LP3981 Series

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

Catalog

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

Catalog

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

Key Features

• 2.5-V to 6-V Input Range300-mA Output Current60-dB PSRR at 1 kHz≤ 1-µA Quiescent Current When Shut DownFast Turnon Time: 120 µs (typical) with CBYPASS=0.01 µF132-mV Typical Dropout with 300-mA Load35-µVrms Output Noise Over 10 Hz to 100 kHzLogic Controlled EnableStable With Ceramic and High-Quality TantalumCapacitorsThermal Shutdown and Short-Circuit Current LimitLow Thermal Resistance in WSON-6 PackageGives Excellent Power Capability2.5-V to 6-V Input Range300-mA Output Current60-dB PSRR at 1 kHz≤ 1-µA Quiescent Current When Shut DownFast Turnon Time: 120 µs (typical) with CBYPASS=0.01 µF132-mV Typical Dropout with 300-mA Load35-µVrms Output Noise Over 10 Hz to 100 kHzLogic Controlled EnableStable With Ceramic and High-Quality TantalumCapacitorsThermal Shutdown and Short-Circuit Current LimitLow Thermal Resistance in WSON-6 PackageGives Excellent Power Capability

Description

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. The LP3981 is available in 8-pin VSSOP-8 and 6-pin WSON packages. Performance is specified for −40°C to +125°C temperature range. The device available in the following output voltages: 2.5 V, 2.7 V, 2.8 V, 2.83 V, 3 V, 3.03 V and 3.3 V as standard. Other output options can be made available; contact your local TI sales office for more information. 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. The LP3981 is available in 8-pin VSSOP-8 and 6-pin WSON packages. Performance is specified for −40°C to +125°C temperature range. The device available in the following output voltages: 2.5 V, 2.7 V, 2.8 V, 2.83 V, 3 V, 3.03 V and 3.3 V as standard. Other output options can be made available; contact your local TI sales office for more information.