Specification	LP3981ILD-2.5/NOPB

Control Features	Enable
Current - Output	300 mA
Current - Quiescent (Iq)	120 µA
Current - Supply (Max) [Max]	210 µA
Mounting Type	Surface Mount
Number of Regulators	1
Operating Temperature [Max]	125 °C
Operating Temperature [Min]	-40 °C
Output Configuration	Positive
Output Type	1.81 mOhm
Protection Features	Over Temperature, Over Current, Short Circuit
PSRR [Max]	55 dB
PSRR [Min]	50 dB
Supplier Device Package	6-WSON (3x4)
Voltage - Input (Max) [Max]	6 V
Voltage - Output (Min/Fixed)	2.5 V
Voltage Dropout (Max) [Max]	0.2 V

LP3981 Series

300-mA, high-accuracy, low-dropout voltage regulator with enable

Part	Output Type	Package / Case	Package / Case [custom]	Package / Case	Mounting Type	PSRR [Max]	PSRR [Min]	Current - Output	Current - Supply (Max) [Max]	Control Features	Voltage - Input (Max) [Max]	Voltage Dropout (Max) [Max]	Number of Regulators	Protection Features	Operating Temperature [Max]	Operating Temperature [Min]	Output Configuration	Voltage - Output (Min/Fixed)	Current - Quiescent (Iq)	Supplier Device Package
Texas Instruments LP3981IMM-2.7/NOPB	1.81 mOhm	8-MSOP 8-TSSOP	0.118 in	3 mm	Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	2.7 V	120 µA
Texas Instruments LP3981ILD-2.5/NOPB	1.81 mOhm				Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	2.5 V	120 µA	6-WSON (3x4)
Texas Instruments LP3981IMM-3.03/NOPB	1.81 mOhm	8-MSOP 8-TSSOP	0.118 in	3 mm	Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	3.03 V	120 µA
Texas Instruments LP3981IMMX-3.3/NOPB	1.81 mOhm	8-MSOP 8-TSSOP	0.118 in	3 mm	Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	3.3 V	120 µA
Texas Instruments LP3981IMM-3.03	1.81 mOhm	8-MSOP 8-TSSOP	0.118 in	3 mm	Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	3.03 V	120 µA
Texas Instruments LP3981ILDX-2.7	1.81 mOhm				Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	2.7 V	120 µA	6-WSON (3x4)
Texas Instruments LP3981IMM-2.8/NOPB	1.81 mOhm	8-MSOP 8-TSSOP	0.118 in	3 mm	Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	2.8 V	120 µA
Texas Instruments LP3981ILDX-2.8/NOPB	1.81 mOhm				Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	2.8 V	120 µA	6-WSON (3x4)
Texas Instruments LP3981IMM-3.3/NOPB	1.81 mOhm	8-MSOP 8-TSSOP	0.118 in	3 mm	Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	3.3 V	120 µA
Texas Instruments LP3981IMMX-3.3	1.81 mOhm	8-MSOP 8-TSSOP	0.118 in	3 mm	Surface Mount	55 dB	50 dB	300 mA	210 µA	Enable	6 V	0.2 V	1	Over Current Over Temperature Short Circuit	125 °C	-40 °C	Positive	3.3 V	120 µA

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	$ 0.85
		10	$ 0.76
		25	$ 0.72
		100	$ 0.59
		250	$ 0.56
		500	$ 0.49
	Digi-Reel®	1	$ 0.85
		10	$ 0.76
		25	$ 0.72
		100	$ 0.59
		250	$ 0.56
		500	$ 0.49
	Tape & Reel (TR)	1000	$ 0.39
		2000	$ 0.36
		5000	$ 0.34
		10000	$ 0.33
		25000	$ 0.32
Texas Instruments	SMALL T&R	1	$ 0.63
		100	$ 0.49
		250	$ 0.36
		1000	$ 0.26

Description

General part information

LP3981 Series

Performance of the LP3981 device is optimized for battery-powered systems to deliver ultra-low-noise, extremely low dropout voltage, and low quiescent current. Regulator ground current increases only slightly in dropout, further prolonging the battery life.

Power supply rejection is better than 60 dB at low frequencies. This high power supply rejection is maintained down to lower input voltage levels common to battery-operated circuits.

The device is ideal for mobile phone and similar battery-powered wireless applications. It provides up to 300 mA, from a 2.5-V to 6-V input, consuming less than 1 µA in disable mode.

Documents

Technical documentation and resources

LP3981 Micropower, 300-mA Ultra-Low-Dropout CMOS Voltage Regulator datasheet (Rev. H)

Data sheet