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TPS72012DRVT

350-mA, low-VIN (1.1-V), high-PSRR, low-IQ, low-dropout voltage regulator with enable

Manufacturer:

Texas Instruments, Inc
Mfr.Part #:

TPS72012DRVT
Datasheet:

TPS72012DRVT Datasheet (PDF)
Output Configuration:

Positive
Output Type:

Fixed
Number of Regulators:

1
Voltage - Input (Max):

4.5V
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TPS72012DRVT General Description

The TPS720 family of dual rail, low-dropout linear regulators (LDOs) offers outstanding ac performance (PSRR, load and line transient response), while consuming 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 quiescent current of the LDO) 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, which can be a lower voltage than V_BIAS; it 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 supports a novel feature in which 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 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 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 uses a precision voltage reference and feedback loop to achieve overall accuracy of 2% over load, line, process, and temperature extremes. An ultra-small DSBGA package makes the TPS720 ideal for handheld applications. The TPS720 is also available in a SON-8 package. This family of devices is fully specified over the temperature range of
T_J = –40°C to 125°C.

Key Features

350-mA High-Performance LDO
Low Quiescent Current: 38 µA
Excellent Load Transient Response:
±15 mV for I_LOAD = 0 mA to 350 mA in 1 µs
Excellent Line Transient Response:
ΔV_OUT = ±2 mV for ΔV_BIAS = ±600 mV in 1 µs
ΔV_OUT = ±200 µV for ΔV_IN = ±400 mV 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 2.2-µF Output Capacitor
Available in 1.33 mm × 0.96 mm DSBGA-5 and 2 mm × 2 mm SON-6 Packages

Specifications

Category	Integrated Circuits (ICs)Power Management (PMIC)Voltage Regulators - Linear	Series	-
Output Configuration	Positive	Output Type	Fixed
Number of Regulators	1	Voltage - Input (Max)	4.5V
Voltage - Output (Min/Fixed)	1.2V	Voltage - Output (Max)	-
Voltage Dropout (Max)	0.2V @ 350mA	Current - Output	350mA
Current - Quiescent (Iq)	38 µA	Current - Supply (Max)	80 µA
PSRR	85dB ~ 50dB (10Hz ~ 1MHz)	Control Features	Enable
Protection Features	Over Current, Over Temperature, Under Voltage Lockout (UVLO)	Operating Temperature	-40°C ~ 125°C (TJ)
Mounting Type	Surface Mount	Base Product Number	TPS72012
Output options	Fixed Output	Iout (max) (A)	0.35
Vin (max) (V)	4.5	Vin (min) (V)	1.1
Vout (max) (V)	1.8	Vout (min) (V)	0.9
Fixed output options (V)	0.9, 1, 1.1, 1.2, 1.3, 1.32, 1.5, 1.7, 1.8, 2.3	Noise (µVrms)	48
Iq (typ) (mA)	0.038	Thermal resistance θJA (°C/W)	67
Rating	Catalog	Load capacitance (min) (µF)	2.2
Regulated outputs (#)	1	Features	Enable, Soft start
Accuracy (%)	2	PSRR at 100 KHz (dB)	55
Dropout voltage (Vdo) (typ) (mV)	110	Operating temperature range (°C)	-40 to 125
feature-type	LDO	feature-number-of-outputs	1
feature-polarity	Positive	feature-accuracy-	±2
feature-process-technology	BiCMOS	feature-output-type	Fixed
feature-output-voltage-v	1.2	feature-maximum-output-current-a	0.35
feature-minimum-input-voltage-v	1.1	feature-maximum-input-voltage-v	4.5
feature-maximum-dropout-voltage-current-v	0.2@350mA	feature-line-regulation	16uV/V(Typ)
feature-load-regulation	-15uV/mA(Typ)	feature-maximum-power-dissipation-mw
feature-packaging	Tape and Reel	feature-rad-hard	No
feature-pin-count	6	feature-cecc-qualified	No
feature-esd-protection	Yes	feature-escc-qualified
feature-military	No	feature-aec-qualified	No
feature-aec-qualified-number		feature-eccn-code	EAR99
feature-svhc	No	feature-svhc-exceeds-threshold	No