TPS79501-Q1 Datasheet, PDF (1/18 Pages) Texas Instruments – ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 500-mA LOW-DROPOUT LINEAR REGULATORS

TPS79501-Q1
www.ti.com
ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 500-mA
LOW-DROPOUT LINEAR REGULATORS
Check for Samples: TPS79501-Q1
SLVSAJ9 – SEPTEMBER 2010
FEATURES
1
•2 Qualified for Automotive Applications
• 500-mA Low-Dropout Regulator With Enable
• High PSRR (50 dB at 10 kHz)
• Ultralow Noise (33 mV_RMS, TPS79501-Q1)
• Fast Start-Up Time (50 ms)
• Stable With a 1-mF Ceramic Capacitor
• Excellent Load/Line Transient Response
• Low Dropout Voltage (110 mV at Full Load,
TPS79501-Q1)
APPLICATIONS
• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth^®, Wireless LAN
DESCRIPTION
The TPS79501-Q1 low-dropout (LDO), low-power
linear voltage regulator features high power-supply
rejection ratio (PSRR), ultralow noise, fast start-up,
and excellent line and load transient responses in a
small outline SON package. The device is stable with
a small 1-mF ceramic capacitor on the output. The
TPS79501-Q1 uses an advanced, proprietary
BiCMOS fabrication process to yield extremely low
dropout voltages (for example, 110 mV at 500 mA).
The device achieves fast start-up times
(approximately 50 ms with a 0.001-mF bypass
capacitor) while consuming very low quiescent
current (265 mA, typical). Moreover, when the device
is placed in standby mode, the supply current is
reduced to less than 1 mA. The TPS79501-Q1
exhibits approximately 33 mV_RMS of output voltage
noise at 3-V output with a 0.1-mF bypass capacitor.
Applications with analog components that are
noise-sensitive, such as portable RF electronics,
benefit from the high-PSRR and low-noise features,
as well as from the fast response time.
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.
Bluetooth is a registered trademark of Bluetooth SIG, Inc.
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 © 2010, Texas Instruments Incorporated