Key facts
- Model
- LP38691
- Industry
- Industrial
- Documents
- 4
- Languages
- EN
- Last added
- 2012-07-04
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National Semiconductor LP38691/LP38693 Datasheet
The National Semiconductor LP38691/LP38693 are 500mA low dropout (LDO) CMOS linear regulators designed for applications requiring tight output tolerance and excellent AC performance. These devices utilize ultra-low ESR ceramic output capacitors to ensure stability without the need for external compensation components in many configurations.
Key features include a precision bandgap reference providing 2.0% typical output voltage accuracy, extremely low dropout voltage (250 mV at 500mA), and very low ground pin current (1 pA off-state). The regulators are available in LLP, SOT-223, and TO-252 packages and operate over a wide temperature range of -40°C to +125°C.
National Semiconductor LP38691 specifications
| Output Current | 500mA |
|---|---|
| Dropout Voltage (Typ) | 250 mV @ 500mA |
| Output Accuracy | 2.0% |
| Input Voltage Range | 2.7V to 10V |
| Operating Temperature | -40°C to +125°C |
| Off-state Quiescent Current | 1 pA |
All National Semiconductor LP38691 documents by type
Ratings, dimensions and ordering codes, for selection and design work.
- National Semiconductor LP38691/LP38693 Datasheet 16 p
- National Semiconductor LP38691/LP38693 Datasheet 16 p
- National LP38691/LP38693 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors handbook
- National Semiconductor LP38691/LP38693 500mA Low Dropout CMOS Linear Regulator Datasheet 16 p
Questions answered in these manuals
What is the typical dropout voltage?
The typical dropout voltage is 250 mV at a load current of 500mA with a 5V output.
Which packages are available for these regulators?
The LP38691/LP38693 are available in T0-252, SOT-223, and 6-Lead LLP packages.
What is the quiescent current of these regulators?
The ground pin current remains below 100 µA regardless of load current, input voltage, or operating temperature.
Are these regulators stable with ceramic capacitors?
Yes, they provide excellent AC performance utilizing ultra low ESR ceramic output capacitors.
What is the typical dropout voltage of the LP38691 at 500 mA?
The typical dropout voltage is 250 mV at a 500 mA load.
From: National Semiconductor LP38691/LP38693 500mA Low Dropout CMOS Linear Regulator Datasheet
What input voltage range does the LP38691/LP38693 support?
It operates from 2.7 V up to 10 V.
From: National Semiconductor LP38691/LP38693 500mA Low Dropout CMOS Linear Regulator Datasheet