LP3990QTLX-2.8Q1集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LP3990QTLX-2.8Q1属于集成电路（IC）的线性+开关稳压器。由美国德州仪器公司制造生产的LP3990QTLX-2.8Q1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• Qualified for Automotive Applications

• AEC-Q100 Qualified With the Following Results

– Device Temperature Grade 1: –40°C to

+125°C Ambient Operating Temperature

Range

• Input Voltage Range: 2 V to 6 V

• 1% Voltage Accuracy at Room Temperature

• Output Voltage Range: 0.8 V to 3.3 V

• Output Current: 150 mA

• Logic Controlled Enable

• Thermal-Overload and Short-Circuit Protection

• Virtually Zero I Q (Disabled), < 10 nA

• Very Low IQ (Enabled): 43 μA

• Low Output Noise: 150 μVRMS

• PSRR: 55 dB at 1 kHz

• Fast Start-Up: 105 μs

• Stable with Ceramic Capacitor

• Output Stable - Capacitors, 1 μF

• No Noise Bypass Capacitor Required

2 Applications

• Infotainment

• Instrumentation

• Body Electronics

3 Description

The LP3990-Q1 regulator is designed to meet the

requirements of portable, battery-powered systems providing an accurate output voltage, low-noise, and

low-quiescent current. The LP3990-Q1 will provide a

0.8-V output from the low input voltage of 2 V at up to

a 150-mA load current. When switched into shutdown

mode via a logic signal at the enable pin (EN), the

power consumption is reduced to virtually zero.

The LP3990-Q1 is designed to be stable with spacesaving

ceramic capacitors with values as low as 1 μF.

Performance is specified for a –40°C to +125°C junction temperature range.

For output voltage options please refer to package

option addendum (POA) or contact the Texas

Instruments Sales Office.