TPS7A39 Datasheet, PDF (1/43 Pages) Texas Instruments – Dual, 150-mA, Wide VIN Positive and Negative LDO Voltage Regulator

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TPS7A39
SBVS263 – JULY 2017
TPS7A39 Dual, 150-mA, Wide V_IN Positive and Negative LDO Voltage Regulator
1 Features
•1 Positive and Negative LDOs in One Package
• Wide Input Voltage Range: ±3.3 V to ±33 V
• Wide Output Voltage Range:
– Positive Range: 1.2 V to 30 V
– Negative Range: –30 V to 0 V
• Output Current: 150 mA per Channel
• Monotonic Start-Up Tracking
• High Power-Supply Rejection Ratio (PSRR):
– 69 dB (120 Hz)
– ≥ 50 dB (10 Hz to 2 MHz)
• Output Voltage Noise: 21 µV_RMS (10 Hz–100 kHz)
• Buffered 1.2-V Reference Output
• Stable With a 10-µF or Larger Output Capacitor
• Single Positive-Logic Enable
• Adjustable Soft-Start In-Rush Control
• 3-mm × 3-mm, 10-Pin WSON Package
• Low Thermal Resistance: R_θJA = 44.4°C/W
• Operating Temperature Range: –40 to +125°C
2 Applications
• Supply Rails for Op Amps, ADCs, DACs, and
Other High-Precision Analog Circuitry
• Post DC-DC Regulation and Filtering
• Analog I/O Modules
• Test and Measurement
• Rx, Tx, and PA Circuitry
• Industrial Instrumentation
• Medical Imaging
3 Description
The TPS7A39 device is a dual, monolithic, high-
PSRR, positive and negative low-dropout (LDO)
voltage regulator capable of sourcing (and sinking) up
to 150 mA of current. The regulated outputs can be
independently and externally adjusted to symmetrical
or asymmetrical voltages, making this device an ideal
dual, bipolar power supply for signal conditioning.
Both positive and negative outputs of the TPS7A39
ratiometrically track each other during startup to
mitigate floating conditions and other power-supply
sequencing issues common in dual-rail systems. The
negative output can regulate up to 0 V, extending the
common-mode range for single-supply amplifiers.
The TPS7A39 also features high PSRR to eliminate
power-supply noise, such as switching noise, that can
compromise signal integrity.
Both regulators are controlled with a single positive
logic enable pin for interfacing with standard digital
logic. A capacitor-programmable soft-start function
controls in-rush current and start-up time. The internal
reference voltage of the TPS7A39 can be overridden
with an external reference to enable precision
outputs, output voltage margining, or to track other
power supplies. Additionally, the TPS7A39 has a
buffered reference output that can be used as a
voltage reference for other components in the
system.
These features make the TPS7A39 a robust,
simplified solution to power operational amplifiers,
digital-to-analog converters (DACs), and other
precision analog circuitry.
PART NUMBER
TPS7A39
Device Information⁽¹⁾
PACKAGE
BODY SIZE (NOM)
WSON (10)
3.00 mm × 3.00 mm
(1) For all available packages, see the orderable addendum at
the end of the data sheet.
+15 V
+15 V
-15 V
Powering the Signal Chain
+5 V
INP
OUTP
NR/SS
TPS7A39
EN
FBP
BUF
FBN
Feedback
Network
VS+
±
Signal In
+ _VS-
ADC
INN
GND
OUTN
-5 V
1
Monotonic Start-Up Tracking
25
20
EN
V_INP
V_OUTP
V_OUTN
V_INN
15
10
5
0
-5
-10
-15
-20
-25
0
20 40 60 80 100 120 140 160 180 200
Time (ms)
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. ADVANCE INFORMATION for pre-production products; subject to
change without notice.