TPS78601DRBR Datasheet, PDF (1/29 Pages) Texas Instruments – ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 1.5-A LOW-DROPOUT LINEAR REGULATORS

TPS786xx
www.ti.com
SLVS389L – SEPTEMBER 2002 – REVISED OCTOBER 2010
ULTRALOW-NOISE, HIGH-PSRR, FAST, RF, 1.5-A
LOW-DROPOUT LINEAR REGULATORS
Check for Samples: TPS786xx
FEATURES
1
•234 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 mV_RMS, TPS78630)
• Fast Start-Up Time (50 ms)
• Stable With a 1-mF Ceramic Capacitor
• Excellent Load/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
APPLICATIONS
• RF: VCOs, Receivers, ADCs
• Audio
• Bluetooth^® , Wireless LAN
• Cellular and Cordless Telephones
• Handheld Organizers, PDAs
DESCRIPTION
The TPS786xx 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-mF 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 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
TPS78630 exhibits approximately 48 mV_RMS of output
voltage at 3.0-V output noise 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, low noise features, and
the fast response time.
EN
IN
GND
OUT
NR/FB
DRB PACKAGE
3mm x 3mm SON
(TOP VIEW)
DCQ PACKAGE
SOT223-6
(TOP VIEW)
IN 1
IN 2
OUT 3
1
OUT 4
2
6
3
4
GND
8 EN
7 NC
6 GND
5 NR/FB
5
KTT (DDPAK) PACKAGE
(TOP VIEW)
EN
1
IN
2
GND
3
OUT
4
NR/FB
5
TPS78630
RIPPLE REJECTION
vs
FREQUENCY
80
V_IN = 4 V
70
C_OUT = 10 mF
I_OUT = 1 mA
C_NR = 0.01 mF
60
50
I_OUT = 1.5 A
40
30
20
10
0
1 10 100 1k 10k 100k 1M 10M
Frequency (Hz)
TPS78630
OUTPUT SPECTRAL NOISE DENSITY
vs
FREQUENCY
0.8
V_IN = 5.5 V
0.7
C_OUT = 2.2 mF
C_NR = 0.1 mF
0.6
0.5
0.4
I_OUT = 1 mA
0.3
0.2
0.1 ^IOUT ^{= 1.5 A}
0.0
100
1k
10k
Frequency (Hz)
100k
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.
PowerPAD is a trademark of Texas Instruments Inc.
2
Bluetooth is a registered trademark of Bluetooth SIG, Inc.
3
All other trademarks are the property of their respective owners.
4
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 © 2002–2010, Texas Instruments Incorporated