LP3986
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SNVS142U –AUGUST 2001–REVISED FEBRUARY 2013
LP3986 Dual Micropower 150 mA Ultra Low-Dropout CMOS Voltage Regulators in DSBGA
Package
Check for Samples: LP3986
1
FEATURES
DESCRIPTION
The LP3986 is a 150 mA dual low dropout regulator
designed for portable and wireless applications with
2
•
Miniature 8-I/O DSBGA Package
•
Stable With 1µF Ceramic and High Quality
Tantalum Output Capacitors
demanding
performance
and
board
space
requirements.
•
•
•
•
Fast Turn-on
The LP3986 is stable with a small 1 µF ±30%
ceramic output capacitor requiring smallest possible
board space.
Two Independent Regulators
Logic Controlled Enable
Over Current and Thermal Protection
The LP3986's performance is optimized for battery
powered systems to deliver ultra low noise, extremely
low dropout voltage and low quiescent current
independent of load current. Regulator ground current
increases very slightly in dropout, further prolonging
the battery life. Optional external bypass capacitor
reduces the output noise further without slowing down
the load transient response. Fast start-up time is
achieved by utilizing a speed-up circuit that actively
pre-charges the bypass capacitor. Power supply
rejection is better than 60 dB at low frequencies and
55 dB at 10 kHz. High power supply rejection is
maintained at low input voltage levels common to
battery operated circuits.
APPLICATIONS
•
•
•
•
CDMA Cellular Handsets
GSM Cellular Handsets
Portable Information Appliances
Portable Battery Applications
The LP3986 is available in a DSBGA package.
Performance is specified for a −40°C to +125°C
temperature range. For single LDO applications,
please refer to the LP3985 datasheet.
Table 1. Key Specifications
VALUE
UNIT
mA
nA
Guaranteed output current per regulator
150
Typical quiescent current when both regulators in shutdown mode
Typical dropout voltage at 150 mA output current
Typical ground current
1
60
mV
µA
115
Typical output noise
40
µV
Fast turn-on circuit
200
µs
Junction temperature
−40 to +125
°C
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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