AS1364 - Demo Board Manual Low Dropout Regulator Demo Board Manual AS1364 1A, Low-Dropout Linear Voltage Regulator www.austriamicrosystems.com/LDO/AS1364 www.austriamicrosystems.com Revision 1.00 1-5 AS1364 - Demo Board Manual Low Dropout Regulator General Description Board Description G C H I B L M A F D K E O C B A D J N Figure 1: Board Description - Connectors Figure 2: Board Description – Measurement Points Connector Description Label Name Description Info A B VIN GND Supply Voltage Ground Supply voltage range from 2.0V to 5.5V C EN Active High Enable Input D VOUT Output Voltage Set the digital input “high” for normal operation. For shutdown, set “low” Output voltage range from 1.2V to 4.5V (fixed) Output voltage range from 1.2V to 5.3V (adjustable) Measurement Point Description Label Name Description E F G H I J K L VIN GND EN POK BP SET VOUT Load Supply Voltage Ground Active High Enable Input Open Drain POK Output BP (fixed Vout version) SET (adjustable Vout version) Output Voltage External load Info Measurement Points ON: The AS1364 is enabled M N O EN R1 R2 www.austriamicrosystems.com OFF: The AS1364 is disabled Enable Resistor divider for adjustable Vout version Revision 1.00 No Jumper: Connect a valid enable signal via external connector “C”. R1 between Vout and SET R2 between SET and GND 2-5 AS1364 - Demo Board Manual Low Dropout Regulator Getting Started The AS1364 Demoboard is designed to work with the AS1364 fixed output voltage version. The AS1364 fixed Vout version is available with 1.5V, 1.8V, 3.0V, 3.3V and 4.5V. The AS1364-AD Demoboard is designed to work with the AS1364 adjustable output voltage version. The AS1364-AD adjustable Vout version has a valid Vout range from 1.2V to 5.3V. This Vout is adjustable via the resistor divider R1/R2. A value for R2 in the range of 25kΩ to 100kΩ should be sufficient. To use the factory preset Vout of 3.3V connect SET directly to GND (R1 = open; R2 = 0Ω). Bill of Materials Ref. Function Value Description Manufacturer Cin Input Capacitor 4.7µF 1206 / X7R / 16V diverse Cout Output Capacitor 4.7µF 1206 / X7R / 16V diverse CBP* Bypass Capacitor 10nF 0805/X7R diverse RPOK POK pull-up resistor 100kΩ 0805 diverse U1 LDO ASRx 8pin TDFN 3x3 Austriamicrosystems AG Mfg. Order Nr. AS1364-BTDT-xx *) only for fixed Vout version www.austriamicrosystems.com Revision 1.00 3-5 AS1364 - Demo Board Manual Low Dropout Regulator Layout of Demo Board Board schematics and layout Figure 3: Schematics (fixed Vout) Figure 4: Schematics (adjustable Vout) Figure 5: Top + Bottom Layer (fixed Vout) Figure 6: Top + Bottom Layer (adjustable Vout) www.austriamicrosystems.com Revision 1.00 4-5 AS1364 - Demo Board Manual Low Dropout Regulator Copyright Copyright © 1997-2010, austriamicrosystems AG, Tobelbaderstraße 30, 8141 Unterpremstätten - Graz, Austria Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, translated, stored, or used without the prior written consent of the copyright owner. All products and companies mentioned are trademarks or registered trademarks of their respective companies. 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