TPS7A3501_15_15 Datasheet, PDF (1/29 Pages) Texas Instruments – TPS7A3501 High PSRR, Low-Noise, 1-A Power Filter

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TPS7A3501
SBVS228B – JULY 2013 – REVISED MARCH 2015
TPS7A3501 High PSRR, Low-Noise, 1-A Power Filter
1 Features
•1 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 WSON-6
• Operating Temperature Range:
–40°C to 125°C
2 Applications
• Post DC-DC Converter Ripple Filtering
• Base Stations and Telecom Infrastructure
• Professional Audio
• Communications
• Imaging
• Test and Measurement
• Passive Filter Replacement
3 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, WSON-6
package. Unlike passive filters, the TPS7A3501
provides thermal and current protection for itself and
surrounding circuitry.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7A3501
WSON (6)
2.00 mm × 2.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
V_IN = 3.6 V
C_IN = 10 µF
R_NR
Typical Application Circuit
(V_IN – V_OUT) = 300 mV
+
IN
–
OUT
V_OUT = 3.3 V
TPS7A3501
C_OUT = 10 µF
EN
SENSE
NR
GND
C_NR = 1 µF
Load
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.