Overview
The ATL432LIBQDBZR, produced by Texas Instruments, is a high-bandwidth, low-IQ programmable shunt regulator. This device is part of the ATL43xLI series, which includes the ATL431LI and ATL432LI, offering similar functionality but with different pinouts. The ATL432LIBQDBZR is designed for applications requiring precise voltage regulation and low power consumption. It operates over a wide temperature range from –40°C to +125°C, making it suitable for automotive, commercial, and military environments. The device features an internal reference and amplifier, enabling it to act as a shunt regulator, error amplifier, or comparator with an integrated reference.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Reference Voltage Tolerance at 25°C | 0.5% (B Grade), 1% (A Grade) | % |
| Minimum Typical Output Voltage | 2.5 | V |
| Adjustable Output Voltage | Vref to 36 | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Maximum Temperature Drift | 17 mV (I Temp), 27 mV (Q Temp) | mV |
| Typical Output Impedance | 0.3 | Ω |
| Sink-Current Capability | Imin = 0.08 mA (max), IKA = 15 mA (max) | mA |
| Reference Input Current IREF | 0.4 μA (max) | μA |
| Deviation of Reference Input Current over Temperature | 0.3 μA (max) | μA |
| Packages | 1-mm x 1-mm X2SON or SOT23-3 |
Key Features
- High Bandwidth and Low IQ: The ATL432LIBQDBZR offers high bandwidth and low quiescent current, making it ideal for applications where power efficiency is crucial.
- Adjustable Output Voltage: The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V using two external resistors.
- Thermal Stability: The device operates over a wide temperature range from –40°C to +125°C, ensuring good stability over the entire temperature range.
- Low Output Impedance: With a typical output impedance of 0.3 Ω, the device provides a sharp turn-on characteristic, making it an excellent replacement for Zener diodes.
- Compact Packaging: Available in 1-mm x 1-mm X2SON or SOT23-3 packages, making it suitable for space-constrained applications.
- Pin-to-Pin Alternative: The ATL432LIBQDBZR is a pin-to-pin alternative to the TL431LI and TL432LI, with lower minimum operating current to reduce system power consumption.
Applications
- Adjustable Voltage and Current Referencing: Ideal for applications requiring precise voltage or current regulation.
- Secondary Side Regulation in Flyback SMPS: Used in switching power supplies for efficient voltage regulation.
- Zener Diode Replacement: Offers a more stable and efficient alternative to traditional Zener diodes.
- Voltage Monitoring: Can be used to monitor and regulate voltage levels in various systems.
- Precision Constant Current Sink/Source: Suitable for applications requiring stable current sourcing or sinking.
- Comparator with Integrated Reference: Can be used as a comparator with an integrated reference voltage.
Q & A
- What is the operating temperature range of the ATL432LIBQDBZR?
The ATL432LIBQDBZR operates from –40°C to +125°C.
- What are the typical output voltage ranges for the ATL432LIBQDBZR?
The output voltage can be set to any value between Vref (approximately 2.5 V) and 36 V.
- What are the package options available for the ATL432LIBQDBZR?
The device is available in 1-mm x 1-mm X2SON or SOT23-3 packages.
- What is the typical output impedance of the ATL432LIBQDBZR?
The typical output impedance is 0.3 Ω.
- What is the maximum sink-current capability of the ATL432LIBQDBZR?
The maximum sink-current capability is 15 mA.
- Can the ATL432LIBQDBZR replace Zener diodes in some applications?
Yes, it can replace Zener diodes due to its sharp turn-on characteristic and stable output voltage.
- What is the reference voltage tolerance at 25°C for the ATL432LIBQDBZR?
The reference voltage tolerance at 25°C is 0.5% (B Grade) and 1% (A Grade).
- How does the ATL432LIBQDBZR compare to the TL431LI and TL432LI?
The ATL432LIBQDBZR is a pin-to-pin alternative with lower minimum operating current to reduce system power consumption.
- What are some common applications of the ATL432LIBQDBZR?
Common applications include adjustable voltage and current referencing, secondary side regulation in Flyback SMPS, Zener diode replacement, voltage monitoring, and precision constant current sink/source.
- What is the maximum reference input current for the ATL432LIBQDBZR?
The maximum reference input current is 0.4 μA.
