Overview
The TLV431IDBVRE4 is a low-voltage adjustable precision shunt regulator produced by Texas Instruments. It is part of the TLV431 series, which is designed to operate at lower voltages compared to traditional shunt regulators like the TL431. This device features a reference voltage of 1.24V and can be adjusted to output voltages ranging from 1.24V to 6V using two external resistors. The TLV431IDBVRE4 is ideal for applications requiring low-voltage operation and high precision, making it suitable for various industrial, automotive, telecommunications, and computing equipment.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Reference Voltage (VREF) | 1.234 | 1.24 | 1.246 | V |
| Reference Voltage Tolerance at 25°C | - | - | 0.5% (TLV431B) | % |
| Temperature Drift | - | - | 4mV (0°C to 70°C), 6mV (-40°C to 85°C), 11mV (-40°C to 125°C) | mV |
| Operational Cathode Current (IK) | 55 | 80 | 100 | µA |
| Output Impedance (zKA) | 0.25 | - | 0.4 | Ω |
| Off-State Cathode Current (IK(off)) | 0.001 | - | 0.1 | µA |
| Operating Temperature Range | -40°C | - | 125°C | °C |
Key Features
- Low-voltage operation with a reference voltage of 1.24V
- Adjustable output voltage from 1.24V to 6V using two external resistors
- High precision with reference voltage tolerances of 0.5%, 1%, and 1.5% at 25°C
- Low operational cathode current of 80µA typical
- Ultra-small SC-70 package offering a 40% smaller footprint than SOT-23-3
- Active output circuitry providing a sharp turn-on characteristic, ideal for replacing low-voltage Zener diodes
- Internally compensated for stability without an output capacitor
Applications
- Adjustable voltage and current referencing
- Secondary side regulation in flyback switching-mode power supplies (SMPSs)
- Zener replacement
- Voltage monitoring
- Comparator with integrated reference
- Isolated feedback circuits for 3V to 3.3V switching-mode power supplies when used with an optocoupler
Q & A
- What is the reference voltage of the TLV431IDBVRE4?
The reference voltage of the TLV431IDBVRE4 is 1.24V.
- What is the adjustable output voltage range of the TLV431IDBVRE4?
The output voltage can be adjusted from 1.24V to 6V using two external resistors.
- What are the reference voltage tolerances available for the TLV431 series?
The reference voltage tolerances are 0.5%, 1%, and 1.5% at 25°C, denoted by B, A, and blank respectively.
- What is the typical operational cathode current of the TLV431IDBVRE4?
The typical operational cathode current is 80µA.
- What is the output impedance of the TLV431IDBVRE4?
The output impedance is typically 0.25Ω.
- What are some common applications of the TLV431IDBVRE4?
Common applications include adjustable voltage and current referencing, secondary side regulation in flyback SMPSs, Zener replacement, voltage monitoring, and as a comparator with integrated reference.
- Can the TLV431IDBVRE4 be used in isolated feedback circuits?
Yes, it can be used in isolated feedback circuits for 3V to 3.3V switching-mode power supplies when used with an optocoupler.
- What is the operating temperature range of the TLV431IDBVRE4?
The operating temperature range is from -40°C to 125°C.
- Does the TLV431IDBVRE4 require an output capacitor for stability?
No, the TLV431IDBVRE4 is internally compensated and does not require an output capacitor for stability.
- What package options are available for the TLV431 series?
The TLV431 series is available in various packages including SC-70, SOT-23-3, SOT-23-5, SOT-89, and TO-92/TO-226.
