AX3203

Features:

• 3.3V, 5V, 12V and adjustable
• Adjustable version output voltage range: 1.3-37V
• ±4% max over line and load conditions
• 150KHz ±15% fixed switching frequency
• TTL shutdown capability
• Operating voltage can be up to 40V
• Output load current: 5A
• TO220-5L and TO263-5L packages
• Low power standby mode
• Thermal-shuntdown and current-limit protection
• High efficiency
• Built-in switching a transistor on chip, requires only 4 external components


Application

• Simple High-efficiency step-down regulator
• Positive to negative converter
• On-card switching regulators


Pinout




Specifications

Parameter	Symbol	Valu	Unit
Supply Voltage	VCC	40	V
On/Off Pin Input Voltage	VSD	-0.3~+25	V
Feedback Pin Voltage	VFB	-0.3~+25	V
Output Voltage to Ground	VOUT	-1	V
Power Dissipation	PD	Internally Limited	W
Operating Temperature	Topr	-40~+125
Storage Temperature	Tstg	-65~+150
Operating Voltage	VOP	+4.5~+40	V
Human Body Model	(Note 2)	2000	V

Description

The AX3203 is Monolithic IC that design for a step-down DC/DC Converter, and own the ability of driving a 5A load without additional transistor component. The output version included 3.3V, 5V, 12V and an adjustable type. It operates at a switching frequency of 150KHz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed ±4% tolerance on output voltage under specified input voltage and output load conditions, and ±15% on the oscillator frequency. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch.