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TPS745 ACTIVE 500-mA, low-IQ, high-accuracy, adjustable ultra-low-dropout voltage regulator with power good Alternative product offering lower noise and higher accuracy

Product details

Output options Fixed Output Iout (Max) (A) 0.05 Vin (Max) (V) 5.5 Vin (Min) (V) 1.8 Vout (Max) (V) 3.3 Vout (Min) (V) 1.8 Fixed output options (V) 1.8, 2.85, 3, 3.3 Noise (uVrms) 600 Iq (Typ) (mA) 0.001 Thermal resistance θJA (°C/W) 231 Rating Catalog Load capacitance (Min) (µF) 0.47 Regulated outputs (#) 1 Features Power Good Accuracy (%) 4 Dropout voltage (Vdo) (Typ) (mV) 105 Operating temperature range (C) -40 to 85
Output options Fixed Output Iout (Max) (A) 0.05 Vin (Max) (V) 5.5 Vin (Min) (V) 1.8 Vout (Max) (V) 3.3 Vout (Min) (V) 1.8 Fixed output options (V) 1.8, 2.85, 3, 3.3 Noise (uVrms) 600 Iq (Typ) (mA) 0.001 Thermal resistance θJA (°C/W) 231 Rating Catalog Load capacitance (Min) (µF) 0.47 Regulated outputs (#) 1 Features Power Good Accuracy (%) 4 Dropout voltage (Vdo) (Typ) (mV) 105 Operating temperature range (C) -40 to 85
SOT-SC70 (DCK) 5 4 mm² 2 x 2.1
  • 50-mA Low-Dropout Regulator
  • Ultra-Low 1.2-µA Quiescent Current at 10 mA
  • 5-Pin SC70 (DCK) Package
  • Integrated Power Good Output
  • Stable With Any Capacitor Greater Than 0.47 µF
  • Typical Dropout Voltage of 105 mV at 10 mA (TPS79733)
  • Over-Current Limitation
  • Operating Junction Temperature Range of –40°C to 85°C
  • 50-mA Low-Dropout Regulator
  • Ultra-Low 1.2-µA Quiescent Current at 10 mA
  • 5-Pin SC70 (DCK) Package
  • Integrated Power Good Output
  • Stable With Any Capacitor Greater Than 0.47 µF
  • Typical Dropout Voltage of 105 mV at 10 mA (TPS79733)
  • Over-Current Limitation
  • Operating Junction Temperature Range of –40°C to 85°C

The TPS797xx family of low-dropout voltage regulators (LDOs) offers the benefits of low-dropout voltage and ultra-low-power operation. The device is stable with any capacitor greater than 0.47-µF. Therefore, implementations of this device require very little board space due to the miniaturized packaging and potentially small output capacitor. In addition, the family includes an integrated open drain active-high power good (PG) output. Intended for use in microcontroller-based, battery-powered applications, the TPS797xx family low dropout and ultra-low-power operation result in a significant increase in system battery operating life. The small packaging minimizes consumption of board space.

The device is enabled when the applied voltage exceeds the minimum input voltage. The usual PNP pass transistor has been replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low (typically, 105 mV at 10-mA of load current), and is directly proportional to the load current. The quiescent current is ultra-low (1.2-µA, typically) and is stable over the entire range of output load current (0 mA to 50 mA). When properly configured with a pullup resistor, the PG output can implement a power-on reset or low-battery indicator.

The TPS797xx family of low-dropout voltage regulators (LDOs) offers the benefits of low-dropout voltage and ultra-low-power operation. The device is stable with any capacitor greater than 0.47-µF. Therefore, implementations of this device require very little board space due to the miniaturized packaging and potentially small output capacitor. In addition, the family includes an integrated open drain active-high power good (PG) output. Intended for use in microcontroller-based, battery-powered applications, the TPS797xx family low dropout and ultra-low-power operation result in a significant increase in system battery operating life. The small packaging minimizes consumption of board space.

The device is enabled when the applied voltage exceeds the minimum input voltage. The usual PNP pass transistor has been replaced by a PMOS pass element. Because the PMOS pass element behaves as a low-value resistor, the dropout voltage is very low (typically, 105 mV at 10-mA of load current), and is directly proportional to the load current. The quiescent current is ultra-low (1.2-µA, typically) and is stable over the entire range of output load current (0 mA to 50 mA). When properly configured with a pullup resistor, the PG output can implement a power-on reset or low-battery indicator.

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Technical documentation

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Type Title Date
* Data sheet TPS797xx Ultra-Low IQ, 50-mA Low-Dropout Linear Regulators With Power Good Output in SC70 Package datasheet (Rev. J) 23 Dec 2016
Technical article 3 quiescent-current (Iq) specifications you need to understand 12 Nov 2021
White paper Understanding the Foundations of Quiescent Current in Linear Power Systems 18 Feb 2021
Application note LDO Noise Demystified (Rev. B) 18 Aug 2020
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 TPS79733EVM LDO Regulator Evaluation Module (Rev. A) 02 Jun 2003

Design & development

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

Evaluation board

TPS79733EVM — TPS79733 Evaluation Module

The purpose of this EVM is to facilitate evaluation of the TPS797xx family of LDO regulators. Each EVM package contains an SLVP199 test board with a TPS79733DCK low dropout linear regulator as well as supporting passive components. Also, the board's small size and side clips facilitate attaching it (...)

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Simulation model

TPS79718 PSpice Transient Model

SLVMB49.ZIP (84 KB) - PSpice Model
Simulation model

TPS79718 Unencrypted PSpice Transient Model

SLVMB50.ZIP (2 KB) - PSpice Model
Simulation model

TPS79733 PSpice Transient Model

SLVMB51.ZIP (85 KB) - PSpice Model
Simulation model

TPS79733 Unencrypted PSpice Transient Model

SLVMB52.ZIP (2 KB) - PSpice Model
Simulation model

TPS79730 Unencrypted PSpice Transient Model

SLVMB53.ZIP (2 KB) - PSpice Model
Simulation model

TPS79730 PSpice Transient Model

SLVMB54.ZIP (85 KB) - PSpice Model
Simulation model

TPS797285 PSpice Transient Model

SLVMB55.ZIP (84 KB) - PSpice Model
Simulation model

TPS797285 Unencrypted PSpice Transient Model

SLVMB56.ZIP (2 KB) - PSpice Model
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SC70 (DCK) 5 View options

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