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)
