Corporation
Part Manufacturer Description Datasheet Samples
LP3991TL-1.55/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA
LP3991TLX-1.3/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA -40 to 125
LP3991TLX-2.8/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA -40 to 125
LP3991TL-1.2/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA -40 to 125
LP3991TL-1.3/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA -40 to 125
LP3991TL-1.5/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA -40 to 125
LP3991TLX-1.5/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA -40 to 125
LP3991TL-1.7/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA
LP3991TL-1.8/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA
LP3991TL-2.8/NOPB Texas Instruments 300-mA LDO for Digital Applications 4-DSBGA -40 to 125
LP3991 's PackagesLP3991 's pdf datasheet
LP3991TL-1.2EV
LP3991TL-1.3EV
LP3991TL-1.5EV
LP3991TL-1.8EV
LP3991TL-1.8
LP3991TL-2.0
LP3991TLX-1.8
LP3991TLX-2.0
LP3991TL-0.8
LP3991TL-1.2
LP3991TL-1.3
LP3991TL-1.5
LP3991TL-2.5
LP3991TL-2.8
LP3991TL-3.0
LP3991TLX-0.8
LP3991TLX-1.2
LP3991TLX-1.3
LP3991TLX-1.5
LP3991TLX-2.5
LP3991TLX-2.8
LP3991TLX-3.0




LP3991 Pinout, Pinouts
LP3991 pinout,Pin out
This is one package pinout of LP3991,If you need more pinouts please download LP3991's pdf datasheet.

LP3991 Application circuits
LP3991 circuits
This is one application circuit of LP3991,If you need more circuits,please download LP3991's pdf datasheet.


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