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LP3999
Enable Control,
Active high
Load
C
BYPASS
10 nF
1.0 uF
1.0 PF
V
IN
V
IN
V
OUT
GND
V
EN
C1
A3
B2
A1
C3
LP3999
www.ti.com
SNVS207E –JUNE 2003–REVISED MAY 2013
LP3999 Low Noise 150mA Voltage Regulator for RF/Analog Applications
Check for Samples: LP3999
1
FEATURES
APPLICATIONS
2
• 5 pin DSBGA Package
• GSM Portable Phones
• Stable with Ceramic Capacitor • CDMA Cellular Handsets
• Logic Controlled Enable • Wideband CDMA Cellular Handsets
• Fast Turn-on • Bluetooth Devices
• Thermal-overload and short-circuit protection • Portable Information Appliances
• −40 to +125°C junction temperature range for • Handheld MP3 Devices
operation
DESCRIPTION
KEY SPECIFICATIONS
The LP3999 regulator is designed to meet the
requirements of portable wireless battery-powered
• 2.5V to 6.0V Input Range
applications and will provide an accurate output
• Accurate Output Voltage; ±75mV / 2%
voltage with low noise and low quiescent current.
• 60 mV Typical Dropout with 150 mA Load. V
out
Ideally suited for powering RF/Analog devices this
device will also be used to meet more general circuit
> 2.5V
requirements.
• Virtually Zero Quiescent Current when
Disabled
For battery powered applications the low dropout and
low ground current provided by the device allows the
• 10 μVrms Output Noise Over 10Hz to 100kHz
lifetime of the battery to be maximized.The inclusion
• Stable with a 1 μF Output Capacitor
of an Enable(disable) control can be used by the
• Ensured 150 mA Output Current
system to further extend the battery lifetime by
reducing the power consumption to virtually zero.
• Fast Turn-on Time; 140 μs (Typ.)
Should the application require a device with an active
disable function please refer to device LP3995.
The LP3999 also features internal protection against
short-circuit currents and over-temperature
conditions.
Typical Application Circuit
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
2All trademarks are the property of their respective owners.
PRODUCTION DATA information is current as of publication date.
Copyright © 2003–2013, Texas Instruments Incorporated
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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