Overview
The LT1764AEFE-3.3 is a low dropout regulator (LDO) produced by Linear Technology, now part of Analog Devices. This device is optimized for fast transient response and is capable of supplying up to 3A of output current. It features a low dropout voltage of 340mV at 3A, making it suitable for a wide range of applications requiring stable and efficient voltage regulation.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Output Current | 3 | A |
| Dropout Voltage | 340 | mV at 3A |
| Quiescent Current | 1 | mA |
| Quiescent Current in Shutdown | <1 | µA |
| Input Voltage Range | 2.7 to 20 | V |
| Output Voltage Noise | 40 | µVRMS (10Hz to 100kHz) |
| Fixed Output Voltage | 3.3 | V |
| Adjustable Output Voltage Range | 1.21 to 20 | V |
| Output Capacitor Stability | Stable with 10µF | |
| Package Options | 5-lead TO-220, DD, and 16-lead FE |
Key Features
- Optimized for fast transient response
- Low dropout voltage of 340mV at 3A
- Low output voltage noise of 40µVRMS (10Hz to 100kHz)
- Wide input voltage range from 2.7V to 20V
- No protection diodes needed
- Controlled quiescent current in dropout
- Stable with ceramic and tantalum capacitors
- Reverse battery protection, current limiting, thermal limiting, and no reverse current
Applications
The LT1764AEFE-3.3 is ideal for various applications requiring stable and efficient voltage regulation, including:
- Sensitive RF supply applications due to its low output noise
- Logic power supplies, such as 3.3V to 2.5V logic power supply
- Post-regulators for switching supplies
- General-purpose power supply applications where fast transient response and low dropout voltage are critical
Q & A
- What is the maximum output current of the LT1764AEFE-3.3?
The maximum output current is 3A. - What is the dropout voltage of the LT1764AEFE-3.3 at 3A?
The dropout voltage is 340mV at 3A. - What is the quiescent current of the LT1764AEFE-3.3?
The quiescent current is 1mA, dropping to less than 1µA in shutdown. - What is the input voltage range of the LT1764AEFE-3.3?
The input voltage range is from 2.7V to 20V. - Is the LT1764AEFE-3.3 stable with ceramic capacitors?
Yes, it is stable with ceramic capacitors as well as tantalum and aluminum electrolytic capacitors. - Does the LT1764AEFE-3.3 have built-in protection features?
Yes, it includes reverse battery protection, current limiting, thermal limiting, and no reverse current protection. - What are the available package options for the LT1764AEFE-3.3?
The device is available in 5-lead TO-220, DD, and 16-lead FE packages. - What is the fixed output voltage of the LT1764AEFE-3.3?
The fixed output voltage is 3.3V, but it is also available in adjustable configurations. - Is the LT1764AEFE-3.3 suitable for RF applications?
Yes, it is suitable for sensitive RF supply applications due to its low output voltage noise. - What is the minimum output capacitor required for stability?
The device is stable with output capacitors as low as 10µF.
