LP38690SD-1.8/NOPB集成电路（IC）的线性+开关稳压器规格书PDF中文资料

LP38690SD-1.8/NOPB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LP38690SD-1.8/NOPB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• Wide Input Voltage Range (2.7 V to 10 V)

• 2.5% Output Accuracy (25°C)

• Low Dropout Voltage: 450 mV at 1 A

(typical, 5 VOUT)

• Precision (Trimmed) Bandgap Reference

• Ensured Specifications for –40°C to 125°C

• 1-μA Off-State Quiescent Current

• Thermal Overload Protection

• Foldback Current Limiting

• 3-Lead TO-252, 5-Lead SOT-223, and 6-Bump

WSON Packages

• Enable Pin (LP38692)

• Ground Pin Current: 55 μA (typical) at Full Load

• Precision Output Voltage: 2.5% (25°C) Accuracy

2 Applications

• Hard Disk Drives

• Notebook Computers

• Battery Powered Devices

• Portable Instrumentation

3 Description

The LP38690 and LP38692 low-dropout CMOS linear

regulators provide tight output tolerance (2.5%

typical), extremely low dropout voltage (450 mV at a

1-A load current, VOUT = 5 V), and excellent AC

performance utilizing ultra low ESR ceramic output

capacitors.

The low thermal resistance of the WSON, SOT-223,

and TO-252 packages allow the full operating current

to be used even in high ambient temperature

environments.

The use of a PMOS power transistor means that no

DC base drive current is required to bias it allowing

ground pin current to remain below 100 μA

regardless of load current, input voltage, or operating

temperature.