Overview
The ATL432LIBQDBZRQ1, produced by Texas Instruments, is a high bandwidth, low-IQ programmable shunt regulator. This device is part of the ATL43xLI-Q1 series, which includes the ATL431LI-Q1 and ATL432LI-Q1, differing mainly in their pinout configurations. The ATL432LIBQDBZRQ1 is designed for automotive, commercial, and military applications, offering high thermal stability over a wide temperature range of –40°C to +125°C. It is AEC-Q100 qualified, ensuring reliability in harsh environments.
This regulator is a three-terminal adjustable shunt regulator, allowing the output voltage to be set between 2.5 V and 36 V using two external resistors. It features a typical output impedance of 0.3 Ω and a sharp turn-on characteristic, making it an excellent replacement for Zener diodes in various applications.
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 Range | Vref to 36 | V |
| Operating Temperature Range | –40°C to +125°C | °C |
| Maximum Temperature Drift | 27 mV | 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 (II(dev)) | 0.3 μA (max) | μA |
| Package Type | SOT-23 (3-pin) | |
| Body Size | 2.90 mm x 1.30 mm | mm |
Key Features
- AEC-Q100 Qualified: Ensures reliability in automotive applications with a temperature grade of –40°C to +125°C.
- Adjustable Output Voltage: Can be set between 2.5 V and 36 V using external resistors.
- Low Output Impedance: Typical output impedance of 0.3 Ω.
- High Thermal Stability: Low output drift versus temperature, ensuring good stability over the entire temperature range.
- Low Minimum Operating Current: Typical minimum cathode current (Imin) of 65 µA, helping reduce system power consumption.
- Internal Compensation: Stable without an output capacitor between the cathode and anode.
- Sharp Turn-On Characteristic: Makes it an excellent replacement for Zener diodes in many applications.
Applications
- Inverter and Motor Control: Used in power management for inverter and motor control systems.
- DC/DC Converter: Employed in DC/DC converter designs for voltage regulation.
- LED Lighting: Utilized in LED lighting systems for stable voltage supply.
- On-Board Charger (OBC): Used in on-board chargers for electric vehicles.
- Infotainment and Cluster: Applied in automotive infotainment and cluster systems.
Q & A
- What is the operating temperature range of the ATL432LIBQDBZRQ1?
The operating temperature range is –40°C to +125°C.
- What is the typical output impedance of the ATL432LIBQDBZRQ1?
The typical output impedance is 0.3 Ω.
- How is the output voltage of the ATL432LIBQDBZRQ1 adjusted?
The output voltage can be adjusted between 2.5 V and 36 V using two external resistors.
- What is the minimum cathode current required for the ATL432LIBQDBZRQ1 to operate properly?
The minimum cathode current (Imin) is typically 65 µA.
- Is the ATL432LIBQDBZRQ1 internally compensated?
Yes, it is internally compensated and stable without an output capacitor between the cathode and anode.
- What are the common applications of the ATL432LIBQDBZRQ1?
Common applications include inverter and motor control, DC/DC converters, LED lighting, on-board chargers, and infotainment systems.
- What is the reference voltage tolerance at 25°C for the ATL432LIBQDBZRQ1?
The reference voltage tolerance at 25°C is 0.5% (B grade) and 1% (A grade).
- How does the ATL432LIBQDBZRQ1 differ from the ATL431LI-Q1?
The ATL432LIBQDBZRQ1 has a different pinout configuration compared to the ATL431LI-Q1, but they have the same functionality and electrical specifications.
- What is the maximum temperature drift of the ATL432LIBQDBZRQ1?
The maximum temperature drift is 27 mV.
- What is the typical reference input current (IREF) of the ATL432LIBQDBZRQ1?
The typical reference input current (IREF) is 0.4 μA (max).
