1 Features

1• 0.4% Initial Voltage Tolerance

• 0.2-Ω Typical Output Impedance

• Fast Turnon: 500 ns

• Sink Current Capability: 1 to 100 mA

• Low Reference Current (REF)

• Adjustable Output Voltage: VI(ref) to 36 V

• Supports Defense, Aerospace, and Medical

Applications

– Controlled Baseline

– One Assembly and Test Site

– One Fabrication Site

– Available in Military (–55°C to 125°C)

Temperature Range

– Extended Product Life Cycle

– Extended Product-Change Notification

– Product Traceability

2 Applications

• Shunt Regulators

• Temperature-Compensated Comparators

• PWM Converter Reference

• Photodiode Reference Drivers

• Precision Current Limiters

• Precision Current Sink

3 Description

The TL1431-EP device is a precision-programmable

reference with specified thermal stability over the

military temperature range. The output voltage can be

set to any value from VI(ref) (approximately 2.5 V) to

36 V with two external resistors (see Figure 21). This

device has a typical output impedance of 0.2 Ω.

Active output circuitry provides a very sharp turnon

characteristic, making the device an excellent

replacement for Zener diodes and other types of

references in applications such as onboard

regulation, adjustable power supplies, and switching

power supplies.