TPS7A8300RGRR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

TPS7A8300RGRR属于集成电路（IC）的线性+开关稳压器。由德州仪器制造生产的TPS7A8300RGRR稳压器 - 线性线性稳压器用于提供稳定的输出电压，无论负载电流、输入电压或环境因素如何变化，这些输出电压通常都要保持不变。它们的工作原理要求输入电压维持在高于所需的输出电压，而且要超出某个最小量，并且在工作时会将输入端的任何多余电压转换为热量。对于大多数应用而言，虽然这种稳压器的效率低于开关模式的稳压器，但它们通常更适合对噪声高度敏感的应用。

1 Features

1• Ultralow Dropout: 125 mV Maximum at 2 A

• Output Voltage Noise: 6 μV RMS

• Power-Supply Ripple Rejection:

– 40 dB at 1 MHz

• Input Voltage Range:

– Without BIAS: 1.4 V to 6.5 V

– With BIAS: 1.1 V to 6.5 V

• Two Output Voltage Modes:

– ANY-OUT™ Version (User-Programmable

Output via PCB Layout):

– No External Resistor Required

– Output Voltage Range: 0.8 V to 3.95 V

– Adjustable Version:

– Output Voltage Range: 0.8 V to 5.0 V field•

1.0% Accuracy Over Line, Load, and Temperature

• Stable with a 22-μF Output Ceramic Capacitor noise•

Programmable Soft-Start Output

• Power-Good (PG) Output

• Available Packages:

– 5-mm × 5-mm VQFN-20

– 3.5-mm × 3.5-mm VQFN-20

2 Applications

• RF, IF Components: VCO, ADC, DAC, LVDS

• Wireless Infrastructure: SerDes, FPGA, DSP™

• Test and Measurement

• Instrumentation, Medical, and Audio

3 Description

The TPS7A8300 is a low-noise (6 μVRMS), low-

dropout voltage regulator (LDO) capable of sourcing

a 2-A load with only 125 mV of maximum dropout.

The TPS7A8300 output voltages are fully user-

adjustable (up to 3.95 V) using a printed circuit board

(PCB) layout without the need of external resistors,

thus reducing overall component count. For higher

output voltage applications, the device achieves output voltages up to 5 V with the use of external

resistors. The device supports very low input voltages

(down to 1.1 V) with the use of an additional BIAS

rail.

With very high accuracy (1% over line, load, and

temperature), remote sensing, and soft-start

capabilities to reduce inrush current, the TPS7A8300

is ideal for powering high-current, low-voltage devices

such as high-end microprocessors and field•

programmable gate arrays (FPGAs).

The TPS7A8300 is designed to power-up noise•

sensitive components in high-speed communication

applications. The very low-noise, 6-μVRMS device output and high broad-bandwidth PSRR (40 dB at

1 MHz) minimizes phase noise and clock jitter in

high-frequency signals. These features maximize

performance of clocking devices, analog-to-digital converters (ADCs), and digital-to-analog converters

(DACs).

For applications where positive and negative low- noise rails are required, consider TI's TPS7A33 family

of negative high-voltage, ultralow-noise linear

regulators.