LM4431屬于集成電路（IC）的電壓基準(zhǔn)。由美國(guó)德州儀器公司制造生產(chǎn)的LM4431電壓基準(zhǔn)產(chǎn)品屬于基準(zhǔn)電壓源系列，可通過(guò)相對(duì)較不穩(wěn)定的電源提供穩(wěn)定的電勢(shì)，電壓值始終保持恒定，以便在測(cè)量、控制和類(lèi)似應(yīng)用中用作比較的標(biāo)準(zhǔn)。其功能行為可能與用于大功率調(diào)節(jié)的線性穩(wěn)壓器相似，但基準(zhǔn)電壓源器件卻不適合用于此類(lèi)用途。用作比較標(biāo)準(zhǔn)時(shí)，若輸出電流容量或?qū)嶋H負(fù)載電流增大，其性能通常會(huì)降低。

1FEATURES

2? Small Package: SOT-23

? No Output Capacitor Required

? Tolerates Capacitive Loads

? Fixed Reverse Breakdown Voltage of 2.50V

APPLICATIONS

? Portable, Battery-Powered Equipment

? Data Acquisition Systems

? Instrumentation

? Process Control

? Energy Management

? Product Testing

? Power Supplies

KEY SPECIFICATIONS

? Output Voltage Tolerance: 25°C: ±2.0% (Max)

? Low Output Noise (10 Hz to 10 kHz): 35 μVrms

(Typ)

? Wide Operating Current Range: 100 μA to 15

mA

? Commercial Temperature Range: 0 to +70 °C

? Low Temperature Coefficient: 30 ppm/°C (Typ)

DESCRIPTION

Ideal for space critical applications, the LM4431

voltage reference is available in the sub-miniature

(3 mm x 1.3 mm) SOT-23 surface-mount package.

The LM4431's advanced design eliminates the need

for an external stabilizing capacitor while ensuring

stability with any capacitive load, thus making the

LM4431 easy to use. The operating current range is

100 μA to 15 mA.

The LM4431 utilizes fuse and zener-zap reverse

breakdown voltage trim during wafer sort to ensure

that the parts have an accuracy of better than ±2.0%

at 25°C. Bandgap reference temperature drift

curvature correction and low dynamic impedance ensure stable reverse breakdown voltage accuracy

over a wide range of operating temperatures and

currents.