Overview
The ATL432LIBIDBZR is a high-bandwidth, low-Iq programmable shunt regulator produced by Texas Instruments. This device is part of the ATL43xLI series, which includes the ATL431LI and ATL432LI, with the ATL432LI having a different pinout for the DBZ package. The ATL432LIBIDBZR is a three-terminal adjustable shunt regulator known for its thermal stability across automotive, commercial, and military temperature ranges. It features an adjustable output voltage that can be set between 2.5 V and 36 V using two external resistors. This device is particularly useful for applications requiring precise voltage regulation and low power consumption.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage Tolerance at 25°C | - | - | 0.5% (B Grade), 1% (A Grade) | % |
| Minimum Typical Output Voltage | - | 2.5 | - | V |
| Adjustable Output Voltage Range | 2.5 | - | 36 | V |
| Operating Temperature Range | -40 | - | 125 | °C |
| Maximum Temperature Drift | - | - | 17 mV (I Temp), 27 mV (Q Temp) | mV |
| Typical Output Impedance | - | 0.3 | - | Ω |
| Sink-Current Capability | 0.08 mA | - | 15 mA | mA |
| Reference Input Current (IREF) | - | - | 0.4 μA | μA |
| Package Options | - | - | SOT23-3, X2SON (1.00 mm x 1.00 mm) | - |
Key Features
- High-bandwidth and low-Iq operation, making it suitable for power-efficient designs.
- Adjustable output voltage from 2.5 V to 36 V using external resistors.
- Low output impedance of 0.3 Ω.
- Extended cathode current range from 35 µA to 100 mA.
- Internally compensated for stability, requiring no external capacitive load.
- Available in SOT23-3 and X2SON packages, ideal for space-constrained applications.
- Operates over a wide temperature range from -40°C to +125°C.
- Low temperature drift, ensuring good stability over the entire temperature range.
Applications
- Secondary side regulation in Flyback Switch-Mode Power Supplies (SMPS).
- Zener diode replacement due to its sharp turn-on characteristic.
- Adjustable voltage and current referencing.
- Voltage monitoring and precision constant current sink/source.
- Comparator with integrated reference.
- Industrial, computing, consumer, and portable electronics.
- Power management and power isolation applications.
Q & A
- What is the adjustable output voltage range of the ATL432LIBIDBZR?
The output voltage can be adjusted from 2.5 V to 36 V using two external resistors.
- What are the package options available for the ATL432LIBIDBZR?
The device is available in SOT23-3 and X2SON (1.00 mm x 1.00 mm) packages.
- What is the typical output impedance of the ATL432LIBIDBZR?
The typical output impedance is 0.3 Ω.
- What is the operating temperature range of the ATL432LIBIDBZR?
The device operates from -40°C to +125°C.
- What are the reference voltage tolerances at 25°C for the ATL432LIBIDBZR?
The reference voltage tolerances are 0.5% for B Grade and 1% for A Grade.
- Can the ATL432LIBIDBZR be used as a Zener diode replacement?
- What is the sink-current capability of the ATL432LIBIDBZR?
The sink-current capability ranges from 0.08 mA to 15 mA.
- Does the ATL432LIBIDBZR require an external capacitive load for stability?
No, it is internally compensated for stability and does not require an external capacitive load.
- What are some common applications of the ATL432LIBIDBZR?
Common applications include secondary side regulation in Flyback SMPS, adjustable voltage and current referencing, voltage monitoring, and precision constant current sink/source.
- How does the ATL432LIBIDBZR handle temperature drift?
The device has a low temperature drift, ensuring good stability over the entire temperature range.
