Specification	LP3991TL-1.2/NOPB

Control Features	Enable
Current - Output	300 mA
Current - Quiescent (Iq)	100 µA
Current - Supply (Max) [Max]	225 µA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	85 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Package / Case	DSBGA, 4-WFBGA
PSRR	65 dB
Supplier Device Package	4-DSBGA (1x1)
Voltage - Input (Max)	4 V
Voltage - Output (Min/Fixed)	1.2 V
Voltage Dropout (Max) [Max]	0.16 V

LP3991 Series

Part	Output Type	Current - Quiescent (Iq)	PSRR	Operating Temperature [Max]	Operating Temperature [Min]	Control Features	Voltage Dropout (Max) [Max]	Voltage - Output (Min/Fixed)	Current - Supply (Max) [Max]	Current - Output	Mounting Type	Output Configuration	Package / Case	Voltage - Input (Max)	Number of Regulators	Supplier Device Package	Voltage - Output	Regulator Type	Utilized IC / Part	Supplied Contents	Channels per IC	Voltage - Input [Max]	Voltage - Input [Min]	Board Type	Voltage - Output (Min/Fixed) [Min]
Texas Instruments LP3991TL-1.8/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V	1.8 V	225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)
Texas Instruments LP3991TL-1.2EV										300 mA							1.2 V	Positive Fixed	LP3991	Board(s)	1 - Single	4 V	1.65 V	Fully Populated
Texas Instruments LP3991TL-1.2/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V	1.2 V	225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)
Texas Instruments LP3991TLX-1.2/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V	1.2 V	225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)
Texas Instruments LP3991TL-1.55/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V	1.55 V	225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)
Texas Instruments LP3991TLX-1.7/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V		225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)
Texas Instruments LP3991TLX-2.0/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V		225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)									2 V
Texas Instruments LP3991TL-1.3/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V	1.3 V	225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)
Texas Instruments LP3991TLX-3.0/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V		225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)
Texas Instruments LP3991TLX-2.8/NOPB	1.81 mOhm	100 µA	65 dB	85 °C	-40 °C	Enable	0.16 V	2.8 V	225 µA	300 mA	Surface Mount	Positive	4-WFBGA DSBGA	4 V	1	4-DSBGA (1x1)

Pricing

Prices provided here are for design reference only. For realtime values and availability, please visit the distributors directly

Distributor	Package	Quantity	$

Digikey	Cut Tape (CT)	1	$ 0.62
		10	$ 0.55
		25	$ 0.52
		100	$ 0.43
	Digi-Reel®	1	$ 0.62
		10	$ 0.55
		25	$ 0.52
		100	$ 0.43
	Tape & Reel (TR)	250	$ 0.40
		500	$ 0.36
		1250	$ 0.33
Texas Instruments	SMALL T&R	1	$ 0.65
		100	$ 0.50
		250	$ 0.37
		1000	$ 0.26

Description

General part information

LP3991 Series

Operating from a minimum input voltage of 1.65 V, the LP3991 LDO has been designed to provide fixed stable output voltages for load currents up to 300 mA. 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 provides fixed outputs as low as 1.2 V from a wide input range from 1.65 V to 4 V Using the enable (EN) 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 –40°C to +125°C junction temperature range. For output voltage options, contact your local Texas Instruments sales office.