描述 Description

The TPS731xx family of low-dropout (LDO) linear voltage regulators uses a new topology: an NMOS pass element in a voltage-follower configuration. This topology is stable using output capacitors with low equivalent series resistance (ESR), and even allows operation without a capacitor. The device also provides high reverse blockage (low reverse current) and ground pin current that is nearly constant over all values of output current.

The TPS731xx uses an advanced BiCMOS process to yield high precision while delivering very low dropout voltages and low ground pin current. Current consumption, when not enabled, is less than 1 μA and ideal for portable applications. The extremely low output noise (30 μVRMS with 0.1-μF CNR) is ideal for powering VCOs. These devices are protected by thermal shutdown and foldback current limit.

特性 Features

? Stable With or Without Capacitors of All Types
? Input Voltage Range of 1.7 V to 5.5 V
? Ultralow Dropout Voltage: 30 mV Typical (150-mA Load)
? Excellent Load Transient Response–With or Without Optional Output Capacitor
? New NMOS Topology Provides Low Reverse Leakage Current
? Low Noise: 30 μVRMS Typical (10 kHz to 100 kHz)
? 0.5% Initial Accuracy
? 1% Overall Accuracy Over Line, Load, and Temperature
? Less Than 1-μA Maximum IQ in Shutdown Mode
? Thermal Shutdown and Specified Minimum and Maximum Current Limit Protection
? Available in Multiple Output Voltage Versions
? Fixed Outputs of 1.20 V to 5 V
? Adjustable Outputs from 1.2 V to 5.5 V
? Custom Outputs Available

? APPLICATIONS
? Smart Grid and Energy
? Building Automation
? Set-Top Boxes
? Medical Equipment
? Test and Measurement
? Point-of-Sale Terminals
? Wireless Infrastructure

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