GENERAL DESCRIPTION
This controller also contains an error amplifier circuit as well as a soft-start circuit that prevents inrush-current at startup. An enable function and thermal shutdown functions are built inside. FEATURES
Input voltage: 3.0V to 24V Output voltage: Define by N-channel MOS. Duty ratio: 0% to 80% PWM control Oscillation frequency: 500KHz (±20%) . Enable function Soft-Start function Thermal Shutdown function External SW N-channel MOS. MSOP-8L & SOP-8L Pb-Free Package. 1/10 Axelite Confidential Materials, do not copy or distribute without written consent. Rev.0.1 Jun.30, 2006 AX5301 (Preliminary) Block Diagram VCC Phase Compensation + Vref with CE PVCC FB + Buffer Driver GATE PWM Controller Thermal Shutdown Oscillator PGND EN GND PIN ASSIGNMENT These packages of AX3301are MSOP-8L & SOP-8L; the pin assignment is given by: ( Top View ) EN Vcc PVcc FB 1 2 AX5301 3 4 MSOP - 8L & SOP - 8L 8 GND 7 PGND 6 NC 5 GATE DESCRIPTION
Shutdown Control Input. H：normal operation(Step-down) EN L：Shutdown mode FB Feedback pin VCC Signal VCC supply pin PVCC Power VCC supply pin Gate drive for external N-channel GATE MOSFET.
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