LP3984 Datasheet, PDF (1/19 Pages) National Semiconductor (TI) – Micropower, 150mA Ultra Low-Dropout CMOS Voltage Regulator in Subminiature 4-I/O micro SMD Package

LP3984
www.ti.com
SNVS160F – OCTOBER 2001 – REVISED OCTOBER 2013
LP3984 Micropower 150 mA Ultra Low-Dropout CMOS Voltage Regulator in Subminiature
4-I/O DSBGA Package
Check for Samples: LP3984
FEATURES
1
•2 Miniature 4-I/O DSBGA or SOT-23-5 Package
• Logic controlled enable
• Stable with Tantalum Capacitors
• 1 µF Tantalum Output Capacitor
• Fast Turn-On
• Thermal Shutdown and Short-Circuit Current
Limit
KEY SPECIFICATIONS
• 2.5 to 6.0V Input Range
• 150 mA Output
• 60 dB PSRR at 1 kHz, 40 dB at 10 kHz @ 3.1V_IN
• ≤ 1.2 µA Quiescent Current when Shut Down
• Fast Turn-On Time: 20 µs (typ.)
• 75 mV typ Dropout with 150 mA Load
• −40 to +125°C Junction Temperature Range for
Operation
• 1.5V, 1.8V, 2.9V and 3.1V
APPLICATIONS
• CDMA Cellular Handsets
• Wideband CDMA Cellular Handsets
• GSM Cellular Handsets
• Portable Information Appliances
DESCRIPTION
The LP3984 is designed for portable and wireless
applications with demanding performance and space
requirements.
The LP3984's performance is optimized for battery
powered systems to deliver 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 and starts to roll off at 10 kHz. High
power supply rejection is maintained down to low
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 150 mA from a 2.5V to 6V input. The LP3984
consumes less than 1.2 µA in disable mode and has
fast turn-on time less than 20 µs.
The LP3984 is available in a 4-bump DSBGA and 5-
pin SOT-23 packages. Performance is specified for
−40°C to +125°C temperature range and is available
in 1.5V, 1.8V, 2.9V and 3.1V output voltages. For
other output voltage options from 1.5V to 3.5V,
please contact TI sales office.
Typical Application Circuit
1(B2)
VIN
5(B1)
VOUT
12F
LP3984
3(A2)
VEN
2(A1)
4
NC
12F Tant
Note: Pin Numbers in parenthesis indicate DSBGA package.
1
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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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