TPS791 Ultralow Noise, High PSRR, Fast RF 100-mA Low-Dropout Linear Regulators | TI.com

TPS791 (ACTIVE) Ultralow Noise, High PSRR, Fast RF 100-mA Low-Dropout Linear Regulators

 

Description

The TPS791 device is a low-dropout (LDO) low-power linear voltage regulator that features high power-supply rejection ratio (PSRR), ultralow noise, fast start-up, and excellent line and load transient responses in a small outline, SOT23 package. The device is stable, with a small 1-µF ceramic capacitor on the output. The TPS791 uses an advanced, proprietary BiCMOS fabrication process to yield extremely low dropout voltages (for example, 38 mV at 100 mA, TPS79147). This device achieves fast start-up times (approximately 63 µs with a 0.001-µF bypass capacitor) while consuming very low quiescent current (170 µA typical). Moreover, when the device is placed in standby mode, the supply current is reduced to less than 1 µA. The TPS79118 exhibits approximately 15 µVRMS of output voltage noise with a 0.1-µF bypass capacitor. Applications with analog components that are noise sensitive, such as portable RF electronics, benefit from the high PSRR and low noise features as well as the fast response time.






Features

  • 100-mA Low-Dropout Regulator With EN
  • Available in 1.8-V, 3.3-V, 4.7-V, and Adj.
  • High PSRR (70 dB at 10 kHz)
  • Ultralow Noise (15 µVRMS)
  • Fast Start-Up Time (63 µs)
  • Stable With Any 1-µF Ceramic Capacitor
  • Excellent Load, Line Transient
  • Very Low Dropout Voltage (38 mV at Full Load, TPS79147)
  • 5-Pin SOT23 (DBV) Package
  • TPS792xx Provides EN Options

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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) Fixed output options (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)
TPS791 Order now Adjustable Output
Fixed Output    
0.1     5.5     2.7     5.2     1.2     1.8
3.3
4.7    
SOT-23 | 5
SOT-23 | 6    
Enable     1     -40 to 125     178     15     0.46 | 1ku     Catalog     45     2     38     0.17     5SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 5)
6SOT-23: 5 mm2: 1.6 x 2.9 (SOT-23 | 6)