AS1331-BTDT-30-1K austriamicrosystems, AS1331-BTDT-30-1K Datasheet
AS1331-BTDT-30-1K
Specifications of AS1331-BTDT-30-1K
Related parts for AS1331-BTDT-30-1K
AS1331-BTDT-30-1K Summary of contents
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... This special device is a synchronous buck-boost DC/DC converter which can handle input voltages above, below, or equal to the output voltage. Due to the internal structure of the AS1331 which is working continuously through all operation modes this device is ideal for dual or triple cell alkaline/NiCad/NiMH as well as single cell Li-Ion battery applications. ...
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... GND www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 VOUT SW2 2 GND 9 PGND 3 AS1331 LBO 8 SW1 4 LBI 7 VIN Description Output of the Buck/Boost Converter. Buck/Boost Switch Pin. Connect the inductor from SW1 to SW2 Power Ground. Both GND pins must be connected. Buck/Boost Switch Pin. Connect the inductor from SW1 to SW2. An optional Schottky diode can be connected between this pin and VOUT to increase efficiency ...
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... Parameter SW1, SW2, VIN, VOUT, EN PGND to GND SW1, SW2 ESD Thermal Resistance θ JA Junction Temperature Operating Temperature Range Storage Temperature Range Package Body Temperature www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 may cause permanent damage to the device. These are stress ratings only, Min Max Units -0 -0.3 +0 ...
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... V ENL EN Input Current I EN Low Battery & Power-OK V LBI Threshold LBI LBI Hysteresis LBI Leakage Current 3 LBO Voltage Low LBO Leakage Current Power-OK Threshold www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 = +25ºC. Unless otherwise specified. AMB Conditions I < 1mA LOAD V decreasing IN 3.201 No Load 2.910 2.425 No Load 1.212 ...
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... The voltage at the LBI pin is below LBI threshold. 2) The voltage at the LBI pin is below 0.1V and V Note: All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 Conditions 10°C Hysteresis is below 92.5% of its nominal value. ...
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... Output Current (mA) Figure 7. I max vs. Input Voltage OUT 500 400 300 200 100 0 1.8 2.2 2.6 3.0 3.4 3.8 4.2 4.6 5.0 5.4 Input Voltage (V) www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 = 3.3V +25°C, unless otherwise specified. OUT AMB = 2.5V Figure 4. Efficiency vs. Output Current; V OUT 100 ...
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... Load Current (mA) Figure 13. I vs. Temperature 0.4 3.6V 5.0V 0.3 5.5V 0.2 0.1 0 -0.1 -0.2 -45 -30 - Temperature (°C) www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 Figure 10. V Ripple vs. Input Voltage OUT 250 200 150 100 50 0 1.5 2 2.5 Figure 12. V Regulation vs. Temperature OUT 3.5 3.25 3 2.75 2.5 2.25 ...
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... AS1331 Datasheet - Figure 15 4.4V 3.3V OUT OUT 5µs/Div Figure 17 3.6V 3.3V OUT OUT 5µs/Div Figure 19 2.5V 3.3V OUT OUT 5µs/Div www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 = 200mA Figure 16 4.4V 200mA Figure 18 3.6V 200mA Figure 20 2.5V Revision 1.04 = 3.3V 50mA OUT OUT 5µs/Div = 3.3V 50mA OUT OUT 5µ ...
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... AS1331 Datasheet - Figure 21. Shorted Output 3.6V IN 1µs/Div www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 Figure 22. Startup 3.6V load 500µs/Div Revision 1.04 = 3.3kΩ ...
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... EN Shutdown Modes of Operation When V drops below the reference threshold, the AS1331 switches on the transistors SW A and SW C until the OUT inductor current reaches approximately 400mA. In the next step SW A and SW D are closed and depending on the difference between V and V the inductor current raises, falls or stays constant. ...
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... A good thermal path has to be provided to dissipate the heat generated within the package. Otherwise it’s not possible to operate the AS1331 at its useable maximal power. To dissipate as much heat as possible away from the package into a copper plane with as much area as possible, it’s recommended to use multiple vias in the printed circuit board. ...
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... AS1331 Datasheet - Output Voltage Selection The AS1331 is available in two versions fixed output voltage (see Figure 25) and the other version can operate with user-adjustable output voltages from 2.5V to 3.3V by connecting a voltage divider between the pins Figure 24. LiIon to Adjustable Output Voltage LiIon Battery ...
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... Only three power components are required to complete the design of the buck-boost converter. For the adjustable version V programming resistors are needed. The high operating frequency and low peak currents of the AS1331 OUT allow the use of low value, low profile inductors and tiny external ceramic capacitors. ...
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... Dimension b applies to metallized terminal and is measured between 0.15 and 0.30mm from terminal tip refers to the maximum number of terminals on D side. 8. Unilateral coplanarity zone applies to the exposed heat sink slug as well as the terminals. www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 SEE DETAIL B B ...
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... AS1331-BTDT-AD ASRP adjustable AS1331-BTDT-25* ASRR 2.5V AS1331-BTDT-30* ASRT 3.0V AS1331-BTDT-33 ASRU 3. request Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: For further information and requests, please contact us or find your local distributor at www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 Table 8 ...
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... No obligation or liability to recipient or any third party shall arise or flow out of austriamicrosystems AG rendering of technical or other services. Contact Information Headquarters austriamicrosystems AG Tobelbaderstrasse 30 A-8141 Unterpremstaetten, Austria Tel: +43 (0) 3136 500 0 Fax: +43 (0) 3136 525 01 For Sales Offices, Distributors and Representatives, please visit: http://www.austriamicrosystems.com/contact www.austriamicrosystems.com/DC-DC_Buck-Boost/AS1331 Revision 1. ...