AX3833 Datasheet | AXElite

AX3833 High Efficiency, 500KHz, 2.6A, 18V Input Synchronous Step Down Regulator  GENERAL DESCRIPTION The AX3833 is a high efficiency 500 k Hz synchronous step-down DC-DC converter capable of delivering 2.6A current. The AX3833 operates over a wide input voltage range from 4.5V to 18V and integrates main switch and synchronous switch with very low RDS(ON) to minimize the conduction loss. Low output voltage ripple and small external inductor and capacitor sizes are achieved with 500 k Hz switching frequency. It adopts the instant PWM architecture to achieve fast transient responses for high step down applications.  Features - Low RDS(ON) for internal switches (top/bottom): 80mΩ/40mΩ - 4.5-18V input voltage range - 2.6A output current capability - 500 k Hz switching frequency - Instant PWM architecture to achieve fast transient responses. - Cycle-by-cycle peak current limitation - Internal softstart limits the inrush current - ±1.5% 0.6V reference - TSOT-23-6L package Applications Set Top Box Portable TV Access Point Router DSL Modem LCD TV 1/11 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.0 Oct.14, 2013  BLOCK DIAGRAM  PIN ASSIGNMENT The package of AX3833 is TOST-23-6L; the pin assignment is given by: Name Description Boot-Strap Pin. Supply high side gate BS driver. Decouple this pin to LX pin with 0.1u F ceramic cap. (Top View) GND Ground pin Output Feedback Pin. Connect this pin 6 LX BS 1 to the center point of the output resistor FB divider (as shown in Figure 1) to GND 2 5 IN program the output voltage: VOUT=0.6- (1+R1/R2) FB 3 4 EN Enable control. Pull high to turn on. Do EN not float. TSOT-23-6L Input pin. Decouple this pin to GND pin IN with at least 1u F ceramic cap Inductor pin. Connect this pin to the LX switching node of inductor 2/11 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.0 Oct.14, 2013  ORDER/MARKING INFORMATION Order Information Top...