TPS7A45

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1.5-A, 20-V, ultra-low-dropout voltage regulator with reverse current protection & enable

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Data sheet

document-pdfAcrobat TPS7A45xx Low-Noise Fast-Transient-Response 1.5-A Low-Dropout Voltage Regulators datasheet (Rev. F) PDF | HTML

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TPS7A45

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Data sheet

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Product details

Output options

Adjustable Output, Fixed Output

Iout (max) (A)

1.5

Vin (max) (V)

20

Vin (min) (V)

2.1

Vout (max) (V)

20

Vout (min) (V)

1.5

Fixed output options (V)

1.5, 1.8, 2.5, 3.3

Rating

Catalog

Noise (µVrms)

35

PSRR at 100 KHz (dB)

38

Iq (typ) (mA)

1

Thermal resistance θJA (°C/W)

28

Load capacitance (min) (µF)

10

Regulated outputs (#)

1

Features

Enable, Reverse Current Protection

Accuracy (%)

2.5

Dropout voltage (Vdo) (typ) (mV)

300

Operating temperature range (°C)

-40 to 125

Output options

Adjustable Output, Fixed Output

Iout (max) (A)

1.5

Vin (max) (V)

20

Vin (min) (V)

2.1

Vout (max) (V)

20

Vout (min) (V)

1.5

Fixed output options (V)

1.5, 1.8, 2.5, 3.3

Rating

Catalog

Noise (µVrms)

35

PSRR at 100 KHz (dB)

38

Iq (typ) (mA)

1

Thermal resistance θJA (°C/W)

28

Load capacitance (min) (µF)

10

Regulated outputs (#)

1

Features

Enable, Reverse Current Protection

Accuracy (%)

2.5

Dropout voltage (Vdo) (typ) (mV)

300

Operating temperature range (°C)

-40 to 125

SOT-223 (DCQ)

6

45.89 mm² 6.5 x 7.06

TO-263 (KTT)

5

154.8384 mm² 10.16 x 15.24

Optimized for Fast Transient Response
Output Current: 1.5 A
High Output Voltage Accuracy: 1% at 25°C
Dropout Voltage: 300 mV
Low Noise: 35 µV_RMS (10 Hz to 100 kHz)
High Ripple Rejection: 68 dB at 1 kHz
1-mA Quiescent Current
No Protection Diodes Needed
Controlled Quiescent Current in Dropout
Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V
Adjustable Output from 1.21 V to 20 V (TPS7A4501 Only)
Less Than 1-µA Quiescent Current in Shutdown
Stable With 10-µF Ceramic Output Capacitor
Reverse-Battery Protection
Reverse Current Protection

Optimized for Fast Transient Response
Output Current: 1.5 A
High Output Voltage Accuracy: 1% at 25°C
Dropout Voltage: 300 mV
Low Noise: 35 µV_RMS (10 Hz to 100 kHz)
High Ripple Rejection: 68 dB at 1 kHz
1-mA Quiescent Current
No Protection Diodes Needed
Controlled Quiescent Current in Dropout
Fixed Output Voltages: 1.5 V, 1.8 V, 2.5 V, 3.3 V
Adjustable Output from 1.21 V to 20 V (TPS7A4501 Only)
Less Than 1-µA Quiescent Current in Shutdown
Stable With 10-µF Ceramic Output Capacitor
Reverse-Battery Protection
Reverse Current Protection

The TPS7A45xx devices are low-dropout (LDO) regulators optimized for fast transient response. The device can supply 1.5 A of output current with a dropout voltage of 300 mV. Operating quiescent current is 1 mA, dropping to less than 1 µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as with many other regulators. In addition to fast transient response, the TPS7A45xx regulators have very-low output noise, which makes them ideal for sensitive RF supply applications.

Output voltage range is from 1.21 to 20 V. The TPS7A45xx regulators are stable with output capacitance as low as 10 µF. Small ceramic capacitors can be used without the necessary addition of ESR as is common with other regulators. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse-current protection. The devices are available in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, 3.3 V, and as an adjustable device with a 1.21-V reference voltage.

The TPS7A45xx devices are low-dropout (LDO) regulators optimized for fast transient response. The device can supply 1.5 A of output current with a dropout voltage of 300 mV. Operating quiescent current is 1 mA, dropping to less than 1 µA in shutdown. Quiescent current is well controlled; it does not rise in dropout as with many other regulators. In addition to fast transient response, the TPS7A45xx regulators have very-low output noise, which makes them ideal for sensitive RF supply applications.

Output voltage range is from 1.21 to 20 V. The TPS7A45xx regulators are stable with output capacitance as low as 10 µF. Small ceramic capacitors can be used without the necessary addition of ESR as is common with other regulators. Internal protection circuitry includes reverse-battery protection, current limiting, thermal limiting, and reverse-current protection. The devices are available in fixed output voltages of 1.5 V, 1.8 V, 2.5 V, 3.3 V, and as an adjustable device with a 1.21-V reference voltage.

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Technical documentation

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	Type	Title		Date
*	Data sheet	TPS7A45xx Low-Noise Fast-Transient-Response 1.5-A Low-Dropout Voltage Regulators datasheet (Rev. F)	PDF \| HTML	18 Nov 2015
	Application note	LDO Noise Demystified (Rev. B)	PDF \| HTML	18 Aug 2020
	Application note	Using Thermal Calculation Tools for Analog Components (Rev. A)		30 Aug 2019
	Application note	A Topical Index of TI LDO Application Notes (Rev. F)		27 Jun 2019
	Application note	LDO PSRR Measurement Simplified (Rev. A)	PDF \| HTML	09 Aug 2017
	EVM User's guide	TPS7A45xxEVM-385 (Rev. A)		08 Oct 2008

Design & development

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Evaluation board

TPS7A4501EVM-385 — TPS7A4501EVM-385 Evaluation Module

The TPS7A4501EVM-385 facilitates evaluation of the TPS7A4501 1.5A Low-Noise, Fast-Transient-Response Low-Dropout Regulator. The EVM allows the user to apply different input voltage levels (2.5V to 20V) and different loads (0 to 1.5A) and check the regulated output voltage for stability.

User guide: PDF