Overview
The LT1965IDD-3.3#PBF is a low noise, low dropout linear regulator produced by Analog Devices Inc. This device is part of the LT1965 series, which is designed to supply 1.1A of output current with a typical dropout voltage of 310mV. The regulator is available in a fixed output voltage of 3.3V and features a well-controlled quiescent current that does not rise in dropout, making it suitable for a variety of applications requiring stable and low-noise power supply.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 1.1 | A |
| Typical Dropout Voltage | 310 | mV |
| Output Voltage | 3.3 | V |
| Quiescent Current (Adjustable Version) | 500 | µA |
| Quiescent Current in Shutdown | <1 | µA |
| Output Voltage Noise (COUT = 10µF, ILOAD = 1.1A, BW = 10Hz to 100kHz) | 40 | µVRMS |
| Operating Temperature Range | -40°C to 125°C | |
| Package Type | 8-Lead (3mm × 3mm) Plastic DFN | |
| Primary Input Voltage | 20 | V |
Key Features
- Low noise output, making it ideal for sensitive RF and DSP supply applications.
- Low dropout voltage of 310mV typical.
- Well-controlled quiescent current that does not rise in dropout.
- Stable operation with output capacitors as low as 10µF.
- Internal protection circuitry includes reverse-battery protection, current limiting with foldback, thermal limiting, and reverse-current protection.
- Available in fixed output voltages and as an adjustable device with a 1.20V reference.
Applications
- Sensitive RF and DSP supply applications.
- Low-noise power supply requirements in various electronic systems.
- Systems requiring stable and regulated voltage with minimal dropout.
- Applications where low quiescent current is crucial, especially in battery-powered devices.
Q & A
- What is the typical dropout voltage of the LT1965IDD-3.3#PBF?
The typical dropout voltage is 310mV.
- What is the maximum output current of the LT1965IDD-3.3#PBF?
The maximum output current is 1.1A.
- What is the output voltage of the LT1965IDD-3.3#PBF?
The output voltage is fixed at 3.3V.
- What is the quiescent current of the LT1965IDD-3.3#PBF in shutdown mode?
The quiescent current in shutdown mode is less than 1µA.
- What type of protection circuitry does the LT1965IDD-3.3#PBF have?
The device includes reverse-battery protection, current limiting with foldback, thermal limiting, and reverse-current protection.
- What is the minimum output capacitor required for stable operation?
The device is stable with output capacitors as low as 10µF.
- What is the operating temperature range of the LT1965IDD-3.3#PBF?
The operating temperature range is -40°C to 125°C.
- What package type is the LT1965IDD-3.3#PBF available in?
The device is available in an 8-Lead (3mm × 3mm) Plastic DFN package.
- What is the primary input voltage of the LT1965IDD-3.3#PBF?
The primary input voltage is 20V.
- Why is the LT1965IDD-3.3#PBF suitable for RF and DSP applications?
The device is suitable due to its very low output noise, making it ideal for sensitive RF and DSP supply applications.
