LP38512 - 1.5A Fast-Transient Response
Low-Dropout Linear Voltage Regulator

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Overview The LP38512-ADJ is designed for inputs from the 2.5V, 3.3V, and 5.0V rail is stable with 10 µF ceramic capacitors. The LP38512-ADJ has an adjustable output voltage, while the LP38512-1.8 has a fixed 1.8V output. The LP38512-1.8 has an error flag feature that monitors the output voltage and notifies the system processor when the output voltage falls more than 15% below the nominal value. Both provide excellent transient performance to meet the demand of high performance digital core ASICs, DSPs, and FPGAs found in highly-intensive applications such as servers, routers/switches, and base stations.

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LP38512-ADJ Features 2.25V to 5.5V input voltage range Adjustable output voltage range of 0.5V to 4.5V 1.5A output load current ±2.0% accuracy over line, load, and full-temperature range from -40°C to +125°C Stable with tiny 10 µF ceramic capacitors Enable pin Typically less than 1µA of ground pin current in when enable pin is low 25dB of PSRR at 100kHz Over-temperature and over-current protection PSOP-8 and TO263 thin surface mount packages Applications Digital Core ASICs, FPGAs, and DSPs Servers Routers and switches Base stations Storage area networks DDR2 memory

LP38512-1.8 Features 2.25V to 5.5V input voltage range 1.8V fixed output voltage 1.5A output load current ±2.5% accuracy over line, load, and full-temperature range from -40°C to +125°C Stable with tiny 10 µF ceramic capacitors 0.20% output voltage load regulation from 10 mA to 1.5A Enable pin Error flag indicates status of output voltage 1µA of quiescent current in shutdown 40dB of PSRR at 100kHz Over-temperature and over-current protection TO-263 and TO-263 thin surface mount packages Applications Digital core ASICs, FPGAs, and DSPs Servers Routers and switches Base stations Storage area networks DDR2 memory

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LP38512-ADJ Specifications

LP38512-1.8 Specifications

Output current 1500mA Output min 0.5V Input min voltage 2.25V Input max voltage 5.5V Dropout voltage 0.300V Adjustable output Yes Quiescent current 10mA PSRR 73dB Voltage noise (rms) 25µV Ceramic capacitors stable Yes Feedback tolerance 2.0% On/Off pin Yes Error flag No Reg type LDO Temperature min -40°C Temperature max +125°C Output max 4.5V Feedback voltage 0.5V

Output current 1500mA Input min voltage 2.25V Input max voltage 5.50V Dropout voltage 0.300V Adjustable output No Quiescent current 7.5mA PSRR 73dB Voltage noise (rms) 75µV Ceramic capacitors stable Yes On/Off pin Yes Error flag Yes Reg type LDO Temperature min -40°C Temperature max +125°C Output voltage 1.8V

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Adjustable

National Semiconductor Part Number	Digi-Key Part Number	Voltage - Input	Voltage - Output	Package/Case
LP38512MR-ADJ/NOPB	LP38512MR-ADJ-ND	2.25 ~ 5.5V	0.5 ~ 4.5V	PSOP-8
LP38512TJ-ADJ/NOPB	LP38512TJ-ADJCT-ND	2.25 ~ 5.5V	0.5 ~ 4.5V	TO-263 Thin (5 leads + tab)

LP38512TJ-ADJ/NOPB available in Tape & Reel (TR-ND), Cut Tape (CT-ND), and custom Digi-Reel® (DKR-ND)

Fixed

National Semiconductor Part Number	Digi-Key Part Number	Voltage - Input	Voltage - Output	Package/Case
LP38512TS-1.8/NOPB	LP38512TS-1.8-ND	2.25 ~ 5.5V	1.8V	D2Pak, SMD-220, TO-263 (5 leads + tab)
LP38512TJ-1.8/NOPB	LP38512TJ-1.8CT-ND	2.25 ~ 5.5V	1.8V	TO-263 Thin (5 leads + tab)

LP38512TJ-1.8/NOPB available in Tape & Reel (TR-ND), Cut Tape (CT-ND), and custom Digi-Reel® (DKR-ND)