AX3010
AX3010 is 2A PWM Buck DC/DC Converter manufactured by AXElite.
DESCRIPTION
The AX3010 series are monolithic IC designed for a step-down DC/DC converter, and own the ability of driving a 2A load without additional transistor. It saves board space. The external shutdown function can be controlled by logic level and then e into standby mode. The internal pensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage; current limit is against over current operating of the output switch that set by outside resistance. If current limit function occurs and VFB is down below 0.3V, the switching frequency will be reduced to 10 KHz; and over voltage protection (OVP) that can avoid high VOUT voltage to damage circuit and capacitor. The EN/SS pin supply soft-start function that prevents overshoot and inrush current at startup, the soft-start time is be set up by outside capacitance. The chip is available in SOP-8L-EP package which features small size as SOP-8L with an Exposed Pad to reduce the junction-to-case resistance. FEATURES
Maximum adjustable output voltage up to 38V. Ñb€ y
- Typical switching frequency w`R is 50K Hz m Û m V Voltage mode non-synchronous PWM .co converter.
Thermal-shutdown and current-limit tec protection. o f ON/OFF shutdown w and soft-start control input. .go w w (SCP). Short Circuit Protect External current limit setting. Over Voltage Protect (OVP). Operating voltage can be up to 40V. Output load current: 2A. SOP-8L-EP Pb-Free package. Built-in switching transistor on chip. h
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Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.4 Apr. 19, 2011
BLOCK DIAGRAM
EN/SS
V CC
142mΩ
START-UP
CURRENT SOURCE BIAS
1.23V REFERENCE
2.5V REGULATOR
P.
_
+ _
OCSET
P.
+
P.
SENSE
+ AMP _
+
P.
P.
CONTROL + DRIVER
Thermal Shutdown
PIN ASSIGNMENT The package of AX3010 is SOP-8L-EP; the pin assignment is given by:
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