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 Noise (uVrms) 35 Iq (Typ) (mA) 1 Thermal resistance θJA (°C/W) 28 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Enable, Reverse Current Protection Accuracy (%) 2.5 PSRR @ 100 KHz (dB) 38 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 Noise (uVrms) 35 Iq (Typ) (mA) 1 Thermal resistance θJA (°C/W) 28 Rating Catalog Load capacitance (Min) (µF) 10 Regulated outputs (#) 1 Features Enable, Reverse Current Protection Accuracy (%) 2.5 PSRR @ 100 KHz (dB) 38 Dropout voltage (Vdo) (Typ) (mV) 300 Operating temperature range (C) -40 to 125
SOT-223 (DCQ) 6 23 mm² 6.5 x 3.5 TO-263 (KTT) 5 155 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 µVRMS (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 µVRMS (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) 18 Nov 2015
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
Application note LDO Noise Demystified (Rev. B) 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) 09 Aug 2017
User guide TPS7A45xxEVM-385 (Rev. A) 08 Oct 2008

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

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.

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Simulation model

TPS7A45 PSpice Transient Model (Rev. A)

SLVM641A.ZIP (74 KB) - PSpice Model
Simulation model

TPS7A4501 TINA-TI Transient Spice Model

SLVM642.ZIP (3 KB) - TINA-TI Spice Model
Simulation model

TPS7A4501 TINA-TI Transient Reference Design

SLVM643.TSC (10 KB) - TINA-TI Reference Design
Package Pins Download
DDPAK/TO-263 (KTT) 5 View options
SOT-223 (DCQ) 6 View options

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