LP3981ILD-3.3 Datasheet, PDF (1/21 Pages) Texas Instruments – LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator

LP3981
www.ti.com
SNVS159G – OCTOBER 2001 – REVISED MAY 2013
LP3981 Micropower, 300mA Ultra Low-Dropout CMOS Voltage Regulator
Check for Samples: LP3981
FEATURES
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•2 Small, Space Saving VSSOP-8
• Low Thermal Resistance in WSON-6 Package
Gives Excellent Power Capability
• Logic Controlled Enable
• Stable with Ceramic and High Quality
Tantalum Capacitors
• Fast Turn-On
• Thermal Shutdown and Short-Circuit Current
Limit
KEY SPECIFICATIONS
• 2.5 to 6.0V Input Range
• 300mA Output
• 60dB PSRR at 1kHz
• ≤1μA Quiescent Current when Shut Down
• Fast Turn-On Time: 120 μs (Typ.) with C_BYPASS
= 0.01uF
• 132mV Typ Dropout with 300mA Load
• 35μVrms Output Noise over 10Hz to 100kHz
• −40 to +125°C Junction Temperature Range for
Operation
• 2.5V, 2.7V, 2.8V, 2.83V, 3.0V, 3.03V, and 3.3V
Outputs Standard
APPLICATIONS
• CDMA Cellular Handsets
• Wideband CDMA Cellular Handsets
• GSM Cellular Handsets
• Portable Information Appliances
• Tiny 3.3V ± 5% to 2.5V, 300mA Converter
DESCRIPTION
The LP3981's performance 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 2.5V to 6V input, consuming less
than 1µA in disable mode.
The LP3981 is available in VSSOP-8 package. For
LP3981 in WSON-6 package, contact TI sales offices.
Performance is specified for −40°C to +125°C
temperature range. The device available in the
following output voltages; 2.5V, 2.7V, 2.8V, 2.83V,
3.0V, 3.03V and 3.3V as standard. Other output
options can be made available, please contact your
local TI sales office.
Typical Application Circuit
Note: Pin Numbers in parenthesis indicate WSON-6 package.
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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