AP3445W6-7

AP3445/L 1MHZ, 2A STEP-DOWN DC-DC BUCK CONVERTER Description Pin Assignments NEW PRODUCT The AP3445 and AP3445L is a 2A step-down DC-DC converter. At heavy load, the constant-frequency PWM control performs excellent stability and transient response. No external compensation components are required. The AP3445/L supports a range of input voltages from 2.7V to 5.5V allowing the use of a single Li+/Li-polymer cell, multiple Alkaline/NiMH cell, and other standard power sources. The output voltage is adjustable from 0.6V to the input voltage. The AP3445/L employs internal power switch and synchronous rectifier to minimize external part count and realize high efficiency. During shutdown, the input is disconnected from the output and the shutdown current is less than 1μA. Other key features include over-temperature and short circuit protection, and under-voltage lockout to prevent deep battery discharge. (Top View) Pin 1 Mark EN 1 6 FB GND 2 5 PG LX 3 4 VIN The AP3445/L delivers 2A maximum output current while consuming only 55μA of no-load quiescent current. Ultra-low RDS(ON) integrated MOSFETs and 100% duty cycle operation make the AP3445/L an ideal choice for high output voltage, high current applications which require a low dropout threshold. Pulse skip mode to maintain high efficiency at light-load conditions. SOT26 (SC74R) The AP3445/L is available in SOT26 (SC74R) package. Features Applications  Input Voltage: 2.7V to 5.5V  Post DC-DC Voltage Regulation  Output Voltage: 0.6V to VIN  Set Top Boxes  0.6V Reference Voltage with ±1.5% Precision  Notebook Computer  55µA (Typ) No Load Quiescent Current  PAD  Shutdown Current: