TPS7A88-Q1 Datasheet, PDF (1/41 Pages) Texas Instruments – Automotive, Dual, 1-A, Low-Noise (4 uVRMS) LDO Voltage Regulator

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TPS7A88-Q1
SBVS289A – AUGUST 2017 – REVISED SEPTEMBER 2017
TPS7A88-Q1 Automotive, Dual, 1-A, Low-Noise (4 µV_RMS) LDO Voltage Regulator
1 Features
•1 AEC-Q100 Qualified With the Following Results:
– Temperature Grade 1: –40°C ≤ T_A ≤ +125°C
– HBM ESD Classification Level 2
– CDM ESD Classification Level C5
• Two Independent LDO Channels
• Low Output Noise: 4 µV_RMS (10 Hz to 100 kHz)
• Low Dropout: 230 mV (Maximum) at 1 A
• Wide Input Voltage Range: 1.4 V to 6.5 V
• Wide Output Voltage Range: 0.8 V to 5.15 V
• High Power-Supply Ripple Rejection:
– 70 dB at 100 Hz
– 40 dB at 100 kHz
– 40 dB at 1 MHz
• 1% Accuracy Over Line, Load, and Temperature
• Excellent Load Transient Response
• Adjustable Start-Up Inrush Control
• Selectable Soft-Start Charging Current
• Independent Open-Drain Power-Good (PG)
Outputs
• Stable With a 10-µF or Larger Ceramic Output
Capacitor
• Low Thermal Resistance: R_θJA = 39.8°C/W
• 4-mm × 4-mm Wettable Flank WQFN Package
2 Applications
• RF and Radar Power in Automotive Applications
• Automotive ADAS ECUs
• Telematic Control Units
• Infotainment and Clusters
• High-Speed I/F (PLL and VCO)
3 Description
The TPS7A88-Q1 is a dual, low-noise (4 µV_RMS), low-
dropout (LDO) voltage regulator capable of sourcing
1 A per channel with 250 mV of maximum dropout.
The TPS7A88-Q1 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 5.15 V. The TPS7A88-Q1 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-Q1 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-Q1 is designed to power noise-
sensitive components such as those found in RF,
radar communications, and telematic applications.
The 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. The TPS7A88-
Q1 features wettable flanks for simple optical
inspection.
Device Information⁽¹⁾
PART NUMBER
PACKAGE
BODY SIZE (NOM)
TPS7A88-Q1
WQFN (20)
4.00 mm × 4.00 mm
(1) For all available packages, see the package option addendum
at the end of the data sheet.
VIN1
EN1
VIN2
EN2
Typical Application Diagram
IN1
PG1
EN1
OUT1
TPS7A88-Q1
IN2
EN2
OUT2
PG2
VIN_RF1
Radar
Sensor System
VIN_RF2
Copyright © 2017, Texas Instruments Incorporated
Spectral Noise Density vs Output Voltage
10
V_OUTx = 0.8 V, 3.94 PV_RMS
V_OUTx = 1.2 V, 4.31 PV_RMS
V_OUTx = 1.8 V, 5.1 PV_RMS
1
V_OUTx = 2.5 V, 6.03 PV_RMS
V_OUTx = 3.3 V, 7.43 PV_RMS
V_OUTx = 5.0 V, 10.3 PV_RMS
0.1
0.01
0.001
1E+1
1E+2
1E+3 1E+4 1E+5
Frequency (Hz)
1E+6
1E+7
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.