Overview
The LT1963AEQ-1.5 is a low dropout (LDO) voltage regulator from Linear Technology, optimized for fast transient response. This regulator is part of the LT1963A series, which is designed to provide high current output with minimal dropout voltage. The LT1963AEQ-1.5 is specifically configured to output a fixed voltage of 1.5V and is suitable for applications requiring low noise and high stability.
The device is capable of supplying up to 1.5A of output current with a dropout voltage of 340mV, making it ideal for power management in various electronic systems. The regulator features a low quiescent current of 1mA, which drops to less than 1µA in shutdown mode, enhancing power efficiency.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Output Current | - | - | 1.5 | - | A |
| Dropout Voltage | ILOAD = 1.5A | 0.34 | 0.45 | - | V |
| Output Voltage | VIN = 2.21V, ILOAD = 1mA | 1.477 | 1.5 | 1.523 | V |
| Quiescent Current | - | - | 1 | - | mA |
| Quiescent Current in Shutdown | VIN = 6V, VSHDN = 0V | - | - | 1 | µA |
| Output Noise (10Hz to 100kHz) | - | - | 40 | - | µVRMS |
| Line Regulation | ∆VIN = 2.21V to 20V, ILOAD = 1mA | 2 | - | 6 | mV |
| Load Regulation | VIN = 2.5V, ∆ILOAD = 1mA to 1.5A | 2 | - | 9 | mV |
| Minimum Input Voltage | ILOAD = 1.5A | 1.9 | - | 2.5 | V |
Key Features
- Optimized for fast transient response
- Output current up to 1.5A
- Low dropout voltage of 340mV
- Low noise: 40µVRMS (10Hz to 100kHz)
- 1mA quiescent current, dropping to <1µA in shutdown
- No protection diodes needed
- Controlled quiescent current in dropout
- Fixed output voltages: 1.5V, 1.8V, 2.5V, 3.3V (for different models)
- Adjustable output from 1.21V to 20V
- Stable with output capacitors as low as 10µF
- Reverse battery protection and no reverse current
- Thermal limiting
- AEC-Q100 qualified for automotive applications
- Available in 5-Lead TO-220, DD, 3-Lead SOT-223, and 8-Lead SO packages
Applications
- Sensitive RF supply applications due to low output noise
- Automotive systems (AEC-Q100 qualified)
- Industrial power supplies requiring high current and low dropout voltage
- Telecommunications equipment
- Medical devices requiring stable and low-noise power supply
- High-performance computing and data storage systems
Q & A
- What is the maximum output current of the LT1963AEQ-1.5?
The maximum output current is 1.5A.
- What is the dropout voltage of the LT1963AEQ-1.5 at full load?
The dropout voltage is 340mV at an output current of 1.5A.
- What is the quiescent current of the LT1963AEQ-1.5 in normal operation and in shutdown?
The quiescent current is 1mA in normal operation and less than 1µA in shutdown.
- What is the output noise of the LT1963AEQ-1.5?
The output noise is 40µVRMS over the frequency range of 10Hz to 100kHz.
- Is the LT1963AEQ-1.5 stable with ceramic capacitors?
- Does the LT1963AEQ-1.5 have built-in protection features?
- What are the available package options for the LT1963AEQ-1.5?
The regulator is available in 5-Lead TO-220, DD, 3-Lead SOT-223, and 8-Lead SO packages.
- Is the LT1963AEQ-1.5 qualified for automotive applications?
- What is the minimum input voltage required for the LT1963AEQ-1.5?
The minimum input voltage is 1.9V for an output current of 1.5A.
- How does the LT1963AEQ-1.5 perform in terms of line and load regulation?
The line regulation is 2-6 mV over the input voltage range, and the load regulation is 2-9 mV over the load current range.
