1 Features
1• Low Dropout: 150 mV (Typical) at 4 A
• 0.75% (Maximum) Accuracy Over Line, Load, and
Temperature With BIAS
• Output Voltage Noise:
– 4.4 μVRMS at 0.8-V Output
– 7.7 μVRMS at 5.1-V Output
• Input Voltage Range:
– Without BIAS: 1.4 V to 6.5 V
– With BIAS: 1.1 V to 6.5 V
• ANY-OUT™ Operation:
– Output Voltage Range: 0.8 V to 3.95 V
• Adjustable Operation:
– Output Voltage Range: 0.8 V to 5.1 V
• Power-Supply Ripple Rejection:
– 40 dB at 500 kHz
• Excellent Load Transient Response
• Adjustable Soft-Start In-Rush Control
• Open-Drain Power-Good (PG) Output
• Stable with a 47-μF or Larger Ceramic Output
Capacitor
• θJC = 3.4°C/W
• 3.5-mm × 3.5-mm, 20-Pin VQFN

2 Applications
• Digital Loads: SerDes, FPGAs, and DSPs
• Instrumentation, Medical, and Audio
• High-Speed Analog Circuits:
– VCO, ADC, DAC, and LVDS
• Imaging: CMOS Sensors and Video ASICs
• Test and Measurement

3 Description
The TPS7A85A is a low-noise (4.4 μVRMS), low
dropout linear regulator (LDO) capable of sourcing 4
A with only 240 mV of maximum dropout. The device
output voltage is pin-programmable from 0.8 V to
3.95 V and adjustable from 0.8 V to 5.1 V using an
external resistor divider.
The combination of low-noise (4.4 μVRMS), high-
PSRR, and high output current capability makes the
TPS7A85A ideal to power noise-sensitive
components such as those found in high-speed
communications, video, medical, or test and
measurement applications. The high performance of
the TPS7A85A limits power-supply-generated phase
noise and clock jitter, making this device ideal for
powering high-performance serializer and deserializer
SerDes), analog-to-digital converters (ADCs), digitalto-
analog converters (DACs), and RF components.
Specifically, RF amplifiers benefit from the highperformance
and 5.1-V output capability of the
device.
For digital loads (such as application-specific
integrated circuits (ASICs), field-programmable gate
arrays (FPGAs), and digital signal processors
DSPs)) requiring low-input voltage, low-output (LILO)
voltage operation, the exceptional accuracy (0.75%
over load and temperature), remote sensing,
excellent transient performance, and soft-start
capabilities of the TPS7A85A ensure optimal system
performance.
The versatility of the TPS7A8500A makes the device
a component of choice for many demanding
applications.