LP5912-1.2DRVT集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LP5912-1.2DRVT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LP5912-1.2DRVT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• Input Voltage Range: 1.6 V to 6.5 V

• Output Voltage Range: 0.8 V to 5.5 V

• Output Current up to 500 mA

• Low Output-Voltage Noise: 12 μVRMS Typical

• PSRR at 1 kHz: 75 dB Typical

• Output Voltage Tolerance (VOUT ≥ 3.3 V): ±2%

• Low IQ (Enabled, No Load): 30 μA Typical

• Low Dropout (VOUT ≥ 3.3 V): 95 mV Typical at

500-mA Load

• Stable With 1-μF Ceramic Input and Output

Capacitors

• Thermal-Overload and Short-Circuit Protection

• Reverse Current Protection

• No Noise Bypass Capacitor Required

• Output Automatic Discharge for Fast Turnoff

• Power-Good Output With 140-μs Typical Delay

• Internal Soft-Start to Limit the In-rush Current

• –40°C to +125°C Operating Junction Temperature

Range

2 Applications

• Camera Modules

• Sensors

• HiFi Audio Radio Transceivers

• PLL/Synthesizer, Clocking

• Medium-Current, Noise-Sensitive Applications

3 Description

The LP5912 is low-noise LDO that can supply up to

500 mA of output current. Designed to meet the

requirements of RF and analog circuits, the LP5912

device provides low noise, high PSRR, low quiescent

current, and low line and load transient response.

The LP5912 offers class-leading noise performance

without a noise bypass capacitor and with the ability

for remote output capacitance placement.

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

a 1-μF output ceramic capacitor (no separate noise

bypass capacitor required).

This device is available with fixed output voltages

from 0.8 V to 5.5 V in 25-mV steps. Contact Texas

Instruments Sales for specific voltage option needs.