Overview
The LM4132DMFX-3.0/NOPB, produced by Texas Instruments, is a precision low dropout voltage reference. This device is part of the LM4132 family, which offers high accuracy and stability comparable to the best laser-trimmed bipolar references but in cost-effective CMOS technology. The LM4132 uses EEPROM registers to correct for curvature, temperature coefficient, and accuracy, allowing for package-level programming to overcome assembly shifts. This makes it ideal for applications requiring precise voltage regulation.
The device is available in a compact SOT-23 package, making it suitable for space-critical applications. It can deliver up to 20 mA of output current and does not require an output capacitor or buffer amplifier, which is a significant advantage over other LDO references.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Output Voltage Initial Accuracy (Grade D) | -0.4% | 0% | 0.4% | % |
| Temperature Coefficient (Grade D) | - | - | 20 ppm/°C | ppm/°C |
| Supply Current | - | 60 µA | 100 µA | µA |
| Supply Current in Shutdown | - | 3 µA | 7 µA | µA |
| Line Regulation | - | 85 ppm/V | - | ppm/V |
| Load Regulation | - | 25 ppm/mA | 120 ppm/mA | ppm/mA |
| Long-term Stability (1000 Hrs) | - | 50 ppm | - | ppm |
| Thermal Hysteresis | - | 75 ppm | - | ppm |
| Dropout Voltage (ILOAD = 10 mA) | 175 mV | - | 400 mV | mV |
| Output Noise Voltage (0.1 Hz to 10 Hz) | - | 310 µVPP | - | µVPP |
| Short-circuit Current | - | - | 75 mA | mA |
| Enable Pin Maximum Low Input Level | - | 35% (VIN) | - | % (VIN) |
| Enable Pin Minimum High Input Level | - | 65% (VIN) | - | % (VIN) |
Key Features
- Precision low dropout voltage reference with high accuracy and stability.
- CMOS technology with EEPROM registers for curvature, temperature coefficient, and accuracy correction.
- No output capacitor or buffer amplifier required.
- Delivers up to 20 mA of output current.
- Low quiescent current (60 µA) and low dropout voltage (400 mV).
- Available in five grades (A, B, C, D, E) for different accuracy and temperature coefficient specifications.
- Compact SOT-23 package suitable for space-critical applications.
- Stable with low-ESR ceramic capacitors.
- Custom voltage options available from 1.8 V to 4.096 V.
Applications
- Instrumentation and Process Control
- Test Equipment
- Data Acquisition Systems
- Base Stations
- Servo Systems
- Portable, Battery-Powered Equipment
- Automotive and Industrial
- Precision Regulators
- Battery Chargers
- Communications
- Medical Equipment
Q & A
- What is the output voltage range of the LM4132?
The LM4132 is available with output voltages of 1.8 V, 2.048 V, 2.5 V, 3 V, 3.3 V, and 4.096 V, with custom options between 1.8 V and 4.096 V.
- What is the maximum output current of the LM4132?
The LM4132 can deliver up to 20 mA of output current.
- Does the LM4132 require an output capacitor or buffer amplifier?
No, the LM4132 does not require an output capacitor or buffer amplifier.
- What is the quiescent current of the LM4132?
The quiescent current of the LM4132 is typically 60 µA.
- What are the different grades of the LM4132 and their accuracy specifications?
The LM4132 is available in five grades: A (0.05% accuracy), B (0.1% accuracy), C (0.2% accuracy), D (0.4% accuracy), and E (0.5% accuracy).
- What is the dropout voltage of the LM4132?
The dropout voltage of the LM4132 is typically 400 mV at an output current of 10 mA.
- What is the thermal hysteresis of the LM4132?
The thermal hysteresis of the LM4132 is typically 75 ppm after cycling the device from -40°C to 125°C.
- What are the typical applications of the LM4132?
The LM4132 is used in instrumentation and process control, test equipment, data acquisition systems, base stations, servo systems, portable battery-powered equipment, automotive and industrial applications, precision regulators, battery chargers, communications, and medical equipment.
- What package type is the LM4132 available in?
The LM4132 is available in a SOT-23 package.
- How does the LM4132 achieve its high accuracy and stability?
The LM4132 achieves its high accuracy and stability through the use of EEPROM registers for correcting curvature, temperature coefficient, and accuracy on a CMOS band-gap architecture.
