AS1339 EB austriamicrosystems, AS1339 EB Datasheet - Page 3

• Manufacturer Part Number: AS1339 EB
• Description: BOARD EVAL AS1339
• Manufacturer: austriamicrosystems

Specifications of AS1339 EB

• Main Purpose: DC/DC, Step Down with LDO
• Outputs And Type: 3, Non-Isolated
• Voltage - Output: 0.8 ~ 3.75 V, 2.85V, 2.85V
• Current - Output: 650mA
• Voltage - Input: 2.7 ~ 5.5 V
• Regulator Topology: Buck
• Frequency - Switching: 2MHz
• Board Type: Fully Populated
• Utilized Ic / Part: AS1339
• Lead Free Status / RoHS Status: Lead free by exemption / RoHS compliant by exemption
• Power - Output: -

AS1339 - Evaluation Board
Application Note
Jumper Description
Label
G
H
I
J
Note:
Operational sequence
This evaluation board comes with the AS1339.
If there are questions do not hesitate to contact us. See contact information at the end of the application note.
www.austriamicrosystems.com
1.
2.
3.
-
-
Drive the IC on the evaluation board only with the recommended settings and values as described in the
datasheet.
Connect a 2.7V to 5.5V power supply (VIN “A” and GND “B”).
Perform measurements at the measurement points “K” to “U”.
Name
PA_EN
EN1
EN2
R2, R1
For all current measurements remove both jumper “J” (R1 and R2).
Due to the tolerances of the external resistances R1 and R2, the stated output voltages of the Step-
Down converter are not guaranteed.
Description
Enable Jumper Step-
Down
Enable Jumper LDO1
Enable Jumper LDO2
Voltage Divider
Pull - up
Pull - down
Connector F (REFIN)
Info
Revision 1.00
ON = The Step-Down of the AS1339 is on.
OFF = The Step-Down of the AS1339 is off.
ON = The LDO1 of the AS1339 is on.
OFF = The LDO1 of the AS1339 is off.
ON = The LDO2 of the AS1339 is on.
OFF = The LDO2 of the AS1339 is off.
R2 and R1 are set;
The Output Voltage of the Step-Down is regulated to
1.8V.
R2 is open, R1 is set;
The Output Voltage of the Step-Down is regulated to
3.75V or is in Bypass Mode.
R2 is set, R1 is open;
The Output Voltage of the Step-Down is regulated to
maximum 0.8V.
R2 and R1 are open;
The Output Voltage of the Step-Down can be set via an
external source on Connector “F” (REFIN). Allowed
Voltage Range on REFIN: GND to VIN
3 - 5