LP3986_15 Datasheet, PDF (1/18 Pages) Texas Instruments – LP3986 Dual Micropower 150 mA Ultra Low-Dropout CMOS Voltage Regulators in DSBGA Package

LP3986
www.ti.com
SNVS142U – AUGUST 2001 – REVISED FEBRUARY 2013
LP3986 Dual Micropower 150 mA Ultra Low-Dropout CMOS Voltage Regulators in DSBGA
Package
Check for Samples: LP3986
FEATURES
1
•2 Miniature 8-I/O DSBGA Package
• Stable With 1µF Ceramic and High Quality
Tantalum Output Capacitors
• Fast Turn-on
• Two Independent Regulators
• Logic Controlled Enable
• Over Current and Thermal Protection
APPLICATIONS
• CDMA Cellular Handsets
• GSM Cellular Handsets
• Portable Information Appliances
• Portable Battery Applications
DESCRIPTION
The LP3986 is a 150 mA dual low dropout regulator
designed for portable and wireless applications with
demanding performance and board space
requirements.
The LP3986 is stable with a small 1 µF ±30%
ceramic output capacitor requiring smallest possible
board space.
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.
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
Guaranteed output current per regulator
Typical quiescent current when both regulators in shutdown mode
Typical dropout voltage at 150 mA output current
Typical ground current
Typical output noise
Fast turn-on circuit
Junction temperature
VALUE
150
1
60
115
40
200
−40 to +125
UNIT
mA
nA
mV
µA
µV
µs
°C
1
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Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
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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.
Copyright © 2001–2013, Texas Instruments Incorporated