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AX3010 Dataheets PDF



Part Number AX3010
Manufacturers AXElite
Logo AXElite
Description 2A PWM Buck DC/DC Converter
Datasheet AX3010 DatasheetAX3010 Datasheet (PDF)

AX3010 50KHz, 2A PWM Buck DC/DC Converter  GENERAL 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 come into standby mode. The internal compensation makes feedback control having good line and load regulation without external design. Regarding protected function, thermal shutdown is to pr.

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AX3010 50KHz, 2A PWM Buck DC/DC Converter  GENERAL 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 come into standby mode. The internal compensation 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 1/11 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.4 Apr. 19, 2011 AX3010  BLOCK DIAGRAM EN/SS V CC 142mΩ START-UP CURRENT SOURCE BIAS 1.23V REFERENCE 2.5V REGULATOR COMP. _ + _ OCSET OVP COMP. + COMP. SENSE + AMP _ + COMP. COMP. CONTROL + DRIVER Thermal Shutdown FB COMP  PIN ASSIGNMENT The package of AX3010 is SOP-8L-EP; the pin assignment is given by: ( Top View ) SW SENSE FB COMP 1 2 3 4 SOP-8L-EP 8 Vcc VÛmw`R•yÑb€ w.goftech.com Vss 7 OCSET 6 EN/SS 5 Vss Description Switch pin. Connect external SW inductor and diode here SENSE Over Voltage Sense Input FB Output voltage feedback control COMP Compensation pin VSS GND pin ON/OFF Shutdown and EN/SS Soft-start pin Add an external resistor to set OCSET max switch output current VCC Operating voltage input Name Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.4 Apr. 19, 2011 _ 1.155V Current limit 50k Hz OSC. + 2.0A SWITCH _ SW Vss 2/11 AX3010  ORDER/MARKING INFORMATION Order Information Top Marking Logo AX3010 XX X Package Type Packing ES: SOP-8L-EP Blank : Tube A : Taping 3 0 10 AX Y Y WW X Part number ID code:internal WW:01~52 Year: 10=2010 11=2011  ABSOLUTE MAXIMUM RATINGS Characteristics Maximum Supply Voltage EN/SS Pin Input Voltage COMP Pin Input Voltage Feedback Pin Voltage OCSET Pin Input Voltage SW Pin Voltage SENSE Pin Voltage Power Dissipation Internally limited Storage Temperature Range Operating Temperature Range VÛmw`R•yÑb€ Thermal Resistance from Junction to case Thermal Resistance from Junction to ambient Symbol VCC VEN/SS VCOMP VFB VOCSET VSW VSENSE PD TST TOP θJC θJA Rating +45 -0.3 to 6 -0.3 to 6 -0.3 to 12 -0.3 to VCC -0.3 to VCC -0.3 to 12 ( TJ-TA ) / θJA -65 to +150 -40 to +125 15 40 Unit V V V V V V V W °C °C °C/W °C/W Note: θJA is measured with the PCB copper area (need connect to Exposed Pad) of approximately 3 in2 (Multi-layer). w.goftech.com 3/11 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.1.4 Apr. 19, 2011 AX3010  ELECTRICAL CHARACTERISTICS (Unless otherwise specified, TA=25°C, VCC=12V, VOUT=5V, ILOAD = 0.2A) Characteristics Symbol Conditions Min Typ Max Units Operating Supply Voltage Feedback Voltage Feedback bias current Line Regulation Load Regulation Quiescent Current Shutdown supply Current OCSET pin bias current Oscillator frequency Oscillator frequency of short circuit protect Max. Duty Cycle (ON) Min. Duty Cycle (OFF) Saturation voltage Sense Voltage SW pin leakage current w.goftech.com SW pin=0V SW pin leakage current SW pin=-0.8V EN pin logic input threshold voltage EN/SS pin charge current Thermal shutdown Temp Thermal Shutdown Hysteresis VCC VFB IFB VFB=1.5V VCC=10~40V IOUT=0~2A ICCQ VFB=2V force driver off ISD IOCSET FOSC FSCP VFB<0.3V DC VFB=0V force driver on VFB=12V force driver off VEN/SS=0V VCC=40V 4.5 40 V 1.143 1.155 1.167 V 90 40 -10 0.1 0.1 3 160 0.2 0.2 6 nA % % mA μA uA KHz KHz % V 110 130 55 10 100 0 1.0 70 1.2 VÛmw`R•yÑb€ IOUT=2A, No outside circuit VSA T V FB=0V force driver on VSENSE ISW L VIL VIH No outside circuit VFB=2V force driver off VCC=40V force driver off Low (regulator OFF) High (regulator ON) 1.205 1.23 1.255 V 2.0 -5 1.3 7 155 35 -200 μA 0.6 mA V μA °C °C IEN/SS VEN/SS=0V, VCC=40V TSD TSH 4/11 Ax.


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