TPS7A25 300-mA 18-V ultra-low-IQ low-dropout (LDO) linear voltage regulator with power good | TI.com

TPS7A25 (ACTIVE) 300-mA 18-V ultra-low-IQ low-dropout (LDO) linear voltage regulator with power good

 

Description

The TPS7A25 low-dropout (LDO) linear voltage regulator introduces a 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 TPS7A25 is available in both fixed and adjustable versions. The fixed-voltage version eliminates external resistors and helps minimize 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 17.64 V. Both versions have a 1% output regulation accuracy that provides precision regulation for most microcontroller (MCU) references.

The TPS7A25 LDO operates more efficiently than standard linear regulators because the maximum dropout voltage is less than 360 mV at 300 mA of current. This maximum dropout voltage allows for 92.5% efficiency from a 5.4-V input voltage (VIN) to a 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 protect the regulator in the event of a load short or fault.

Features

  • Ultra-low IQ: 2 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 17.64 V
  • 1% accuracy over temperature
  • Low dropout: 340 mV (max) at 300 mA
  • Open-drain, power-good output
  • Thermal shutdown and overcurrent protection
  • Active overshoot pulldown
  • Operating junction temperature: –40°C to +125°C
  • Stable with 1-µF output capacitors
  • Package: 6-pin WSON

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Parametrics

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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 PSRR @ 100 KHz (dB) Accuracy (%) Dropout voltage (Vdo) (Typ) (mV) Iq (Typ) (mA) Package size: mm2:W x L (PKG)
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     22     1     200     0.0025     See datasheet (WSON)    
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     22     1     330     0.0025     See datasheet (WSON)