AT1388

Features:

• Low start-up power supply voltage :1.4V(CH6)
• Wide supply voltage range from 2.5V to 6.5V (CH1~6)
• High speed operation is possible: Maximum 1 MHz
• Supports for up, flyback and up/down SEPIC conversion (AT1388:CH2,3,4,5,6 AT1388A:CH2,3,4,6)
• Supports for down and up/down Zeta conversion (AT1388:CH1 AT1388A:CH1,CH5 )
• Synchronized rectification on CH1,CH2
• Supports for inverting converter CH5
• Built-in On/Off function
• Built-in Soft-Start Function
• Built-in Short-Circuit Protection.



Application

• Digital Cameras
• CCD Imaging Devices
• Camcorders


Pinout




Specifications

Parameter	Symbol	Condition	Rating		Unit
			Min	Max
Power supply voltage	Vcc	--	--	6.5	V
Output current	Io	Output pin	--	30	mA
Output peak current	Io	Output pin, Duty5%	--	200	mA
Power dissipation	PD	Ta25 (LQFP-48P)	--	860	mW
Operation temperature	Topr	--	-30	85
Storage temperature	Tstg	--	-55	125

Description

The AT1388/AT1388A is a 6-channel PWM DC/DC control IC for low voltage applications with a soft start function and short circuit detection function. This IC is ideal for up conversion, down conversion, and up/down conversion (using a stepup/ step-down SEPIC ,Zeta system with free input and output settings). 6 channels can be built in the LQFP48 package, each channel be controlled, and soft-start.

The AT1388 include one comparator to generate low-battery warning outputs. It also contains two high efficiency topology by using synchronous rectification PWM(It can be disable by floating OUT1_2,OUT2_2.)