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AIC1221

Ultra LDO 2A Linear Regulator With Adjustable & Bypass Pin

FEATURES
  • Guaranteed 2A Output Current
  • Fast Response in Line/Load Transient
  • Wide Operating Voltage Ranges: 1.8V to 6V
  • 0.01uA Shutdown Standby Current
  • Low Quiescent Current: 30uA
  • Fixed: 1.8V, 2.5V, 3.3V, 5V Output Voltage
  • Adjustable Output Voltage are available from 0.8~5.5V
  • Low Dropout:550mV at 2A and 3.3V output voltage, 480mV at 2A and 5V output voltage
  • High PSRR:70dB at 1kHz
  • Active Low or High Shutdown Control. Current Limit and Thermal Protection
  • Available in +/-2% Output Tolerance.
  • Available in SOT223-3, TO252-3, TO252-5 and SOP-8E Package
APPLICATIONS
  • LCD TV, LCD Monitor, DPF
  • Networking
  • STB
  • DVD, HDD Driver
  • Portable AV Equipment
  • PC Peripherals
DESCRIPTION
A low noise, high PSRR and ultra low dropout linear regulator AIC1221 is optimized for low ESR ceramic capacitors operation with 2A continuous current. The AIC1221 is designed for portable and wireless devices with demanding performance and space requirements.
The AIC1221 offers high precision output voltage of ±2% tolerance. Output voltage can also be adjusted for those other than the preset values.
A noise bypass pin is available for further reduction of output noise. The bypass pin could be floating if it’s unnecessary. At 2A load current and 5V output voltage, a 480mV dropout is performed. The quality of low quiescent current and low dropout voltage makes this device ideal for battery power applications. The high ripple rejection and low noise of the AIC1221 provide enhanced performances for critical applications.
In addition, a logic-level shutdown input is included, which reduce supply current to 0.01uA (typ.) in shutdown mode with fast turn-on time less than 100us. The AIC1221’s current limit and thermal protection provide protection against any overload condition that would create excessive junction temperatures.
TYPICAL APPLICATION


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