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4.5A PMIC Solution for 12V Adapter Systems with 2-Output High Performance Step-Down Converters

Topologie: Buck
Eingangsspannung (min.): 6.00 V
Eingangsspannung (max.): 24.00 V
Schaltfrequenz (min.): 350.00 kHz
Schaltfrequenz (max.): 650.00 kHz
Ausgang 1: 5.00 V / 4.500 A


The AAT2688 provides two independently regulated DC outputs: a high voltage synchronous step-down (Buck) regulator and a low input voltage step-down low dropout (LDO) regulator. The PMIC is optimized for low cost 12V adapter inputs, making the device the ideal system-ona- chip power solution for consumer communications requipment.Channel 1 is a step-down regulator with an input voltage range of 6.0V to 24V, providing up to 4.5A output current. 490kHz fixed switching frequency allows small L/C filtering components. Channel 1 utilizes voltage modecontrol configured for optimum performance across the entire output voltage and load range. Channel 2 is a low-dropout (LDO) regulator providing up to 600mA output current. The device provides low output noise, low quiescent current, and excellent transient response.The step-down regulator includes integrated over-current, soft-start and over-temperature protection. Independent input and enable pins provide maximum design flexibility.The AAT2688 is available in the Pb-free 4mm x 5mm 24-pin TQFN package. The rated operating temperature range is -40°C to 85°C.


  • 2-Output Step-Down Converters:
  • Channel 1 (Buck): VIN1 = 6.0 to 24.0V
  • VOUT1 Adjustable from 0.8V to 5.5V
  • IOUT1 up to 4.5A
  • High Switching Frequency
  • Voltage Mode Control
  • High Accuracy ±1.5%
  • PWM Fixed Frequency for Low Ripple
  • Channel 2 (LDO): VIN2 = 2.7V to 5.5V
  • IOUT2 up to 600mA
  • 1V Dropout Voltage at 600mA IOUT
  • Small Solution Size
  • System on a Chip
  • Ultra-small External L/C
  • Shutdown Current <35μA
  • Independent Enable Pins
  • Over-Current and Over-Temperature Protection
  • Internal Soft Start
  • 4x5mm 24-Pin TQFN Low Profile Package
  • 40°C to 85°C Temperature Range


  Artikel Nr. SPEC Produktserie L
RDC typ.
RDC max.
Version Muster
7447789004 PDF WE-PD SMT-Speicherdrossel 4.7 2.9 3.9 33 35 45 Robust