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. 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

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Typical Application click for larger image	Block Diagram click for larger image LP38691-ADJ Internal Block Diagram
Typical Performance click for larger image

Datasheet

Title		Size	Date	Other Language
	LP38691-ADJ LP38693-ADJ 500mA Low Dropout CMOS Linear Regulators with Adjustable Output Stable with Ceramic Output Capacitors	389 Kbytes	26-Aug-09

Featured Application Notes

Title		Size	Date	Other Language
	AN-1670: Application Note 1670 LP38513TJ-ADJ Evaluation Board	356 Kbytes	23-Jan-09
	AN-1797: Application Note 1797 TO-263 THIN Package	2716 Kbytes	10-Mar-08	日本語 中文

More Application Notes

Title		Size	Date	Other Language
	AN-1841: Application Note 1841 LMH1982 Evaluation Board User Guide	913 Kbytes	21-May-08	中文

Reliability Metrics

Part Number	Process	EFR Reject	EFR Sample Size	PPM	LTA Rejects	LTA Device Hours	FITS	MTTF (Hours)
LP38691SD-ADJ	ABCD150	0	34175	0	0	4234000	1	1201409060
LP38691SDX-ADJ	ABCD150	0	34175	0	0	4234000	1	1201409060

Note: The Early Failure Rates (EFR) were calculated as point estimate PPM based on rejects and sample size for EFR. The Long Term Failure Rates were calculated at 60% confidence using the Arrhenius equation at 0.7eV activation energy and derating the assumed stress temperature of 150°C to an application temperature of 55°C.

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