AP3440:Buck Converter

Part NumberData SheetSPICE ModelTypeEfficiency (%)RDS(ON) (mΩ)Frequency Typ (kHz)MinimumInput Voltage (V)MaximumInput Voltage (V)Output Current (A)Output Voltage (V)Standby Quiescent Current Typ (µA)
AP3440AP3440.pdf-Buck94-3002.955.54ADJ2
Description

The AP3440 is a current mode, PWM synchronous buck (step-down) DC-DC converter, capable of driving a 4A load with high efficiency, excellent line and load regulation.
 
The device integrates two N-channel power MOSFETs with low on-resistance. Current mode control provides fast transient response and cycle-by-cycle current limit.
 
The switching frequency of AP3440 can be programmable from 200kHz to 2MHz, which allows small-sized components, such as capacitors and inductors. A standard series of inductors from several different manufacturers are available. This feature greatly simplifies the design of switch-mode power supplies.
 
Under voltage lockout is internally set at 2.6V, but can be increased by programming the threshold with a resistor network on the enable pin. The output voltage startup ramp is controlled by the soft-start pin. An open drain power good signal indicates the output is within 93% to 107% of its nominal voltage.
 
The AP3440 is available in U-QFN3030-16 package.

Application
  • Low-voltage, High-density Power Systems
  • Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors
  • Broadband, Networking and Optical Communications Infrastructure
Ordering Information
  • AP3440FNTR-G1
U-QFN3030-16
AP3440.pdf AP3440
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