LP5910-1.8YKAR集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LP5910-1.8YKAR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LP5910-1.8YKAR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

• Input voltage range: 1.3 V to 3.3 V

• Output voltage range: 0.8 V to 2.3 V

• Output current: 300 mA

• PSRR: 75 dB at 1 kHz

• Output voltage tolerance: ±2%

• Low dropout: 120 mV (typical)

• Very low IQ (enabled, no load): 12 μA

• Low output-voltage noise: 12 μVRMS

• Stable with ceramic input and output capacitors

• Thermal overload protection

• Short-circuit protection

• Reverse current protection

• Automatic output discharge for fast turnoff

2 Applications

• Mobile phones and tablets

• Digital cameras and audio devices

• Portable and battery-powered equipment

• Portable medical equipment

• Virtual reality

• RF, PLL, VCO, and clock power supplies

• IP cameras

3 Description

The LP5910 is a low-noise LDO that can supply

up to 300 mA of output current. Designed to meet

the requirements of RF and analog circuits, this

device provides low noise, high PSRR, low quiescent

current, and superior line transient and load transient

response. Using new innovative design techniques

the LP5910 offers class-leading noise performance

without a noise bypass capacitor and with the option

for remote output capacitor placement.

The device contains a reverse current protection

circuit that prevents a reverse current flow through the

LDO to the IN pin when the input voltage is lower than

the output voltage.

When the Enable (EN) pin is low, and the output is

in an OFF state, an automatic output discharge circuit

discharges the output capacitance for fast turnoff.

With its low input and low output voltage range the

LP5910 is well-suited as a post DC-DC regulator

(post BUCK regulator) or for single- or dual-cell

applications.

The device is designed to work with a 1-μF input and

a 1-μF output ceramic capacitor. A separate noise

bypass capacitor is not required.

This device is available with fixed output voltages

from 0.8 V to 2.3 V in 25-mV steps. Contact Texas

Instruments Sales for specific voltage option needs.