Overview
The TL432IDBZR is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is part of the TL431 and TL432 series, known for their precision and programmability. This device offers specified thermal stability over a wide range of temperatures, making it suitable for various applications including automotive, commercial, and military environments. The TL432IDBZR is packaged in a SOT-23-3 (DBZ) package and has a reverse pinout compared to the TL431.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Reference Voltage (Vref) | 2.440 | 2.495 | 2.550 | mV |
| Cathode Voltage (VKA) | - | - | 37 | V |
| Cathode Current Range (IKA) | -100 | - | 150 | mA |
| Reference Input Current (Iref) | 2 | - | 4 | µA |
| Minimum Cathode Current for Regulation (Imin) | 0.4 | 1 | - | mA |
| Off-State Cathode Current (Ioff) | 0.1 | - | 1 | µA |
| Dynamic Impedance (|zKA|) | 0.2 | - | 0.5 | Ω |
| Operating Junction Temperature Range (TJ) | -40 | - | 125 | °C |
Key Features
- Adjustable output voltage from approximately 2.5 V to 36 V using two external resistors.
- Low output noise and typical output impedance of 0.2 Ω.
- Sink-current capability: 1 mA to 100 mA.
- Low temperature drift, ensuring good stability over the entire temperature range.
- Active output circuitry providing a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
Applications
- Rack server power supplies.
- Industrial AC/DC power supplies.
- AC inverter and VF drives.
- Servo drive control modules.
- Notebook PC power adapter designs.
- On-board regulation, adjustable power supplies, and switching power supplies.
Q & A
- What is the TL432IDBZR? The TL432IDBZR is a three-terminal adjustable shunt regulator produced by Texas Instruments, packaged in a SOT-23-3 (DBZ) package.
- What is the adjustable output voltage range of the TL432IDBZR? The output voltage can be set to any value between approximately 2.5 V and 36 V using two external resistors.
- What are the temperature ranges for the TL432IDBZR? The device is characterized for operation from -40°C to 125°C.
- What is the typical output impedance of the TL432IDBZR? The typical output impedance is 0.2 Ω.
- What are the key applications of the TL432IDBZR? Key applications include rack server power supplies, industrial AC/DC power supplies, AC inverter and VF drives, servo drive control modules, and notebook PC power adapter designs.
- Can the TL432IDBZR replace Zener diodes? Yes, the TL432IDBZR is an excellent replacement for Zener diodes in many applications due to its sharp turn-on characteristic and low output noise.
- What are the different grades of the TL432IDBZR? The device is available in three grades with initial tolerances of 0.5%, 1%, and 2% at 25°C.
- What is the minimum cathode current required for regulation? The minimum cathode current for regulation is 0.4 mA.
- What is the off-state cathode current of the TL432IDBZR? The off-state cathode current is 0.1 µA.
- How does the TL432IDBZR differ from the TL431? The TL432IDBZR has the same functionality and electrical specifications as the TL431 but has a different pinout for the DBZ package.
