National Semiconductor Added the Adjustable Output Version to LP38691 Family of LDO Linear Regulators.
Features
- Output voltage range of 1.25V - 9V
- 2.0% adjust pin voltage accuracy (25°C)
- Low dropout voltage: 250mV @ 500mA (typ, 5V out)
- Wide input voltage range (2.7V to 10V)
- Precision (trimmed) bandgap reference
- Guaranteed specs for –40°C to +125°C
- 1µA off-state quiescent current
- Thermal overload protection
- Foldback current limiting
- SOT-223 and 6-Lead LLP packages
- Enable pin (LP38693-ADJ)
Description
The LP38691/3-ADJ low dropout CMOS linear regulators provide 2.0% precision reference voltage, extremely low dropout voltage (250mV @ 500mA load current, VOUT = 5V) and excellent AC performance utilizing ultra low ESR ceramic output capacitors.
The low thermal resistance of the LLP and SOT-223 packages allow the full operating current to be used even in high ambient temperature environments.
| SOT-223 | LLP |
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The use of a PMOS power transistor means that no DC base drive current is required to bias it allowing ground pin current to remain below 100 µA regardless of load current, input voltage, or operating temperature.
- Dropout Voltage: 250 mV (typ) @ 500mA (typ. 5V out).
- Ground Pin Current: 55 µA (typ) at full load.
- Adjust Pin Voltage: 2.0% (25°C) accuracy.
Applications
- Hard Disk Drives
- Notebook Computers
- Battery Powered Devices
- Portable Instrumentation
