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LP3855EMPX-ADJ NOPB-LP3855ET-ADJ/NOPB
1.5A Fast Response Ultra Low Dropout Linear Regulators
LP3855-ADJVIN VOUT
ADJ
GND
*CIN
*COUT
INPUT OUTPUT
1.5A
R1**
R2**
CFF**
VOUT = 1.216 x (1+ R1)SD
10 PF
10 PF
LP3855-ADJ 1.5A Fast Response Ultra Low Dropout Linear Regulators
Checkfor Samples: LP3855-ADJ
1FEATURES DESCRIPTIONThe LP3855-ADJ fast ultra low-dropout linear
Ultra Low Dropout Voltage regulators operate froma +2.5V to +7.0V input
• Stable with Selected Ceramic Capacitors supply. These ultra low dropout linear regulators
Low Ground Pin Current respond very quicklyto step changesin load, which
makes them suitable for low voltage microprocessor
• Load Regulationof 0.06% applications. The LP3855-ADJis developed ona
• 10nA Quiescent Currentin Shutdown Mode CMOS process which allows low quiescent current
• Specified Output Currentof 1.5A DC operation independentof output load current. This
CMOS process also allows the LP3855-ADJ to
• Availablein DDPAK/TO-263, TO-220 and SOT- operate under extremely low dropout conditions.
223 Packages Overtemperature/Overcurrent Protection Dropout Voltage: Ultra low dropout voltage; typically
24mVat 150mA load current and 240mVat 1.5A load
• −40°Cto +125°C Junction Temperature Range current.
APPLICATIONS Ground Pin Current: Typically 4mAat 1.5A load
current.
• Microprocessor Power Supplies
Shutdown Mode: Typically 10nA quiescent current
• GTL, GTL+, BTL, and SSTL Bus Terminators when the shutdown pinis pulled low.
• Power Supplies for DSPs
Adjustable Output Voltage: The output voltage may
• SCSI Terminator be programmed via two external resistors.
• Post Regulators High efficiency linear regulators Battery chargers Other battery powered applications
TYPICAL APPLICATION CIRCUIT
