LP3893ESX-1.2/NOPB ,3A Fast-Response Ultra Low Dropout Linear Regulators 5-DDPAK/TO-263 -40 to 125FEATURES DESCRIPTIONThe LP3893 is a high-current, fast-response regulator2• Ultra Low Dropout Volta ..
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LP3893ESX-1.2/NOPB
3A Fast-Response Ultra Low Dropout Linear Regulators 5-DDPAK/TO-263 -40 to 125
LP3893
www.ti.com SNVS237B –SEPTEMBER 2003–REVISED APRIL 2013
LP3893 3A Fast-Response Ultra Low Dropout Linear Regulators
Checkfor Samples: LP3893
1FEATURES DESCRIPTIONThe LP3893isa high-current, fast-response regulator
Ultra Low Dropout Voltage (270 mVat 3A typ) which can maintain output voltage regulation with
• Low Ground Pin Current minimum inputto output voltage drop. Fabricated on
Load Regulationof 0.04%/A a CMOS process, the device operates from two input
voltages: Vbias provides voltageto drive the gateof
• 60 nA Typical Quiescent Currentin Shutdown the N-MOS power transistor, while Vinis the input
• 1.5% Output Accuracy (25°C) voltage which supplies powerto the load. The useof
• TO-220, DDPAK/TO-263 Packages an external bias rail allows the partto operate from
ultra low Vin voltages. Unlike bipolar regulators, the
• Over Temperature/Over Current Protection CMOS architecture consumes extremely low
• −40°Cto +125°C Junction Temperature Range quiescent currentat any output load current. The use an N-MOS power transistor results in wide
APPLICATIONS bandwidth, yet minimum external capacitance is
requiredto maintain loop stability.
• DSP Power Supplies Server Core and I/O Supplies The fast transient responseof these devices makes
them suitable for use in powering DSP,
• Linear Power Supplies for PC Add-in-Cards Microcontroller Core voltages and Switch Mode
• Set-Top Box Power Supplies Power Supply post regulators. The parts are available
• Microprocessor Power Supplies in TO-220 and DDPAK/TO-263 packages.
High Efficiency Linear Power Supplies Dropout Voltage: 270 mV (typ)at 3A load current.
SMPS Post-Regulators Ground Pin Current:3 mA (typ)at full load.
Shutdown Current:60 nA (typ) when S/D pinis low.
Precision Output Voltage: 1.5% room temperature
accuracy.
TYPICAL APPLICATION CIRCUITis requiredfor electrolytic restricted temperature
