Overview
The LP38692SDX-5.0/NOPB is a 1-A low-dropout CMOS linear regulator produced by Texas Instruments. This regulator is designed to provide tight output tolerance, extremely low dropout voltage, and excellent AC performance. It is suitable for various applications requiring high precision and reliability, such as hard disk drives, notebook computers, battery-powered devices, and portable instrumentation.
Key Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage Range | 2.7 | - | 10 | V |
| Output Voltage Accuracy (25°C) | - | 2.5% | - | % |
| Dropout Voltage (at 1 A, VOUT = 5 V) | - | 450 mV | - | mV |
| Output Current | - | 1 A | - | A |
| Operating Junction Temperature | -40 | - | 125 | °C |
| Enable Voltage (LP38692 only) | 0.4 | - | 4 | V |
| Enable Pin Leakage | -1 | 0.001 | 1 | µA |
| Thermal Shutdown Temperature | - | 160 | - | °C |
| Package Types | - | TO-252, SOT-223, WSON | - | - |
Key Features
- Wide input voltage range (2.7 V to 10 V)
- Low dropout voltage: 450 mV at 1 A (typical, VOUT = 5 V)
- Precision (trimmed) bandgap reference
- Ensured specifications for –40°C to 125°C
- 1-µA off-state quiescent current
- Thermal overload protection and foldback current limiting
- Enable pin for external control (LP38692 only)
- Ground pin current: 55 µA (typical) at full load
- Stable with ceramic output capacitors
Applications
- Hard disk drives
- Notebook computers
- Battery-powered devices
- Portable instrumentation
Q & A
- What is the input voltage range of the LP38692SDX-5.0/NOPB?
The input voltage range is from 2.7 V to 10 V. - What is the typical dropout voltage of the LP38692SDX-5.0/NOPB at 1 A load current?
The typical dropout voltage is 450 mV at a 1-A load current when VOUT = 5 V. - What is the accuracy of the output voltage at 25°C?
The output voltage accuracy is 2.5% at 25°C. - Does the LP38692SDX-5.0/NOPB have thermal protection?
Yes, it has thermal overload protection that disables the output when the junction temperature rises to approximately 160°C. - What are the package types available for the LP38692SDX-5.0/NOPB?
The available package types are TO-252, SOT-223, and WSON. - How does the enable pin function on the LP38692SDX-5.0/NOPB?
The enable pin allows an external control signal to turn the regulator output on and off. The pin must be terminated either actively or passively. - What is the quiescent current in the off-state?
The off-state quiescent current is 1 µA. - Is the LP38692SDX-5.0/NOPB stable with ceramic output capacitors?
Yes, it is stable with ceramic output capacitors. - What is the typical ground pin current at full load?
The typical ground pin current at full load is 55 µA. - What are some common applications of the LP38692SDX-5.0/NOPB?
Common applications include hard disk drives, notebook computers, battery-powered devices, and portable instrumentation.
