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描述

The LTP7693 is a low-noise (4.4 µVRMS), low-dropout linear regulator (LDO) capable of sourcing 3

A with only 180 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 5.0 V using an external resistor divider.

The combination of low-noise (4.4 µVRMS), high PSRR, and high output current capability makes

the LTP7693 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 LTP7693 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), digital-to-analog converters (DACs), and RF components. Specifically, RF amplifiers benefit

from the high-performance and 5.0-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 LTP7693 ensure optimal

system performance.

The versatility of the LTP7693 makes the device a component of choice for many demanding

applications.


优势和特点

  • Low dropout: 180 mV (max) at 3 A
  • 0.75% (max) accuracy over line, load, and temperature with BIAS
  • Output voltage noise:
    –4.4 µVRMS at 0.8 V output
    –7.7 µVRMS at 5.0 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 Output voltage range: 0.8 V to 5.15 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
  • Package:QFN3.5×3.5-20


应用

  • Macro remote radio units (RRU)
  • Outdoor backhaul units
  • Active antenna system mMIMO (AAS)


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