TPS7A4533

Part: TPS7A45xx from Texas Instruments

Type: Low-Dropout Voltage Regulator

Key Specs:

• Output Current: 1.5 A
• High Output Voltage Accuracy: 1% at 25°C
• Dropout Voltage: 300 mV
• Low Noise: 35 µVRMS (10 Hz to 100 kHz)
• High Ripple Rejection: 68 dB at 1 kHz
• Quiescent Current: 1 mA (operating), less than 1 µA (shutdown)
• Adjustable Output Voltage Range: 1.21 V to 20 V
• Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V
• Stable With 10-µF Ceramic Output Capacitor

Features:

• Optimized for Fast Transient Response
• Controlled Quiescent Current in Dropout
• No Protection Diodes Needed
• Reverse-Battery Protection
• Reverse Current Protection
• Current Limiting
• Thermal Limiting

Applications:

• Industrial
• Wireless Infrastructure
• Radio-Frequency Systems
• Sensitive RF supply applications

Package:

• SOT-223 (6): 6.50 mm × 7.06 mm
• TO-263 (5): 10.16 mm × 15.24 mm

Tools & Software

The TPS7A45xx devices are low-dropout (LDO) regulators optimized for fast transient response. The • Output Current: 1.5 ^A device can supply 1.5 ^A of output current with ^a • High Output Voltage Accuracy: 1% at 25°C dropout voltage of 300 mV. Operating quiescent • Dropout Voltage: 300 mV current is 1 mA, dropping to less than 1 μA in shutdown. Quiescent current is well controlled; it does • Low Noise: ^{35 μ}VRMS (10 Hz to ¹⁰⁰ kHz) not rise in dropout as with many other regulators. In • High Ripple Rejection: 68 dB at 1 kHz addition to fast transient response, the TPS7A45xx • 1-mA Quiescent Current regulators have very-low output noise, which makes them ideal for sensitive RF supply applications. • No Protection Diodes Needed

Support & Community

• Controlled Quiescent Current in Dropout Output voltage range is from 1.21 to 20 V. The TPS7A45xx regulators are stable with output • Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V capacitance as low as 10 μF. Small ceramic • Adjustable Output from 1.21 V to 20 V capacitors can be used without the necessary (TPS7A4501 Only) addition of ESR as is common with other regulators. • Less Than 1-μA Quiescent Current in Shutdown Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and • Stable With 10-μF Ceramic Output Capacitor reverse-current protection. The devices are available • Reverse-Battery Protection in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, 3.3 V, • Reverse Current Protection and as an adjustable device with a 1.21-V reference voltage.

• Industrial

1

• Wireless Infrastructure
• • Radio-Frequency Systems TPS7A45xx

Pin Functions

SLVS720F –JUNE 2008–REVISED NOVEMBER 2015 www.ti.com

Over recommended operating temperature range T^J = –40 to 125°C (unless otherwise noted) (1)

(2) Typical values represent the likely parametric nominal values determined at the time of characterization. Typical values depend on the application and configuration and may vary over time. Typical values are not ensured on production material.

• (3) The TPS7A4501 is tested and specified for these conditions with the ADJ pin connected to the OUT pin.
• (4) For the TPS7A4501, TPS7A4515 and TPS7A4518, dropout voltages are limited by the minimum input voltage specification under some output voltage/load conditions.
• (5) Operating conditions are limited by maximum junction temperature. The regulated output voltage specification does not apply for all possible combinations of input voltage and output current. When operating at maximum input voltage, the output current range must be limited. When operating at maximum output current, the input voltage range must be limited.

Copyright © 2008–2015, Texas Instruments Incorporated Submit Documentation Feedback 5

TPS7A4501, TPS7A4515, TPS7A4518, TPS7A4525, TPS7A4533

SLVS720F –JUNE 2008–REVISED NOVEMBER 2015 www.ti.com

over operating virtual-junction temperature range (unless otherwise noted) (1)

(1) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under Recommended Operating Conditions is not implied. Exposure to conditions beyond the recommended operating maximum for extended periods may affect device reliability.

(2) Absolute maximum input-to-output differential voltage cannot be achieved with all combinations of rated IN pin and OUT pin voltages. With the IN pin at 20 V, the OUT pin may not be pulled below 0 V. The total measured voltage from IN to OUT can not exceed ±20 V.

over operating free-air temperature range (unless otherwise noted)

(1) TPS7A4501, TPS7A4515, and TPS7A4518 may require a higher minimum input voltage under some output voltage/load conditions as indicated under Electrical Characteristics.

www.ti.com SLVS720F –JUNE 2008–REVISED NOVEMBER 2015

(1) For more information about traditional and new thermal metrics, see the Semiconductor and IC Package Thermal Metrics application report, SPRA953.

(2) For thermal estimates of this device based on PCB copper area, see the TI PCB Thermal Calculator.