TPS7A26 500-mA 18-V ultra-low-IQ low-dropout (LDO) linear regulator with power good |


500-mA 18-V ultra-low-IQ low-dropout (LDO) linear regulator with power good


Sample availability

Preproduction samples are available (PTPS7A2601DRVR). Order now


The TPS7A26 low-dropout linear voltage regulator (LDO) introduces a unique combination of a 2.4-V to 18-V input voltage range with very-low quiescent current (IQ). These features help modern appliances meet increasingly stringent energy requirements, and help extend battery life in portable-power solutions.

The TPS7A26 is available in both fixed and adjustable versions. The fixed-voltage version eliminates external resistors and minimizes printed circuit board (PCB) area. For more flexibility or higher output voltages, the adjustable version uses feedback resistors to set the output voltage from 1.24 V to 17.45 V. Both versions have 1% output regulation accuracy that provides precision regulation for most Micro-Controller Units (MCUs).

The TPS7A26 LDO operates more efficiently than standard linear regulators because the maximum dropout voltage is less than 550 mV at 500 mA of current. This maximum dropout voltage allows for 89% efficiency from a 5.6-V input voltage (VIN) to
5.0-V output voltage (VOUT).

The power good (PG) indicator can be used to either hold an MCU in reset until power is good, or for sequencing. The PG pin is an open-drain output; therefore, the pin is easily level-shifted for monitoring by a rail other than VOUT. The built-in current limit and thermal shutdown help to protect the regulator in the event of a load short or fault.




  • Ultra-Low IQ: 2.5 µA
  • Input Voltage: 2.4 V to 18 V
  • Output Voltage Options Available:
    • Fixed: 1.25 V to 5 V
    • Adjustable: 1.24 V to 17.45 V
  • 1% Accuracy Over Temperature
  • Low Dropout: 550 mV (max) at 500 mA
  • Open-Drain Power-Good Output
  • Internal Soft-Start Limits Inrush Current
  • Thermal Shutdown and Overcurrent Protection
  • Operating Junction Temperature: –40°C to +125°C
  • Stable With 1-µF Output Capacitor
  • Packages: WSON-6

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Part number Order Output options Iout (Max) (A) Vin (Max) (V) Vin (Min) (V) Vout (Max) (V) Vout (Min) (V) Package Group Features Regulated outputs (#) Operating temperature range (C) Thermal resistance θJA (°C/W) Noise (uVrms) Approx. price (US$) Rating Output capacitor type PSRR @ 100 KHz (dB) Accuracy (%) Vdo (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
TPS7A26 Order now Adjustable Output     0.5     18     2.4     17.45     1.24     WSON | 6     Enable
Power Good
Soft Start    
1     -40 to 125     73     200     0.49 | 1ku     Catalog     Ceramic     22     1     330     0.0025     See datasheet (WSON)    
TPS7A25 Order now Adjustable Output     0.3     18     2.4     17.64     1.24     WSON | 6     Enable
Power Good
Soft Start    
1     -40 to 125     73     200     0.44 | 1ku     Catalog     Ceramic     22     1     200     0.0025     See datasheet (WSON)