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Product details

Parameters

Output options Adjustable Output Iout (Max) (A) 1 Vin (Max) (V) 6.5 Vin (Min) (V) 1.4 Vout (Max) (V) 5.2 Vout (Min) (V) 0.8 Noise (uVrms) 4.7 Iq (Typ) (mA) 2.1 Thermal resistance θJA (°C/W) 57 Load capacitance (Min) (µF) 22 Rating Catalog Regulated outputs (#) 1 Features Enable, Foldback Overcurrent Protection, Output Discharge, Power Good, Soft Start Accuracy (%) 1 PSRR @ 100 KHz (dB) 48 Dropout voltage (Vdo) (Typ) (mV) 130 Operating temperature range (C) -40 to 125 open-in-new Find other Linear regulators (LDO)

Package | Pins | Size

WSON (DSK) 10 6 mm² 2.5 x 2.5 open-in-new Find other Linear regulators (LDO)

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
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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.

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Technical documentation

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Type Title Date
* Datasheet TPS7A91 1-A, High-Accuracy, Low-Noise LDO Voltage Regulator datasheet Dec. 13, 2016
Technical articles LDO basics: capacitor vs. capacitance Aug. 01, 2018
Technical articles LDO Basics: Preventing reverse current Jul. 25, 2018
Technical articles LDO basics: introduction to quiescent current Jun. 20, 2018
Technical articles LDO basics: noise – part 2 Jul. 25, 2017
User guides TPS7A91EVM-831 Evaluation Module User's Guide Nov. 29, 2016

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARDS Download
document-generic User guide
$29.00
Description
The TPS7A91EVM-831 evaluation module is designed for a typical configuration to evaluate the operation and performance of the TPS7A91, 1A high-accuracy, low dropout voltage regulator. The EVM circuit board is configured to be a reference design for engineering applications requiring current to a (...)
Features
Low Dropout: 200 mV (max) at 1 A
1% (max) Accuracy Over Line, Load, and Temperature
Low Output Noise: 3.8μVRMS (10 Hz–100 kHz)
Adjustable Output Voltage Range: 0.8 V to 5.2 V
High Power-Supply Ripple Rejection: 40 dB at 100 kHz

Design tools & simulation

SIMULATION MODELS Download
SBVM661.ZIP (2 KB) - PSpice Model
SIMULATION MODELS Download
SBVM662.ZIP (92 KB) - PSpice Model

CAD/CAE symbols

Package Pins Download
SON (DSK) 10 View options

Ordering & quality

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