TPS7A80XX Datasheet, PDF (1/20 Pages) Texas Instruments – Low-Noise, High-Bandwidth PSRR, Low-Dropout 1A Linear Regulator

TPS7A80xx
www.ti.com
SBVS135A – JUNE 2010 – REVISED JUNE 2010
Low-Noise, High-Bandwidth PSRR,
Low-Dropout 1A Linear Regulator
Check for Samples: TPS7A80xx
FEATURES
1
•2 Low-Dropout 1A Regulator with Enable
• Available in Multiple Output Versions:
– Fixed Output Voltages: 0.8V to 5.0V Using
Innovative Factory EEPROM Programming
– Adjustable Output Voltages: 0.8V to 6.0V
• Ultra-High PSRR:
– 63dB at 1kHz
– 57dB at 100kHz
– 38dB at 1MHz
• Low Noise: 15.6 × V_OUT mV_RMS typical (100Hz to
100kHz)
• Stable with a 4.7mF Ceramic Capacitor
• Excellent Load/Line Transient Response
• 3% Overall Accuracy (over Load/Line/Temp)
• Over-Current and Over-Temperature
Protection
• Very Low Dropout: 170mV Typical at 1A
• 3mm × 3mm SON-8 DRB Package
APPLICATIONS
• Telecom Infrastructure
• Audio
• High-Speed I/F (PLL/VCO)
DRB PACKAGE
3mm x 3mm SON
(TOP VIEW)
OUT 1
OUT 2
FB/SNS 3
GND 4
8 IN
7 IN
6 NR
5 EN
DESCRIPTION
The TPS7A80xx family of low-dropout linear
regulators (LDOs) offer very high power-supply ripple
rejection (PSRR) at the output. This series of LDOs
uses an advanced BiCMOS process and a
PMOSFET pass device to achieve very low noise,
excellent transient response, and excellent PSRR
performance.
The TPS7A80xx is stable with a 4.7mF ceramic output
capacitor, and uses a precision voltage reference and
feedback loop to achieve a worst-case accuracy of
3% over all load, line, process, and temperature
variations.
This device is fully specified over the temperature
range of T_J = –40°C to +125°C and is offered in a
3mm × 3mm, SON-8 package with a thermal pad.
Typical Application Circuit for Fixed Voltage Versions
Optional 1.0mF input capacitor.
May improve source impedance,
noise, or PSRR.
V_IN
IN
OUT
TPS7A8001
EN
FB
GND NR
V_OUT
R₁
4.7mF
Ceramic
R₂
V_EN
To avoid inrush current,
it is recommended to
always connect a
1nF to 10nF capacitor
TYPICAL POWER-SUPPLY RIPPLE REJECTION
90
80
70
60
50
40
30
20
10
10
I_OUT = 10mA
I_OUT = 100mA
I_OUT = 750mA
I_OUT = 1A
100
1k
10k
100k
Frequency (Hz)
V_DO = 1.0V
No C_IN
1M
10M
1
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Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2
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 © 2010, Texas Instruments Incorporated