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High Current Synchronous Step-Up Regulator with Programmable Current Limit

Topologie: Boost
Eingangsspannung (min.): 2.40 V
Eingangsspannung (max.): 3.25 V
Schaltfrequenz (min.): 480.00 kHz
Schaltfrequenz (max.): 720.00 kHz
Ausgang 1: 5.50 V / 2.500 A


The AAT2215 SwitchReg™ is a high current, synchronous step-up converter with a programmable peak NMOS current limit. It is ideal to prevent the input current from overloading the system power in PC Card GSM/GPRS/3Gand WiMax modem card applications. The AAT2215's internal compensation is optimized for the large bulk tantalum output capacitors needed to support the output voltage during large load pulses.The output voltage may be programmed from 3.0V to 5.5V by external resistor divider. Light load switching frequency modulation and low quiescent current maintain high efficiency performance for light load modeconditions. Two current limits are designed into the AAT2215. One isthe low-side power MOSFET programmable peak current limit, which works when the device is in step-up regulation state. An external resistor is used to program the current limit from 600mA to 4.0A. The other is the highsidecurrent limit, which operates in a linear mode to limit inrush current to 750mA when the output charges up to the input voltage. The AAT2215 includes internal over-voltage protection and a system ready signal.The AAT2215 is available in a Pb-free, 3mm x 3mm, 12-pin TDFN package (TDFN33-12) rated from -40°C to +85°C.


  • 2.4V to VOUT + 0.25V Input Voltage Range
  • Adjustable 3.0V to 5.5V Output Voltage
  • Internal Compensation
  • 600kHz Switching Frequency
  • Programmable Peak NMOS Current Limit
  • (0.6A to 4.0A)
  • Synchronous P-Channel MOSFET
  • True Load Disconnect in Shutdown
  • Reverse Current Block When Enabled
  • Start-Up Inrush Current Limit (0.75A) and Overload
  • Current Limit (3A)
  • Up to 95% Efficiency
  • Active-Low Power Ready Indicator (RDY)
  • Very Low 55μA No-Load Operating Current
  • Less than 1μA Shutdown Current
  • 6V Output Over-Voltage Protection (OVP)
  • Thermal Shutdown Protection (TSHDN)
  • Short Circuit Protection
  • Low-Profile TDFN33-12 Package


  Artikel Nr. SPEC Produktserie L1
IR 1
RDC1 typ
RDC1 max.
fres 1
7440650033 PDF WE-TPC SMT-Speicherdrossel 3.3 5.3 4.7 15 20 55