AS1310
Datasheet - Application Information
9 Application Information
The AS1310 is available with fixed output voltages from 1.8V to 3.3V in 50mV steps.
Figure 14. AS1310 Block Diagram
0.7 to 3.6V
6.8µH
Zero
1.8V to 3.3V
Output
Input
Crossing
LX
VOUT
Detector
COUT
22µF
CIN
22µF
Startup
Circuitry
Driver
and
R3
VIN
LBI
Control
Logic
–
+
LBO
REF
Imax
Detection
VREF
AS1310
EN
CREF
100nF
GND
9.1 AS1310 Features
Shutdown. The part is in shutdown mode while the voltage at pin EN is below 0.1V and is active when the voltage is higher than 0.7V.
Note: EN can be driven above VIN or VOUT, as long as it is limited to less than 3.6V.
Output Disconnect and Inrush Limiting. During shutdown VOUT is going to 0V and no current from the input source is running through
the device. This is true as long as the input voltage is higher than the output voltage.
Feedthrough Mode. If the input voltage is higher than the output voltage the supply voltage is connected to the load through the device. To
guarantee a proper function of the AS1310 it is not allowed that the supply exceeds the maximum allowed input voltage (3.6V).
In this feedthrough mode the quiescent current is 35µA (typ.). The device goes back into step-up mode when the oputput voltage is 4% (typ.)
below VOUTNOM.
www.austriamicrosystems.com/DC-DC_Step-Up/AS1310
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