Overview
The TL432LI-Q1 is a three-terminal adjustable shunt regulator produced by Texas Instruments. It is designed to offer specified thermal stability over a wide range of temperature conditions, making it suitable for automotive, commercial, and military applications. This device is a pin-to-pin alternative to the industry standard TL431-Q1, with optimized reference current and deviation performance. The TL432LI-Q1 has the same functionality and electrical specifications as the TL431LI-Q1 but features a different pinout for the SOT-23 (DBZ) package.
Key Specifications
| Specification | Value |
|---|---|
| Package | SOT-23 (DBZ), 3 pins |
| Operating Temperature Range | –40°C to 125°C (Grade 1), –40°C to 150°C (Grade 0) |
| Reference Voltage | Approximately 2.495 V |
| Adjustable Output Voltage | 2.495 V to 36 V |
| Reference Voltage Tolerance at 25°C | 0.5% (B grade), 1% (A grade) |
| Maximum Temperature Drift | 27 mV (Grade 1), 34 mV (Grade 0) |
| Typical Output Impedance | 0.3 Ω |
| Sink-Current Capability | 0.6 mA (min), 15 mA (max) |
| Reference Input Current | 0.4 µA (max) |
| Deviation of Reference Input Current over Temperature | 0.3 µA (max) |
Key Features
- Qualified for automotive applications and AEC-Q100 certified.
- Adjustable output voltage from 2.495 V to 36 V using two external resistors.
- Low output impedance of 0.3 Ω.
- Sink-current capability up to 15 mA.
- Low reference input current and deviation over temperature.
- Sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Internally compensated for stability without an output capacitor.
Applications
- Onboard regulation.
- Adjustable power supplies.
- Switching power supplies.
- Voltage clamping and error amplification.
- Industrial, automotive, telecom, and computing equipment.
Q & A
- What is the TL432LI-Q1? The TL432LI-Q1 is a three-terminal adjustable shunt regulator produced by Texas Instruments.
- What are the operating temperature ranges for the TL432LI-Q1? The device operates from –40°C to 125°C for Grade 1 and –40°C to 150°C for Grade 0.
- What is the adjustable output voltage range of the TL432LI-Q1? The output voltage can be set between 2.495 V and 36 V using two external resistors.
- What are the reference voltage tolerances for the TL432LI-Q1? The reference voltage tolerances are 0.5% (B grade) and 1% (A grade) at 25°C.
- What is the typical output impedance of the TL432LI-Q1? The typical output impedance is 0.3 Ω.
- What is the sink-current capability of the TL432LI-Q1? The sink-current capability ranges from 0.6 mA (min) to 15 mA (max).
- Is the TL432LI-Q1 internally compensated for stability? Yes, the device is internally compensated for stability without the need for an output capacitor.
- What are some common applications of the TL432LI-Q1? Common applications include onboard regulation, adjustable power supplies, switching power supplies, and voltage clamping.
- Is the TL432LI-Q1 AEC-Q100 certified? Yes, the TL432LI-Q1 is AEC-Q100 certified, making it suitable for automotive applications.
- How does the TL432LI-Q1 differ from the TL431LI-Q1? The TL432LI-Q1 has the same functionality and electrical specifications as the TL431LI-Q1 but features a different pinout for the SOT-23 (DBZ) package.
