AT1308

Features:

•Operating Voltage:2.5V~6.0V
•High Operating Frequency: 1MHz
•Built-in N-MOS, _Rds(on) 0.3 (TYP)
•High Output Voltage: Up to 28V
•Shutdown Current <1µA
•Built-in Cycle-by-Cycle Current-limited.
•Built-in Soft-Start Function.
•1.5% 1.23V Reference.
•Tiny SOT-25 Package



Application

• STN/OLED Bias
• Personal Digital Assistants (PDAs)
• DSC


Pinout




Specifications

Parameter	Rated Value	Unit
VIN voltage	-0.3 to +6.5	V
LX voltage	-0.3 to +30	V
EN , FB to GND	-0.3 to +6.5	V
Switch Current (ILX)	0.8	A
Continuous power dissipation (SOT-25 Ta=+25OC)	0.25	W
Operating Junction Temperature Range	-30 to 85
Lead Temperature (Soldering 5 sec)	260
Storage Temperature	-65 to 125
Package Thermal Resistance (JA)	250	/W
ESD Susceptibility (HBM)	2	KV
ESD Susceptibility (MM)	200	V

Description

   The AT1308step-up converter is designed for small or medium size LCD panel of high bias voltage with a constant current to provide PDAs,and other hand-held devices. It features a fast 1.0 MHz current-mode PWM control with a built-in 0.3 N-MOS that allows for smaller capacitor and inductor. Fault condition protection uses cycle-by-cycle cu-rrent limiting to sense maximum inductor current and thermal protection. Also included soft-start circuitry eliminates inrush current during start-up. The AT1308 is available in 5-pin SOT-25 packages.