TPS786_16 Datasheet, PDF (1/37 Pages) Texas Instruments – Ultralow-Noise, High-PSRR, Fast, RF, 1.5-A Low-Dropout Linear Regulators

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TPS786
SLVS389M – SEPTEMBER 2002 – REVISED SEPTEMBER 2015
TPS786 Ultralow-Noise, High-PSRR, Fast, RF, 1.5-A
Low-Dropout Linear Regulators
1 Features
•1 1.5-A Low-Dropout Regulator With Enable
• Available in Fixed and Adjustable (1.2 V to 5.5 V)
Output Versions
• High PSRR (49 dB at 10 kHz)
• Ultralow Noise (48 μV_RMS, TPS78630)
• Fast Start-Up Time (50 μs)
• Stable With a 1-μF Ceramic Capacitor
• Excellent Load and Line Transient Response
• Very Low Dropout Voltage (390 mV at Full Load,
TPS78630)
• 3 × 3 SON PowerPAD™, 6-Pin SOT223 and 5-Pin
DDPAK Package
2 Applications
• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth^®, Wireless LAN
• Cellular and Cordless Telephones
• Handheld Organizers, PDAs
Ripple Rejection vs Frequency
80
70
I_OUT = 1 mA
60
V_IN = 4 V
C_OUT = 10 µF
C_NR = 0.01 µF
50
I_OUT = 1.5 A
40
30
20
10
0
1 10 100 1k 10k 100k 1M 10M
f (Hz)
3 Description
The TPS786 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, SOT223-6 and DDPAK-5 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,
390 mV at 1.5 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 TPS78630 exhibits
approximately 48 μV_RMS of output voltage at 3-V
output noise 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 the fast
response time.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TO-263 (5)
10.16 mm × 8.42 mm
TPS786
SOT-223 (6) 6.50 mm × 3.50 mm
SON (8)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
Output Spectral Noise Density vs
Frequency
0.80
0.70
0.60
V_IN = 5.5 V
C_OUT = 2.2 µF
C_NR = 0.1 µF
0.50
0.40
0.30
I_OUT = 1 mA
0.20
0.10
I_OUT = 1.5 A
0.00
100
1k
10k
Frequency (Hz)
100k
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.