TPS7A88 Datasheet, PDF (1/33 Pages) Texas Instruments – LDO Voltage Regulator

Product
Folder
Sample &
Buy
Technical
Documents
Tools &
Software
Support &
Community
TPS7A88
SBVS248A – NOVEMBER 2015 – REVISED NOVEMBER 2015
TPS7A88 Dual, 1-A, Low-Noise (3.8-µV_RMS), LDO Voltage Regulator
1 Features
•1 Two Independent LDO Channels
• Low Output Noise: < 3.8 µV_RMS (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 5.0 V
• High Power-Supply Ripple Rejection:
– 75 dB at DC
– 40 dB at 100 kHz
– 40 dB at 1 MHz
• 1.0% Accuracy Over Line, Load, and Temperature
• Excellent Load Transient Response
• Adjustable Start-Up In-Rush Control
• Selectable Soft-Start Charging Current
• Independent Open-Drain Power-Good (PG)
Outputs
• Stable with a 10-µF or Larger Ceramic Output
Capacitor
• 4-mm × 4-mm, 20-Pin WQFN 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
The TPS7A88 is a dual, low-noise (3.8 µV_RMS), low-
dropout (LDO) voltage regulator capable of sourcing
1 A per channel with only 200 mV of maximum
dropout.
The TPS7A88 provides the flexibility of two
independent LDOs and approximately 50% smaller
solution size than two single-channel LDOs. Each
output is adjustable with external resistors from 0.8 V
to 5.0 V. The TPS7A88 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 TPS7A88 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 TPS7A88 is designed to power up noise-
sensitive components such as those found in high-
speed communication, video, medical, or test and
measurement applications. The very low 4-µV_RMS
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.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7A88
WQFN (20)
4.00 mm × 4.00 mm
(1) For all available packages, see the orderable addendum at
the end of the datasheet.
Typical Application Diagram
VIN1
EN1
VIN2
EN2
IN1
PG1
EN1
OUT1
TPS7A88
IN2
EN2
OUT2
PG2
ENABLE
Clock
VDD_VCO
LMK03328
LMX2581
VDD
SCLK
ADC
ENABLE
ADC3xxx
ADC3xJxx
ADS4xJBxx
ADC5xJxx
ADC12Jxxxx
1
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.