Overview
The LP38690DTX-3.3/NOPB is a 1-A low-dropout CMOS linear regulator produced by Texas Instruments. This device is designed to provide a stable and accurate output voltage, making it suitable for various portable and battery-powered digital systems. It features a tight output tolerance of 2.5% at 25°C and an extremely low dropout voltage of 450 mV at a 1-A load current. The regulator is available in several packages, including TO-252, SOT-223, and WSON, each optimized for high ambient temperature environments.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | - | 10 | V |
| Output Voltage Accuracy (25°C) | - | 2.5% | - | % |
| Dropout Voltage (typical, 5 VOUT, 1 A) | - | 450 mV | - | mV |
| Quiescent Current (full load) | - | 55 µA | - | µA |
| Operating Temperature Range | -40 | - | 125 | °C |
| Output Current | - | - | 1 A | A |
| Enable Pin Voltage (LP38692 only) | 0.4 | - | 4 | V |
Key Features
- Wide input voltage range from 2.7 V to 10 V
- 2.5% output accuracy at 25°C
- Low dropout voltage: 450 mV at 1 A (typical, 5 VOUT)
- Precision (trimmed) bandgap reference
- Ensured specifications for –40°C to 125°C operating temperature range
- 1-µA off-state quiescent current
- Thermal overload protection and foldback current limiting
- Available in 3-lead TO-252, 5-lead SOT-223, and 6-bump WSON packages
- Enable pin (LP38692 only) for external control of the regulator output
Applications
- Hard Disk Drives
- Notebook Computers
- Battery Powered Devices
- Portable Instrumentation
Q & A
- What is the input voltage range of the LP38690DTX-3.3/NOPB?
The input voltage range is from 2.7 V to 10 V.
- What is the typical dropout voltage at 1 A load current for the LP38690DTX-3.3/NOPB?
The typical dropout voltage is 450 mV at 1 A load current for a 5 V output.
- What is the output voltage accuracy of the LP38690DTX-3.3/NOPB at 25°C?
The output voltage accuracy is 2.5% at 25°C.
- What are the available packages for the LP38690DTX-3.3/NOPB?
The device is available in 3-lead TO-252, 5-lead SOT-223, and 6-bump WSON packages.
- Does the LP38690DTX-3.3/NOPB have an enable pin?
The LP38692 version has an enable pin, but the LP38690 does not.
- What is the quiescent current of the LP38690DTX-3.3/NOPB in the off-state?
The quiescent current in the off-state is 1 µA.
- What protection features does the LP38690DTX-3.3/NOPB have?
The device features thermal overload protection and foldback current limiting.
- What is the recommended output capacitor for the LP38690DTX-3.3/NOPB?
A 1-µF ceramic output capacitor is recommended for stability.
- What are the typical applications of the LP38690DTX-3.3/NOPB?
Typical applications include hard disk drives, notebook computers, battery-powered devices, and portable instrumentation.
- What is the operating temperature range of the LP38690DTX-3.3/NOPB?
The operating temperature range is from –40°C to 125°C.
