Overview
The LT1965EMS8E-2.5#PBF is a low noise, low dropout linear regulator from 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 various fixed output voltages, including 1.5V, 1.8V, 2.5V, and 3.3V, as well as an adjustable version. It is particularly suited for sensitive RF and DSP supply applications due to its very low output noise.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Output Current | 1.1 | A |
| Typical Dropout Voltage | 310 | mV |
| Maximum Input Voltage | 20 | V |
| Minimum Input Voltage | 1.8 | V |
| Maximum Operating Temperature | 125 | °C |
| 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 |
| ADJ Pin Voltage | ±9 | V |
| SHDN Pin Voltage | ±22 | V |
| Package Type | 8-Lead Plastic MSOP or DFN |
Key Features
- Low noise and low dropout voltage, making it ideal for sensitive RF and DSP supply applications.
- Output current of 1.1A with a typical dropout voltage of 310mV.
- Available in fixed output voltages (1.5V, 1.8V, 2.5V, 3.3V) and an adjustable version with a 1.20V reference.
- Stable with output capacitors as low as 10µF.
- Internal protection circuitry includes reverse-battery protection, current limiting with foldback, thermal limiting, and reverse-current protection.
- Low quiescent current that does not rise in dropout.
- Shutdown mode reduces quiescent current to less than 1µA.
Applications
- Sensitive RF and DSP supply applications.
- General-purpose power supply for low-voltage systems.
- Post-regulation for switching supplies.
- Battery-powered devices requiring low noise and high efficiency.
- Communication equipment and data acquisition systems.
Q & A
- What is the typical dropout voltage of the LT1965EMS8E-2.5#PBF?
The typical dropout voltage is 310mV.
- What is the maximum output current of the LT1965EMS8E-2.5#PBF?
The maximum output current is 1.1A.
- What are the available output voltages for the LT1965 series?
The available fixed output voltages are 1.5V, 1.8V, 2.5V, and 3.3V, as well as an adjustable version.
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is less than 1µA.
- What kind of internal protection does the LT1965EMS8E-2.5#PBF have?
The device includes reverse-battery protection, current limiting with foldback, thermal limiting, and reverse-current protection.
- What is the maximum operating temperature of the LT1965EMS8E-2.5#PBF?
The maximum operating temperature is 125°C.
- What is the minimum input voltage required for the LT1965EMS8E-2.5#PBF?
The minimum input voltage is 1.8V.
- What is the output voltage noise of the LT1965EMS8E-2.5#PBF?
The output voltage noise is 40µVRMS (COUT = 10µF, ILOAD = 1.1A, BW = 10Hz to 100kHz).
- What package types are available for the LT1965 series?
The device is available in 8-Lead Plastic MSOP or DFN packages.
- Why is the LT1965EMS8E-2.5#PBF suitable for sensitive RF and DSP applications?
It is suitable due to its very low output noise and low dropout voltage.
