• - 交流-直流(AC-DC)控制器和稳压器
• - 直流-直流(DC-DC)控制器、转换器和稳压器
• - 电压和电流管理
• - 通讯IC
• - 驱动器
• - 热管理

• - 时钟及数据分配
• - 标准逻辑

• - 放大器和比较器
• - 模拟开关
• - 数字电位计
• - 接口
• - EMI和RFI滤波器

• - EEPROM存储器
• - 非易失性只读存储器(NVRAM)
• - SRAM存储器

说明

The TLV431 is a low-voltage 3-terminal adjustable voltage reference with specified thermal stability over applicable industrial and commercial temperature ranges. Output voltage can be set to any value between V_REF (1.24 V) and 6 V with two external resistors. These devices operate from a lower voltage (1.24 V) than the widely used TL431 and TL1431 shunt-regulator references.

When used with an optocoupler, the TLV431 is an ideal voltage reference in isolated feedback circuits for 3-V to 3.3-V switching-mode power supplies. These devices have a typical output impedance of 0.25 . Active output circuitry provides a very sharp turn-on characteristic, making them excellent replacements for low-voltage Zener diodes in many applications, including on-board regulation and adjustable power supplies.

特性

• Low-Voltage Operation...V_REF = 1.24 V
• Adjustable Output Voltage, V_O = V_REF to 6 V
• Reference Voltage Tolerances at 25°C
  • 0.5% for TLV431B
  • 1% for TLV431A
  • 1.5% for TLV431
• Typical Temperature Drift
  • 4 mV (0°C to 70°C)
  • 6 mV (–40°C to 85°C)
  • 11 mV (–40°C to 125°C)
• Low Operational Cathode Current ...80 µA Typ
• 0.25- Typical Output Impedance
• Ultra-Small SC-70 Package Offers 40% Smaller Footprint Than SOT-23-3
• See TLVH431 and TLVH432 for
  • Wider V_KA (1.24 V to 18 V) and I_K (80 mA)
  • Additional SOT-89 Package
  • Multiple Pinouts for SOT-23-3 and SOT-89 Packages