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TPS745-Q1 ACTIVE Automotive 500-mA, low-IQ, high-PSRR, low-dropout (LDO) voltage regulator with power good Alternative AEC-Q100 qualified version with lower-noise and higher accuracy

Product details


Output options Fixed Output Iout (Max) (A) 0.01 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, 3, 3.3 Noise (uVrms) 600 Iq (Typ) (mA) 0.001 Thermal resistance θJA (°C/W) 314 Load capacitance (Min) (µF) 0.47 Rating Automotive Regulated outputs (#) 1 Features Power Good Accuracy (%) 4 Dropout voltage (Vdo) (Typ) (mV) 110 Operating temperature range (C) -40 to 125 open-in-new Find other Linear & low-dropout (LDO) regulators

Package | Pins | Size

SOT-SC70 (DCK) 5 4 mm² 2 x 2.1 open-in-new Find other Linear & low-dropout (LDO) regulators


  • Qualified for Automotive Applications
  • 10-mA Low-Dropout Regulator
  • Ultralow 1.2-µA Quiescent Current at 10 mA
  • 5-Pin SC70/SOT-323 (DCK) Package
  • Integrated Power Good Output
  • Stable With Any Capacitor (>0.47 µF)
  • Dropout Voltage Typically 105 mV at 10 mA (TPS79733)
  • Over Current Limitation
  • –40°C to 125°C Operating Junction Temperature Range
    • Battery Powered Microcontrollers and Microprocessors

open-in-new Find other Linear & low-dropout (LDO) regulators


The TPS797xx family of low-dropout (LDO) voltage regulators offers the benefits of low-dropout voltage and ultralow-power operation. The device is stable with any capacitor (>0.47 µF). Therefore, implementations of this device require 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’s low dropout and ultralow-powered operation results 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 The usual PNP pass transistor has been replaced by a PMOS pass element.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 low, typically 105 mV at 10 mA of load current and is directly proportional to the load current. The quiescent current is ultralow (1.2 µA typically) and is stable over the entire range of output load current (0 mA to 10 mA). When properly configured with a pullup resistor, the PG output can be used to implement a power-on reset or low battery indicator. The TPS797xx is offered in 1.8-V, 3-V, and 3.3-V fixed options.

open-in-new Find other Linear & low-dropout (LDO) regulators

Technical documentation

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Type Title Date
* Data sheet TPS7971xx-Q1: Ultralow-Power SC70/SOT-323 Pkgd 10 mA LDO Linear Regulators datasheet (Rev. A) Jun. 23, 2008
Application note LDO Noise Demystified (Rev. B) Aug. 18, 2020
Application note LDO PSRR Measurement Simplified (Rev. A) Aug. 09, 2017

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SC70 (DCK) 5 View options

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