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LP3892EMRX-1.5/NOPB-LP3892ES-1.2/NOPB
1.5A Fast-Response Ultra Low Dropout Linear Regulators 8-SO PowerPAD -40 to 125
LP3892
www.ti.com SNVS236D–SEPTEMBER 2003–REVISED APRIL 2013
LP3892 1.5A Fast-Response Ultra Low Dropout Linear Regulators
Checkfor Samples: LP3892
1FEATURES DESCRIPTIONThe LP3892isa high current, fast response regulator
Ultra Low Dropout Voltage (140 mVat 1.5A which can maintain output voltage regulation with
typ) minimum inputto output voltage drop. Fabricated on
• Low Ground Pin Current a CMOS process, the device operates from two input
Load Regulationof 0.04%/A voltages: Vbias provides voltageto drive the gateof
the N-MOS power transistor, while Vinis the input
• 60 nA Typical Quiescent Currentin Shutdown voltage which supplies powerto the load. The useof
• 1.5% Output Accuracy (25°C) an external bias rail allows the partto operate from
TO-220, DDPAK/TO-263 and SO PowerPAD-8 ultra low Vin voltages. Unlike bipolar regulators, the
Packages CMOS architecture consumes extremely low
quiescent currentat any output load current. The use
• Over Temperature/Over Current Protection of an N-MOS power transistor results in wide
• −40°Cto +125°C Junction Temperature Range bandwidth, yet minimum external capacitance is
requiredto maintain loop stability.
APPLICATIONS The fast transient responseof these devices makes
• DSP Power Supplies them suitable for use in powering DSP,
Microcontroller Core voltages and Switch Mode
• Server Core and I/O SuppliesPower Supply post regulators. The parts are available
• PC Add-in-Cards in TO-220, DDPAK/TO-263 and SO PowerPAD-8
• Local Regulatorsin Set-Top Boxes packages.
Microcontroller Power Supplies Dropout Voltage:140mV (typ)at 1.5A load current.
• High Efficiency Power Supplies Ground Pin Current:3 mA (typ)at full load.
• SMPS Post-Regulators
Shutdown Current:60 nA (typ) when S/D pinis low.
Precision Output Voltage: 1.5% room temperature
accuracy.
TYPICAL APPLICATION CIRCUITis requiredfor electrolytic capacitors maybe used
