Features
| | 2.0% output accuracy (25°C) |
| | Low dropout voltage: 250 mV @ 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 |
| | T0-252, SOT-223 and 6-Lead LLP packages |
| | Enable pin (LP38693) |
General Description
The LP38691/3 low dropout CMOS linear regulators provide tight output tolerance (2.0% typical), extremely low dropout voltage
(250 mV @ 500mA load current, VOUT = 5V), and excellent AC performance utilizing ultra low ESR ceramic output capacitors.
The low thermal resistance of the LLP, SOT-223 and TO-252 packages allow the full operating current to be used even in high
ambient temperature environments.
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. More...
Applications
| | Hard Disk Drives |
| | Notebook Computers |
| | Battery Powered Devices |
| | Portable Instrumentation |
| |
Typical Application
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| Parameters | Values |
| Output Current |
500 mA |
| Output Min |
1.8, 2.5, 3.3, 5 Volt |
| Input Min Voltage |
2.93, 2.7, 3.73, 5.43 Volt |
| Input Max Voltage |
10 Volt |
| Dropout Voltage |
Undefined, 0.25, 0.33, 0.43 Volt |
| Adjustable Output |
No |
| Quiescent Current |
0.055 mA |
| On/Off Pin |
No |
| Error Flag |
No |
| RegType |
LDO |
| Temperature Min |
-40 deg C |
| Temperature Max |
125 deg C |
| Output Voltage |
1.8, 2.5, 3.3, 5 Volt |
| Output Max |
1.8, 2.5, 3.3, 5 Volt |
| PowerWise |
Yes |
Typical Performance
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| |
Also Recommended
Additional Resources
Application Notes

Block Diagram
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LP38691 Block Diagram for LLP
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