TPS796_15 Datasheet, PDF (1/39 Pages) Texas Instruments – TPS796xx Ultralow-Noise, High PSRR, Fast, RF, 1-A Low-Dropout Linear Regulators

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TPS79601, TPS79613, TPS79618, TPS79625
TPS79628, TPS79630, TPS79633, TPS79650
SLVS351P – SEPTEMBER 2002 – REVISED MARCH 2015
TPS796xx Ultralow-Noise, High PSRR, Fast, RF, 1-A Low-Dropout Linear Regulators
1 Features
•1 1-A Low-Dropout Regulator With Enable
• Available in Fixed and Adjustable (1.2 V to 5.5 V)
Versions
• High PSRR (53 dB at 10 kHz)
• Ultralow-Noise (40 μV_RMS, TPS79630)
• Fast Start-Up Time (50 μs)
• Stable With a 1-μF Ceramic Capacitor
• Excellent Load and Line Transient Response
• Very Low Dropout Voltage (250 mV at Full Load,
TPS79630)
• 3 × 3 VSON PowerPAD™, SOT223-6, and
TO-263 Packages
2 Applications
• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth^®, Wireless LAN
• Cellular and Cordless Telephones
• Handheld Organizers, PDAs
Ripple Rejection vs Frequency
TPS79630
80
70
I_OUT = 1 mA
60
V_IN = 4 V
C_OUT = 10 mF
C_NR = 0.01 mF
50
I_OUT = 1 A
40
30
20
10
0
1
10 100 1 k 10 k 100 k 1 M 10 M
Frequency (Hz)
3 Description
The TPS796 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, 3 × 3 VSON, SOT223-6, and TO-263
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, 250 mV at 1 A). 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
TPS79630 exhibits approximately 40 μV_RMS of output
voltage noise at 3.0-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, low noise features, and
need fast response time.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
VSON (8)
3.00 mm × 3.00 mm
TPS796
SOT-223 (6)
6.50 mm × 3.50 mm
TO-263 (5)
10.16 mm × 8.42 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Output Spectral Noise Density vs Frequency
TPS79630
0.7
V_IN = 5.5 V
0.6 ^C_OUT ^{= 2.2 mF}
C_NR = 0.1 mF
0.5
0.4
I_OUT = 1 A
0.3
0.2
0.1
I_OUT = 1.5 A
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.