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Output Current – A

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Reference

Design

TPS7A4501, TPS7A4515, TPS7A4518, TPS7A4525, TPS7A4533

SLVS720F – JUNE 2008 – REVISED NOVEMBER 2015

TPS7A45xx Low-Noise Fast-Transient-Response 1.5-A Low-Dropout Voltage Regulators

1 Features

3 Description

The TPS7A45xx devices are low-dropout (LDO)

1

•

Optimized for Fast Transient Response

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

current is 1 mA, dropping to less than 1

μA in

•

Dropout Voltage: 300 mV

shutdown. Quiescent current is well controlled; it does

•

Low Noise: 35

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

regulators have very-low output noise, which makes

•

1-mA Quiescent Current

them ideal for sensitive RF supply applications.

•

No Protection Diodes Needed

Output voltage range is from 1.21 to 20 V. The

•

Controlled Quiescent Current in Dropout

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.

Internal protection circuitry includes reverse-battery

•

Less Than 1-

μA Quiescent Current in Shutdown

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.

2 Applications

Device Information(1)

•

Industrial

PART NUMBER

PACKAGE

BODY SIZE (NOM)

•

Wireless Infrastructure

SOT-223 (6)

6.50 mm × 7.06 mm

TPS7A45xx

•

Radio-Frequency Systems

TO-263 (5)

10.16 mm × 15.24 mm

(1) For all available packages, see the orderable addendum at

the end of the data sheet.

Simplified Schematic

Dropout Voltage vs Output Current

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.