TPS720-Q1 Datasheet, PDF (1/25 Pages) Texas Instruments – RF Low-Dropout Linear Regulator

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TPS720-Q1
SBVS278 – FEBRUARY 2016
TPS720-Q1
350-mA, Ultra-Low V_IN, RF Low-Dropout Linear Regulator With BIAS Pin
1 Features
•1 Qualified for Automotive Applications
• AEC-Q100 Qualified With the Following Results:
– Device Temperature Grade 1: –40°C to 125°C
Ambient Operating Temperature Range
– Device HBM ESD Classification Level H2
– Device CDM ESD Classification Level C6
• Input Voltage Range: 1.1 V to 4.5 V
• Output Voltage Range: 0.9 V to 3.0 V
• High-Performance LDO: 350 mA
• Low Quiescent Current: 38 μA
• Excellent Load Transient Response:
±15 mV for I_LOAD = 0 mA to 350 mA in 1 μs
• Low Noise: 48 μV_RMS (10 Hz to 100 kHz)
• 80-dB V_IN PSRR (10 Hz to 10 kHz)
• 70-dB V_BIAS PSRR (10 Hz to 10 kHz)
• Fast Start-Up Time: 140 μs
• Built-In Soft-Start With Monotonic V_OUT Rise and
Start-Up Current Limited to 100 mA + I_LOAD
• Overcurrent and Thermal Protection
• Low Dropout: 110 mV at I_LOAD = 350 mA
• Stable with a 2.2-μF Output Capacitor
• Package: 2-mm × 2-mm, 6-Pin WSON
2 Applications
• Camera Modules
• FPD Link Power
• Automotive Infotainment
• USB HUB Power
Simplified Schematic
3 Description
The TPS720-Q1 family of dual-rail, low-dropout linear
regulators (LDOs) offers outstanding ac performance
(PSRR, load and line transient response) and
consume a very low quiescent current of 38 μA.
The V_BIAS rail that powers the control circuit of the
LDO draws very low current (on the order of the LDO
quiescent current) and can be connected to any
power supply that is equal to or greater than 1.4 V
above the output voltage. The main power path is
through V_IN and can be a lower voltage than V_BIAS;
this path can be as low as V_OUT + V_DO, increasing the
efficiency of the solution in many power-sensitive
applications. For example, V_IN can be an output of a
high-efficiency, dc-dc, step-down regulator.
The TPS720-Q1 supports a novel feature where the
output of the LDO regulates under light loads when
the IN pin is left floating. The light-load drive current
is sourced from V_BIAS under this condition. This
feature is particularly useful in power-saving
applications where the dc-dc converter connected to
the IN pin is disabled but the LDO is still required to
regulate the voltage to a light load.
The TPS720-Q1 is stable with ceramic capacitors and
uses an advanced BICMOS fabrication process that
yields a dropout of 110 mV at a 350-mA output load.
The TPS720-Q1 has the unique feature of providing a
monotonic V_OUT rise (overshoot limited to 3%) with
V_IN inrush current limited to 100 mA + I_LOAD with an
output capacitor of 2.2 μF.
The TPS720-Q1 uses a precision voltage reference
and feedback loop to achieve overall accuracy of 2%
over load, line, process, and temperature extremes.
The TPS720-Q1 is available in a 6-pin WSON
package. This family of devices is fully specified over
the temperature range of T_J = –40°C to 125°C.
Standalone
DC-DC
Converter
or PMU
V_BATT
C_BIAS
2.3 V
C_IN
BIAS
IN
OUT
TPS720-Q1
EN
GND
1.8 V
V_CORE
C_OUT
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS720-Q1
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_EN
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.