Overview
The LT1964ES5-SD#TRPBF, produced by Analog Devices Inc., is a micropower low noise, low dropout negative regulator. This device is designed to supply up to 200mA of output current and features a low dropout voltage, making it suitable for a variety of applications, especially in battery-powered systems and noise-sensitive instrumentation.
The LT1964 is available in several package options, including the 5-lead Plastic SOT-23 package, and operates over a temperature range of –40°C to 125°C. It offers adjustable output voltage from –1.22V to –20V and a fixed output voltage of –5V, providing flexibility in different design scenarios.
Key Specifications
| Parameter | Value | Units |
|---|---|---|
| Output Current | 200 | mA |
| Fixed Output Voltage | –5 | V |
| Adjustable Output Voltage Range | –1.22 to –20 | V |
| Dropout Voltage | Typical: 350mV @ ILOAD = –200mA | mV |
| Quiescent Current | 30μA (active), 3μA (shutdown) | μA |
| Output Voltage Noise (10Hz to 100kHz) | 30 μVRMS | μVRMS |
| Operating Junction Temperature Range | –40°C to 125°C | °C |
| Shutdown Threshold | Positive or Negative Logic | |
| Package Type | 5-Lead Plastic SOT-23 |
Key Features
- Low noise operation with 30 μVRMS output voltage noise from 10Hz to 100kHz.
- Low dropout voltage, ensuring efficient power supply.
- Adjustable output voltage from –1.22V to –20V and a fixed output voltage of –5V.
- Low quiescent current of 30μA in active mode and 3μA in shutdown mode.
- Positive or negative shutdown logic for flexible control.
- Thermal limiting and short-circuit protection for enhanced reliability.
- Stable operation with 1μF output capacitor and compatible with aluminum, tantalum, or ceramic capacitors.
- Compact package options including ThinSOT™ and 8-Pin 3mm × 3mm DFN packages.
Applications
- Battery-powered instruments and systems where low power consumption is critical.
- Noise-sensitive instrumentation requiring low noise power supply.
- Dual supply applications where the regulator load is returned to a positive supply.
- Low profile and space-constrained designs due to its compact packaging.
Q & A
- What is the maximum output current of the LT1964?
The LT1964 can supply up to 200mA of output current.
- What are the available output voltage options for the LT1964?
The LT1964 offers a fixed output voltage of –5V and an adjustable output voltage range from –1.22V to –20V.
- What is the quiescent current of the LT1964 in active and shutdown modes?
The quiescent current is 30μA in active mode and 3μA in shutdown mode.
- What is the typical dropout voltage of the LT1964?
The typical dropout voltage is around 350mV at an output current of –200mA.
- What type of shutdown logic does the LT1964 support?
The LT1964 supports both positive and negative shutdown logic.
- What is the operating junction temperature range of the LT1964?
The operating junction temperature range is –40°C to 125°C.
- Is the LT1964 stable with different types of output capacitors?
Yes, the LT1964 is stable with aluminum, tantalum, or ceramic capacitors.
- What are some common applications of the LT1964?
Common applications include battery-powered instruments, noise-sensitive instrumentation, and dual supply applications.
- What are the package options available for the LT1964?
The LT1964 is available in 5-lead Plastic SOT-23 and 8-Pin 3mm × 3mm DFN packages.
- Does the LT1964 have any built-in protection features?
Yes, the LT1964 includes thermal limiting and short-circuit protection.
