Overview
The LP38692-ADJ, produced by Texas Instruments, is a 1-A low dropout (LDO) CMOS linear regulator with adjustable output voltage. This device is designed to meet the requirements of portable, battery-powered digital systems, providing an accurate output voltage with fast start-up. It features a 2.5% precision reference voltage and extremely low dropout voltage, making it suitable for a variety of applications where power efficiency and stability are crucial.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Voltage Range | 2.7 to 10 | V |
| Output Voltage Range | 1.25 to 9 | V |
| Adjust Pin Voltage Accuracy (25°C) | 2.5% | |
| Dropout Voltage (typical) at 1 A, VOUT = 5 V | 450 mV | |
| Ground Pin Current (typical) at full load | 55 µA | |
| Quiescent Current | 1 µA (off-state) | |
| Thermal Shutdown Activation | 160°C | |
| Package Options | 5-Pin SOT-223, 6-Pin WSON | |
| Operating Temperature Range | -40°C to +125°C |
Key Features
- Low dropout voltage: 450 mV at 1 A (typical 5-V output)
- 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 (EN) pin for on/off control (LP38692-ADJ only)
- Stable with ceramic output capacitors
- Low ground pin current: below 100 µA regardless of load current, input voltage, or operating temperature
Applications
- Hard Disk Drives
- Notebook Computers
- Battery-Powered Devices
- Portable Instrumentation
Q & A
- What is the input voltage range of the LP38692-ADJ?
The input voltage range is from 2.7 V to 10 V.
- What is the output voltage range of the LP38692-ADJ?
The output voltage range is from 1.25 V to 9 V.
- What is the typical dropout voltage at 1 A load current for the LP38692-ADJ?
The typical dropout voltage at 1 A load current is 450 mV when VOUT is 5 V.
- Does the LP38692-ADJ have an enable pin?
- What is the quiescent current of the LP38692-ADJ in the off-state?
The quiescent current in the off-state is 1 µA.
- What type of output capacitors are recommended for the LP38692-ADJ?
Ceramic capacitors with ultralow ESR are recommended.
- What is the thermal shutdown activation temperature for the LP38692-ADJ?
The thermal shutdown activation temperature is 160°C.
- What are the package options available for the LP38692-ADJ?
The device is available in 5-Pin SOT-223 and 6-Pin WSON packages.
- What is the operating temperature range for the LP38692-ADJ?
The operating temperature range is from -40°C to +125°C.
- How does the foldback current limiting work in the LP38692-ADJ?
Foldback current limiting reduces the output current as the output voltage is reduced, with specific limits based on the differential voltage between VIN and VOUT.
