TPS7A3501_14 Datasheet, PDF (1/24 Pages) Texas Instruments – High PSRR, Low-Noise, 1-A Power Filter

TPS7A3501
www.ti.com
SBVS228A – JULY 2013 – REVISED OCTOBER 2013
High PSRR, Low-Noise, 1-A Power Filter
Check for Samples: TPS7A3501
FEATURES
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•23 Regulates Input-to-Output Voltage:
– User-Programmable Input-to-Output
Voltage Regulation Range:
200 mV to 500 mV
• Power-Supply Rejection Ratio:
– 42 dB at 1 MHz
– ≥ 32 dB (360 kHz to 3.9 MHz)
• Low-Noise Output:
– 3.8 µV_RMS (10 Hz to 100 kHz)
• Output Current: Up to 1 A
• Output Voltage Range: 1.21 V to 4.5 V
• Excellent Load Transient Response
• Stable with Ceramic Capacitors as Low as
10 µF
• Current Limit and Thermal Shutdown for
Fault Protection
• Available in a Low Thermal Resistance
Package: 2-mm × 2-mm SON-6
• Operating Temperature Range:
–40°C to +125°C
APPLICATIONS
• Post DC/DC Converter Ripple Filtering
• Base Stations and Telecom Infrastructure
• Professional Audio
• Communications
• Imaging
• Test and Measurement
• Passive Filter Replacement
DESCRIPTION
The TPS7A3501 is a positive voltage, low-noise
(3.8 µV_RMS) power filter capable of sourcing a 1-A
load suitable for quiet supply solutions. Power filters,
such as the TPS7A3501, provide voltage regulation
across the input and output terminals with high
efficiency (low insertion loss), and power-supply
rejection. The device is ideally-suited as a noise filter
for 3.3-V, 2.5-V, and 1.8-V supplies at up to 1 A.
The input-to-output voltage regulation is also user-
programmable, from 200 mV to 500 mV, with a single
external resistor. If no resistor is used, the
TPS7A3501 provides 330 mV of input-to-output
voltage regulation. The device is stable with 10-µF
input and output ceramic capacitors and a 10-nF
noise-reduction ceramic capacitor.
The TPS7A3501 is fully specified over a wide
temperature of –40°C to +125°C. The device is
offered in a low thermal resistance, 2-mm × 2-mm,
SON-6 package. Unlike passive filters, the
TPS7A3501 provides thermal and current protection
for itself and surrounding circuitry.
V_IN = 3.6 V
C_IN = 10 µF
R_NR
(V_IN – V_OUT) = 300 mV
+
IN
–
OUT
TPS7A3501
EN
SENSE
NR
GND
C_NR = 1 µF
V_OUT = 3.3 V
C_OUT = 10 µF
Load
Figure 1. TPS7A3501 Typical Application Circuit
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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.
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All other trademarks are the property of their respective owners.
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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 © 2013, Texas Instruments Incorporated