TPS73733DCQ 3.3V 1A Ultra-Low Noise (30μVRMS) LDO with High PSRR (75dB) 1% Accuracy Low Dropout (310mV) Enable Pin Stable with 1μF Ceramic Current/Thermal Protection in TO-263 Package

TPS73733DCQ 3.3V 1A Ultra-Low Noise (30andmu;VRMS) LDO with High PSRR (75dB) 1% Accuracy Low Dropout (310mV) Enable Pin Stable with 1andmu;F Ceramic Current/Thermal Protection in TO-263 Package

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Features

andbull; Stable with 1andmu;F or larger ceramic output capacitor

andbull; Input voltage range: 2.2V to 5.5V

andbull; Ultra-low dropout voltageandndash; Legacy silicon: 130mV typical at 1Aandndash; New silicon: 122mV typical at 1A

andbull; Excellent load transient responseandmdash;even with only 1andmu;F output capacitor

andbull; NMOS topology delivers low reverse leakage current

andbull; Initial accuracy: 1%

andbull; Overall accuracy over line, load, and temperatureandndash; Legacy silicon: 3%andndash; New silicon: 1.5%

andbull; Less than 20nA typical IQ in shutdown mode

andbull; Thermal shutdown and current limit for fault protection

andbull; Available in multiple output voltage versions:andndash; Adjustable output: 1.20V to 5.5Vandndash; Custom outputs available using factory package-level programming

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Applications

andbull; Point-of-load regulation for DSPs, FPGAs,andnbsp;and microprocessors

andbull; Post-regulation for switching supplies

andbull; Portable and battery-powered equipment

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Description

The TPS737 linear low-dropout (LDO) voltage regulator uses an NMOS pass transistor in a voltage follower configuration. This topology is relatively insensitive to the output capacitor value and ESR, allowing for a wide variety of load configurations. Load transient response is excellent, even with a small 1andmu;F ceramic output capacitor. The NMOS topology also allows for very low dropout.

The TPS737 uses an advanced BiCMOS process to yield high precision while delivering very low dropout voltages and low ground pin current. Devices that use the latest manufacturing flow have an updated design with new silicon on the latest TI process technology. Current consumption, when not enabled, is less than 20nA and is designed for portable applications. This device is protected by thermal shutdown and foldback current limit.

For applications that require higher output voltage accuracy, consider TIand#39;s TPS7A37 1% overall accuracy, 1A low-dropout voltage regulator.

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INFORMATION

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Drawing

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