TLV431B-Q1

汽车类低压可调节精密并联稳压器

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 VREF 1.24 V and 6 V with two external resistors see Figure 2. 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.

.

Qualified for Automotive Applications

.

Low-Voltage Operation: VREF = 1.24 V

.

Adjustable Output Voltage, VO = VREF to 6 V

.

Reference Voltage Tolerances at 25°C

.

0.5% for TLV431B

.

1% for TLV431A

.

Typical Temperature Drift: 11 mV

.

Low Operational Cathode Current :80 µA Typ

.

0.25- Typical Output Impedance

.

See TLVH431 and TLVH432 for

.

Wider VKA 1.24 V to 18 V and IK 80 mA

.

Additional SOT-89 Package

.

Multiple Pinouts for SOT-23-3 and SOT-89 Packages