TPS795_15 Datasheet, PDF (1/33 Pages) Texas Instruments – TPS795 Ultralow-Noise, High-PSRR, Fast, RF, 500-mA Low-Dropout Linear Regulators

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TPS795
SLVS350I – OCTOBER 2002 – REVISED MAY 2015
TPS795 Ultralow-Noise, High-PSRR, Fast, RF, 500-mA Low-Dropout Linear Regulators
1 Features
•1 500-mA Low-Dropout Regulator With Enable
• Available in Fixed and Adjustable (1.2-V to 5.5-V)
Versions
• High PSRR (50 dB at 10 kHz)
• Ultralow Noise (33 μV_RMS, TPS79530)
• Fast Start-Up Time (50 μs)
• Stable With a 1-μF Ceramic Capacitor
• Excellent Load and Line Transient Response
• Low Dropout Voltage (110 mV at Full Load,
TPS79530)
• 6-Pin SOT-223 and 3-mm × 3-mm WSON
Packages
2 Applications
• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth^®, Wireless LAN
• Cellular and Cordless Telephones
• Handheld Organizers, PDAs
TPS79530 Ripple Rejection vs Frequency
80
V_IN = 4 V
70 COUT = 10mF
C_NR = 0.01mF
60
I_OUT = 1 mA
50
40
I_OUT = 500 mA
30
20
10
3 Description
The TPS795 family of low-dropout (LDO), low-power
linear voltage regulators features high power-supply
rejection ratio (PSRR), ultralow noise, fast start-up,
and excellent line and load transient responses in
small outline, 6-pin SOT-223 and 3-mm × 3-mm
WSON packages. Each device in the family is stable
with a small 1-μF ceramic capacitor on the output.
The family uses an advanced, proprietary BiCMOS
fabrication process to yield extremely low dropout
voltages (for example, 110 mV at 500 mA). Each
device achieves fast start-up times (approximately
50 μs with a 0.001-μF bypass capacitor) while
consuming very low quiescent current (265 μA,
typical). Moreover, when the device is placed in
standby mode, the supply current is reduced to less
than 1 μA. The TPS79530 device exhibits
approximately 33 μV_RMS of output voltage noise at 3-
V output with a 0.1-μF 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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS795
SOT-223 (6)
WSON (8)
6.50 mm × 3.50 mm
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
TPS79530 vs Frequency
0.5
V_IN = 5.5 V
C_OUT = 2.2mF
0.4
C_NR = 0.1mF
0.3
I_OUT = 1 mA
0.2
I_OUT = 0.5 A
0.1
0
1 10 100 1 k 10 k 100 k 1 M 10 M
Frequency (Hz)
0
100
1k
10 k
Frequency (Hz)
100 k
1
An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,
intellectual property matters and other important disclaimers. PRODUCTION DATA.