LP38842MR-ADJ ,1.5A Ultra Low Dropout Linear RegulatorsPin DescriptionPin Name DescriptionBIAS The bias pin is used to provide the low current bias voltag ..
LP38842S-1.2 ,1.5A Ultra Low Dropout Linear RegulatorsApplicationssuitable for use in powering DSP, Microcontroller Core volt-n ASIC Power Supplies In:ag ..
LP38842SX-1.2 ,1.5A Ultra Low Dropout Linear RegulatorsFeaturesn Ideal for conversion from 1.8V or 1.5V inputsThe LP38842 is a high current, fast response ..
LP38843S-1.2 ,3A Fast-Response Ultra Low Dropout Linear RegulatorsPin DescriptionPin Name DescriptionBIAS The bias pin is used to provide the low current bias voltag ..
LP38843SX-1.5 ,3A Fast-Response Ultra Low Dropout Linear RegulatorsFeaturesn Ideal for conversion from 1.8V or 1.5V inputsThe LP38843 is a high-current, fast-response ..
LP38851MR-ADJ/NOPB ,800 mA Fast-Response High-Accuracy Adjustable LDO Linear Regulator with Enable and Soft-Start 8-SO PowerPAD -40 to 125FEATURES DESCRIPTIONThe LP38851-ADJ is a high current, fast response2• Adjustable V Range of 0.80V ..
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LP38842MR-ADJ-LP38842S-1.2-LP38842SX-1.2
1.5A Ultra Low Dropout Linear Regulators
LP38842
1.5A Ultra Low Dropout Linear Regulators
Stable with Ceramic Output Capacitors
General DescriptionThe LP38842isa high current, fast response regulator
which can maintain output voltage regulation with minimum
inputto output voltage drop. Fabricatedona CMOS process,
the device operates from two input voltages: Vbias provides
voltageto drive the gateof the N-MOS power transistor,
while Vinis the input voltage which supplies powerto the
load. The useofan external bias rail allows the partto
operate from ultra low Vin voltages. Unlike bipolar regula-
tors,the CMOS architecture consumes extremely low quies-
cent currentat any output load current. The useof an
N-MOS power transistor resultsin wide bandwidth,yet mini-
mum external capacitanceis requiredto maintain loop sta-
bility.
The fast transient responseof these devices makes them
suitablefor usein powering DSP, Microcontroller Core volt-
ages and Switch Mode Power Supply post regulators. The
partsare availablein TO-220 and TO-263 packages.
Dropout Voltage: 115 mV (typ)@ 1.5A load current.
Quiescent Current:30 mA (typ)atfull load.
Shutdown Current:30nA (typ) when S/Dpinis low.
Precision Output Voltage: 1.5% room temperature accu-
racy.
Features Idealfor conversion from 1.8Vor 1.5V inputs Designedfor use with low ESR ceramic capacitors 0.8V, 1.2V and 1.5V standard voltages available Ultra low dropout voltage (115mV@ 1.5A typ) 1.5% initial output accuracy Load regulationof 0.1%/A (typical) 30nA quiescent currentin shutdown (typical) Low groundpin currentatall loads Over temperature/over current protection Availablein5 lead TO220 and TO263 packages −40˚Cto +125˚C junction temperature range
Applications ASIC Power SuppliesIn: Desktops, Notebooks, and Graphics Cards, Servers Gaming Set Top Boxes, Printers and Copiers Server Core andI/O Supplies DSP and FPGA Power Supplies SMPS Post-Regulator
Typical Application Circuit20103001 Minimum value requiredif Tantalum capacitoris used (see Application Hints).
December 2004
LP38842
1.5A
Ultra
Low
Dropout
Linear
Regulators
Stable
with
Ceramic
Output
Capacitors
