Features: •Operating Voltage:2.5V to 6.0V.•High Operating Frequency: 1.4MHz•High Output Voltage: Up to 28V•Shutdown Current <1µA•Digital Dimming Control.•Built-in Cycle-by Cycle Current-Limiting.•Built-in Soft-Start Function.•±1.5% 1.23V Ref...
AT1309: Features: •Operating Voltage:2.5V to 6.0V.•High Operating Frequency: 1.4MHz•High Output Voltage: Up to 28V•Shutdown Current <1µA•Digital Dimming Control.•...
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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) |
1.8 |
A | |
Continuous power dissipation (SOT-25 Ta=+25) |
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*2 | HBM |
2 |
KV |
MM |
200 |
V |
The AT1309 step-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. AT1309 features a fast 1.4 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 current limiting to sense maximum inductor current and thermal protection. Also included soft-start eliminates inrush current during start-up.
The AT1309 is available in 5-pin SOT-25 packages.