Product details

Output options Fixed Output Iout (Max) (A) 0.3 Vin (Max) (V) 6 Vin (Min) (V) 2.7 Vout (Max) (V) 3.3 Vout (Min) (V) 2.5 Fixed output options (V) 2.5, 2.7, 2.8, 3, 3.3 Noise (uVrms) 35 Iq (Typ) (mA) 0.07 Thermal resistance θJA (°C/W) 57 Rating Catalog Load capacitance (Min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR @ 100 KHz (dB) 25 Dropout voltage (Vdo) (Typ) (mV) 132 Operating temperature range (C) -40 to 125
Output options Fixed Output Iout (Max) (A) 0.3 Vin (Max) (V) 6 Vin (Min) (V) 2.7 Vout (Max) (V) 3.3 Vout (Min) (V) 2.5 Fixed output options (V) 2.5, 2.7, 2.8, 3, 3.3 Noise (uVrms) 35 Iq (Typ) (mA) 0.07 Thermal resistance θJA (°C/W) 57 Rating Catalog Load capacitance (Min) (µF) 2.2 Regulated outputs (#) 1 Features Enable Accuracy (%) 2 PSRR @ 100 KHz (dB) 25 Dropout voltage (Vdo) (Typ) (mV) 132 Operating temperature range (C) -40 to 125
VSSOP (DGK) 8 15 mm² 3 x 4.9 WSON (NGC) 6 12 mm² 3 x 4
  • 2.5-V to 6-V Input Range
  • 300-mA Output Current
  • 60-dB PSRR at 1 kHz
  • ≤ 1-µA Quiescent Current When Shut Down
  • Fast Turnon Time: 120 µs (typical) with CBYPASS =
    0.01 µF
  • 132-mV Typical Dropout with 300-mA Load
  • 35-µVrms Output Noise Over 10 Hz to 100 kHz
  • Logic Controlled Enable
  • Stable With Ceramic and High-Quality Tantalum
    Capacitors
  • Thermal Shutdown and Short-Circuit Current Limit
  • Low Thermal Resistance in WSON-6 Package
    Gives Excellent Power Capability
  • 2.5-V to 6-V Input Range
  • 300-mA Output Current
  • 60-dB PSRR at 1 kHz
  • ≤ 1-µA Quiescent Current When Shut Down
  • Fast Turnon Time: 120 µs (typical) with CBYPASS =
    0.01 µF
  • 132-mV Typical Dropout with 300-mA Load
  • 35-µVrms Output Noise Over 10 Hz to 100 kHz
  • Logic Controlled Enable
  • Stable With Ceramic and High-Quality Tantalum
    Capacitors
  • Thermal Shutdown and Short-Circuit Current Limit
  • Low Thermal Resistance in WSON-6 Package
    Gives Excellent Power Capability

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.

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Technical documentation

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* Data sheet LP3981 Micropower, 300-mA Ultra-Low-Dropout CMOS Voltage Regulator datasheet (Rev. H) 18 Jul 2015

Design & development

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Reference designs

PMP10613 — Xilinx Zynq 7000 Series (XC7Z045) 20W Reference Design

The PMP10613 reference design provides all the power supply rails necessary to power Xilinx® Zynq® 7000 series (XC7Z045)  FPGA.   This design uses several LMZ3 series modules, LDOs, and a DDR termination regulator to provide all the necessary rails to power the FPGA.  It (...)
Package Pins Download
VSSOP (DGK) 8 View options
WSON (NGC) 6 View options

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