LP38691/LP38693 500mA Low Dropout CMOS Linear Regulators Stable with Ceramic Output Capacitors
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.
| 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 |
The typical dropout voltage is 250 mV at a load current of 500mA with a 5V output.
The LP38691/LP38693 are available in T0-252, SOT-223, and 6-Lead LLP packages.
Yes, they provide excellent AC performance utilizing ultra low ESR ceramic output capacitors.