TPS7A91 1A High-Accuracy Low-Noise Low-Dropout (LDO) Voltage Regulator | TI.com

TPS7A91 (ACTIVE) 1A High-Accuracy Low-Noise Low-Dropout (LDO) Voltage Regulator

 

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Description

The TPS7A91 is a low-noise (4.7 µVRMS), low-dropout (LDO) voltage regulator capable of sourcing 1 A with only 200 mV of maximum dropout.

The TPS7A91 output is adjustable with external resistors from 0.8 V to 5.2 V. The TPS7A91 wide input-voltage range supports operation as low as 1.4 V and up to 6.5 V.

With 1% output voltage accuracy (over line, load, and temperature) and soft-start capabilities to reduce in-rush current, the TPS7A91 is ideal for powering sensitive analog low-voltage devices [such as voltage-controlled oscillators (VCOs), analog-to-digital converters (ADCs), digital-to-analog converters (DACs), high-end processors, and field-programmable gate arrays (FPGAs)].

The TPS7A91 is designed to power noise-sensitive components such as those found in high-speed communication, video, medical, or test and measurement applications. The very low 4.7-µVRMS output noise and wideband PSRR (40 dB at 1 MHz) minimizes phase noise and clock jitter. These features maximize performance of clocking devices, ADCs, and DACs.

Features

  • 1.0% Accuracy Over Line, Load, and Temperature
  • Low Output Noise: 4.7 µVRMS (10 Hz–100 kHz)
  • Low Dropout: 200 mV (max) at 1 A
  • Wide Input Voltage Range: 1.4 V to 6.5 V
  • Wide Output Voltage Range: 0.8 V to 5.2 V
  • High Power-Supply Ripple Rejection (PSRR):
    • 70 dB at DC
    • 40 dB at 100 kHz
    • 40 dB at 1 MHz
  • Fast Transient Response
  • Adjustable Start-Up In-Rush Control with Selectable Soft-Start Charging Current
  • Open-Drain Power-Good (PG) Output
  • 2.5-mm × 2.5-mm, 10-Pin SON Package

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)
TPS7A91 Order now Adjustable Output     1     6.5     1.4     5.2     0.8     SON | 10     Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
1     -40 to 125     57     4.7     1.20 | 1ku     Catalog     48     1     130     2.1     See datasheet (SON)    
TPS7A90 Order now Adjustable Output     0.5     6.5     1.4     5.7     0.8     SON | 10     Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
1     -40 to 125     57     4.7     0.60 | 1ku     Catalog     48     1     75     2.1     See datasheet (SON)    
TPS7A92 Order now Adjustable Output     2     6.5     1.4     5.2     0.8     SON | 10     Enable
Foldback Overcurrent Protection
Output Discharge
Power Good
Soft Start    
1     -40 to 125     57     4.7     1.50 | 1ku     Catalog     48     1     260     2.1     See datasheet (SON)