Overview
The LP3965EMP-ADJ-NS is a part of the LP3962/LP3965 series of fast ultra low-dropout linear regulators produced by National Semiconductor. These regulators are designed to operate from a +2.5V to +7.0V input supply and offer a wide range of preset output voltage options, as well as an adjustable output option. The LP3965EMP-ADJ-NS is particularly suited for applications requiring high accuracy and stability, such as microprocessor power supplies, DSP power supplies, and other battery-powered applications.
Key Specifications
| Parameter | Typical Value | Minimum Value | Maximum Value | Units |
|---|---|---|---|---|
| Input Supply Voltage | - | 2.5 | 7.0 | V |
| Output Voltage Range (Adjustable) | - | 1.215 | 5.1 | V |
| Output Current (DC) | - | - | 1.5 | A |
| Dropout Voltage at 150mA | 38 | 45 | 55 | mV |
| Dropout Voltage at 1.5A | 380 | 450 | 550 | mV |
| Ground Pin Current at 1.5A Load | 5 | 14 | 15 | mA |
| Quiescent Current in Shutdown Mode | 15 | 25 | 75 | µA |
| Operating Junction Temperature Range | - | -40 | 125 | °C |
| Package Type | - | - | SOT-223, TO-263, TO-220 | - |
Key Features
- Ultra low dropout voltage
- Low ground pin current
- Load regulation of 0.04%
- 15µA quiescent current in shutdown mode
- Guaranteed output current of 1.5A DC
- Available in SOT-223, TO-263, and TO-220 packages
- Output voltage accuracy ±1.5% at room temperature and ±3.0% over all conditions
- Error flag indicates output status (LP3962 model)
- Sense option improves better load regulation (LP3965 model)
- Extremely low output capacitor requirements
- Overtemperature and overcurrent protection
Applications
- Microprocessor power supplies
- GTL, GTL+, BTL, and SSTL bus terminators
- Power supplies for DSPs
- SCSI terminator
- Post regulators
- High efficiency linear regulators
- Battery chargers
- Other battery-powered applications
Q & A
- What is the input voltage range for the LP3965EMP-ADJ-NS?
The input voltage range is from +2.5V to +7.0V.
- What is the maximum output current of the LP3965EMP-ADJ-NS?
The maximum output current is 1.5A DC.
- What are the available output voltage options for the LP3965EMP-ADJ-NS?
The output voltage can be adjusted from 1.215V to 5.1V.
- What is the typical dropout voltage at 1.5A load current?
The typical dropout voltage at 1.5A load current is 380mV.
- What is the quiescent current in shutdown mode?
The quiescent current in shutdown mode is typically 15µA.
- What are the available package types for the LP3965EMP-ADJ-NS?
The available package types are SOT-223, TO-263, and TO-220.
- Does the LP3965EMP-ADJ-NS have overtemperature protection?
- What is the minimum output capacitance required for proper operation?
The minimum output capacitance required is 10µF.
- How does the error flag operate in the LP3962 model?
The error flag produces a logic low signal when the output drops out of regulation due to low input voltage, current limiting, or thermal limiting.
- What is the operating junction temperature range for the LP3965EMP-ADJ-NS?
The operating junction temperature range is from -40°C to +125°C.
