TPS7A90

Clock

SCLK

ADC

OUT

VDD

PG

ENABLE

VDD_VCO

IN

EN

VIN

EN

LMK03328

LMX2581

ADC3xxx

ADC3xJxx

ADC3xJBxx

ADS4xxBxx

ADS5xJxx

ADS12Jxxxx

GND

Copyright © 2017, Texas Instruments Incorporated

1.2 V

2.0 V

OUT

PG

IN

EN

TPS7A90

SS_CTRL

NR/SS

FB

10 PF

10 F

0.1 PF

11.8 k:

5.9 k:

20 k:

PG

GND

Copyright © 2017, Texas Instruments Incorporated

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An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications,

intellectual property matters and other important disclaimers. PRODUCTION DATA.

TPS7A90

SBVS324 – JUNE 2017

TPS7A90

500-mA, High-Accuracy, Low-Noise LDO Voltage Regulator

1

1 Features

1

•

1.0% Accuracy Over Line, Load, and Temperature

•

•

Low Dropout: 100 mV (max) at 0.5 A

•

Wide Input Voltage Range: 1.4 V to 6.5 V

•

Wide Output Voltage Range: 0.8 V to 5.7 V

•

High Power-Supply Rejection Ratio (PSRR):

–

60 dB at DC

–

50 dB at 100 kHz

–

30 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 WSON Package

2 Applications

•

High-Speed Analog Circuits:

–

VCO, ADC, DAC, LVDS

•

Imaging: CMOS Sensors, Video ASICs

•

Test and Measurement

•

Instrumentation, Medical, and Audio

•

Digital Loads: SerDes, FPGA, DSP

3 Description

dropout (LDO) voltage regulator capable of sourcing

500 mA with only 100 mV of maximum dropout to 5 V

and 200 mV to 5.7 V.

The TPS7A90 output is adjustable with external

resistors from 0.8 V to 5.7 V. The TPS7A90 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 TPS7A90 is ideal for powering

sensitive

analog

low-voltage

devices

[such

as

voltage-controlled oscillators (VCOs), analog-to-digital

converters (ADCs), and digital-to-analog converters

(DACs)].

The TPS7A90 is designed to power noise-sensitive

components such as those found in high-speed

communication,

video,

medical,

or

test

and

output noise and wideband PSRR (30 dB at 1 MHz)

minimizes phase noise and clock jitter. These

features maximize performance of clocking devices,

ADCs, and DACs.

Device Information(1)

PART NUMBER

PACKAGE

BODY SIZE (NOM)

TPS7A90

WSON (10)

2.50 mm × 2.50 mm

(1) For all available packages, see the orderable addendum at

the end of the datasheet.

Typical Application Circuit

Typical Application Diagram