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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
Ripple Rejection (dB) Output Spectral Noise Density (mV/ÖHz)
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 μVRMS, 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
IOUT = 1 mA
60
VIN = 4 V COUT = 10 mF CNR = 0.01 mF
50 IOUT = 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 μVRMS 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 VIN = 5.5 V
0.6 COUT = 2.2 mF CNR = 0.1 mF
0.5
0.4 IOUT = 1 A
0.3
0.2
0.1 IOUT = 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.
TPS79601, TPS79613, TPS79618, TPS79625 TPS79628, TPS79630, TPS79633, TPS79650
SLVS351P – SEPTEMBER 2002 – REVISED MARCH 2015
www.ti.com
Table of Contents
1 Features .................................................................. 1 2 Applications ........................................................... 1 3 Description ............................................................. 1 4 Revision History..................................................... 2 5 Pin Configuration and Functions ......................... 3 6 Specifications......................................................... 4
6.1 Absolute Maximum Ratings ...................................... 4 6.2 ESD Ratings ............................................................ 4 6.3 Recommended Operating Conditions....................... 4 6.4 Thermal Information .................................................. 5 6.5 Electrical Characteristics........................................... 6 6.6 Typical Characteristics .............................................. 7 7 Detailed Description ............................................ 11 7.1 Overview ................................................................. 11 7.2 Functional Block Diagrams ..................................... 11 7.3 Feature Description................................................. 12 7.4 Device Functional Modes........................................ 13 8 Application and Implementation ........................ 14
8.1 Application Information............................................ 14 8.2 Typical Application .................................................. 14 8.3 Do's and Don'ts ...................................................... 17 9 Power Supply Recommendations...................... 17 10 Layout................................................................... 17 10.1 Layout Guidelines ................................................. 17 10.2 Layout Examples................................................... 18 10.3 Thermal Considerations ........................................ 19 10.4 Estimating Junction Temperature ........................ 20 11 Device.