Datasheet AS1301 5V/50mA Low Noise Inductorless Boost Converter 1 General Description The AS1301 is a 50mA inductorless boost converter using a double H-bridge charge-pump topology with two external flying capacitors. The AS1301 runs on a 1MHz fixed frequency and is utilized with a low noise regulation scheme to allow usage together with sensitive RF circuitry from the same battery supply. Designed to reside in portable and space limited equipment the 1MHz charge pump converts a 2.7 to 5.25V input to regulated 5V output with 5% accuracy. The shutdown function reduces the supply current to <5A and disconnects the load from the output. The integrated soft-start circuitry prevents current spikes being drawn from the battery during start-up. The AS1301 is available in TDFN (3x3x0.8mm) 10-pin and WL-CSP 8-bumps packages. ! <5A Shutdown Current ! 5V Tolerant Enable Signal ! Up to 50mA Load Current ! Overload Protection ! Output Disconnected During Shutdown ! Soft-Start ! No Inductor Required ! Small External Components Required (COUT 2.2F, CFLY 220nF) ! Low Noise Fixed Frequency 1MHz Charge Pump: ! - 1:1 Battery Feed Through Mode - 2:3 Single Phase Mode - 1:2 Dual Phase Mode Package Options: - TDFN (3x3x0.8mm) 10-pin - WL-CSP 8-bumps with 0.5mm pitch 2 Key Features ! Up to 92% Efficiency ! 2.7 to 5.25V Input Voltage ! Regulated 5V Output ! Automatic Mode Up-Switching 3 Applications The device is ideal for two or three AA cells or a single Li-Ion battery cell to 5V conversion, mobile phones, portable instruments, microprocessor based systems and remote data-acquisition systems. Figure 1. AS1301 - Typical Application Diagram CFLY1 C1+ VBATT CFLY2 C1- C2+ VBATT + C2- VOUT CBAT COUT 2.2F 2.2F On Off VOUT = 5V AS1301 EN www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 GND Revision 1.05 1 - 16 AS1301 Datasheet - P i n A s s i g n m e n t s 4 Pin Assignments Figure 2. Pin Assignments (Through View) C2+ 1 VOUT 2 9 VBATT NC 3 A1 A2 GND VOUT B1 B2 VBATT C1+ C1 C2 C2- C2+ D1 D2 C1- 8 C2- NC 4 NC 5 EN 10 C1- 7 C1+ GND 6 EN TDFN (3x3x0.8mm) 10-pin WL-CSP 8-bumps 4.1 Pin Descriptions Table 1. Pin Descriptions Pin Number TDFN Pin Number WLP Pin Name 1 D1 C2+ 2 B1 VOUT 3 - NC Connected to GND or left floating. 4 - NC Connected to GND or left floating. 5 - NC Connected to GND or left floating. 6 A1 EN Enable. (operating if EN = 1). Set this digital input to logic high for normal operation. For shutdown, set to logic low. 7 C1 C1+ Connector 1+. Positive terminal of flying cap 1. 8 C2 C2- Connector 2-. Negative terminal of flying cap 2. 9 B2 VBATT 10 D2 C1- Connector 1-. Negative terminal of flying cap 1. Exposed Pad A2 GND Ground. www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Description Connector 2+. Positive terminal of flying cap 2. +5V Output Voltage. This pin must be bypassed with a 2.2F low ESR ceramic capacitor. +2.7V to 5.25V Input Voltage. Bypass this pin to GND with a 2.2F low ESR ceramic capacitor. Revision 1.05 2 - 16 AS1301 Datasheet - A b s o l u t e M a x i m u m R a t i n g s 5 Absolute Maximum Ratings Stresses beyond those listed in Table 2 may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in Section 6 Electrical Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Table 2. Absolute Maximum Ratings Parameter Min Max Units All pins to GND -0.3 +7.0 V Operating Temperature Range -40 +85 C Storage Temperature Range -65 +125 C ESD Package Body Temperature www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 2 +260 Revision 1.05 Notes kV HBM MIL-Std. 883E 3015.7 methods C The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/ JEDEC J-STD-020 "Moisture/Reflow Sensitivity Classification for Non-Hermetic Solid State Surface Mount Devices". The lead finish for Pb-free leaded packages is matte tin (100% Sn). 3 - 16 AS1301 Datasheet - E l e c t r i c a l C h a r a c t e r i s t i c s 6 Electrical Characteristics VIN = 2.7 to 5.25V, VOUT = 5V, COUT = CBAT = 2.2F, CFLY1 = CFLY2 =220nF, TAMB = -40 to +85C. Typical values are at TAMB = +25C, unless otherwise specified. Table 3. Electrical Characteristics Symbol Parameter Conditions VON Startup Voltage, Rising VBATT VOFF Startup Voltage, Falling VBATT VBATT Typ Max Units 2.8 2.865 V 2.505 2.7 2.8 V Battery Supply Voltage VON/ VOFF 3.6 5.25 V VOUT Settled Average Output Voltage 4.75 5.0 5.25 V IOUT Load Current 50 mA Vripple Output Voltage Ripple tSTART Startup Time Iinr Inrush Current VO/IO11 Load Regulation in 1:1 Mode VBATT = 5V, IOUT = 10~50mA 2 VO/IO23 Load Regulation in 2:3 Mode VBATT = 4.5V, IOUT = 10~50mA 3 VO/IO12 Load Regulation in 1:2 Mode VBATT = 3.1V, IOUT = 10~50mA 3 12 Efficiency in Switching Mode VBATT = 3.1V, IOUT = 30mA 90 % 23 Efficiency in Switching Mode VBATT = 3.5V, IOUT = 30mA 90 % fOSC Oscillator Frequency optional selectable 1 MHz tdebup Up Switching Debounce Time 256 s IOP12 Operating Quiescent Current 1:2 mode without load 1.5 3.5 IOP23 Operating Quiescent Current 2:3 mode without load 1.3 3 IOP11 Operating Current 1:1 Mode without load 0.1 0.3 IOFF Shutdown Current EN = 0V 0.7 5 TOFFL Temperature Shutdown mode off 145 C TOFFH Temperature Shutdown mode on 170 C 1 after startup of 1ms Min 0 COUT = 2.2F, 50mA load mVPP 15 2 1 ms 500 mA mV/mA mA A Input Levels VIH Input High Level VIL Input Low Level pin EN 1.5 5.5 V 0.0 0.5 V 1. The device is tested in a proprietary test mode. 2. The inrush current is limited by the internal soft-start circuitry. 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_Step-Up/AS1301 Revision 1.05 4 - 16 AS1301 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s 7 Typical Operating Characteristics VIN = 2.7 to 5.25V, VOUT = 5V, COUT = CBAT = 2.2F, CFLY1 = CFLY2 =220nF, TAMB = +25C, unless otherwise specified. Figure 4. Efficiency vs. Input Voltage; ILOAD=20mA 100 100 90 90 80 80 70 60 50 1:2 mode 2:3 mode 1:1 mode 40 30 Efficiency (%) . Efficiency (%) . Figure 3. Efficiency vs. Input Voltage; ILOAD=10mA 70 60 50 10 10 3.75 4.25 4.75 0 2.75 5.25 3.25 100 100 90 90 80 80 70 50 2:3 mode 1:1 mode 40 30 60 50 10 4.25 4.75 0 2.75 5.25 Figure 7. Efficiency vs. Input Voltage; ILOAD=50mA . 70 1:2 mode 2:3 mode 1:1 mode 40 30 20 10 3.25 3.75 4.25 4.75 5.25 Quiescent Current (mA) 80 Efficiency (%) . 3.25 3.75 4.25 4.75 5.25 3.5 90 0 2.75 1:1 mode Figure 8. Quiescent Current vs. Input Voltage 100 50 2:3 mode Input Voltage (V) Input Voltage (V) 60 1:2 mode 30 10 3.75 5.25 40 20 3.25 4.75 70 20 0 2.75 4.25 Figure 6. Efficiency vs. Input Voltage; ILOAD=40mA Efficiency (%) . Efficiency (%) . Figure 5. Efficiency vs. Input Voltage; ILOAD=30mA 1:2 mode 3.75 Input Voltage (V) Input Voltage (V) 60 1:1 mode 30 20 3.25 2:3 mode 40 20 0 2.75 1:2 mode 3 2.5 2 1.5 1 0.5 0 2.25 Input Voltage (V) www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 3.25 4.25 5.25 Input Voltage (V) Revision 1.05 5 - 16 AS1301 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s Figure 10. Output Voltage vs. Output Current 5.3 5.3 5.2 5.2 Output Voltage (V) . Output Voltage (V) . Figure 9. Output Voltage vs. Output Current VBATT = 3V 5.1 VBATT = 4.5V 5 VBATT = 5V 4.9 5.1 5 4.9 4.8 4.8 4.7 4.7 VBATT = 3.5V VBATT = 4V 0.1 1 10 0.1 100 1 10 100 Output Current (mA) Output Current (mA) Figure 11. Output Voltage vs. Input Voltage Figure 12. Output Voltage vs. Temperature; IOUT=0.1mA 5.07 VBATT = 3.1V 10mA 4 30mA 50mA Output Voltage (V) . Output Voltage (V) . 5 3 2 5.06 VBATT = 4.2V VBATT = 3.6V 5.05 5.04 1 0 2.75 3.25 3.75 4.25 4.75 5.03 -40 5.25 -15 Figure 13. Output Voltage vs. Temperature; IOUT=10mA VBATT = 3.1V VBATT = 4.2V VBATT = 3.6V 5 VBATT = 3.1V 5 VBATT = 4.2V 4.9 VBATT = 3.6V 4.8 4.7 4.99 4.98 -40 85 5.1 Output Voltage (V) . Output Voltage (V) . 5.01 60 5.2 5.03 5.02 35 Figure 14. Output Voltage vs. Temperature; IOUT=30mA 5.05 5.04 10 Temperature (C) Input Voltage (V) -15 10 35 60 85 4.6 -40 www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 -15 10 35 60 85 Temperature (C) Temperature(C) Revision 1.05 6 - 16 AS1301 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s Figure 16. Efficiency vs. Output Current; VIN=3.3V 100 100 90 90 80 80 Efficiency (%) . Efficiency (%) . Figure 15. Efficiency vs. Output Current; VIN=3V 70 60 1:2 mode 50 40 30 70 60 2:3 mode 50 40 30 20 20 10 10 0 0 0.1 1 10 0.1 100 100 90 90 80 80 70 2:3 mode 50 10 100 Figure 18. Efficiency vs. Output Current; VIN=4V 100 1:2 mode 40 30 Efficiency (%) . Efficiency (%) . Figure 17. Efficiency vs. Output Current; VIN=3.5V 60 1 Output Current (mA) Output Current (mA) 70 60 2:3 mode 50 1:2 mode 40 30 20 20 10 10 0 0 0.1 1 10 0.1 100 Figure 19. Efficiency vs. Output Current; VIN=4.3V 90 90 80 80 70 2:3 mode 1:2 mode 40 30 Efficiency (%) . 100 50 10 100 Figure 20. Efficiency vs. Output Current; VIN=4.7V 100 60 1 Output Current (mA) Output Current (mA) Efficiency (%) . 1:2 mode 70 60 40 30 20 20 10 10 0 2:3 mode 50 0 0.1 1 10 100 0.1 Output Current (mA) www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 1 10 100 Output Current (mA) Revision 1.05 7 - 16 AS1301 Datasheet - Ty p i c a l O p e r a t i n g C h a r a c t e r i s t i c s 2V/Div 100mA/Div IBATT 200s/Div 5V/Div EN 100mA/Div 5V/Div VOUT Figure 24. Start-Up Time; VBATT=5.25V 2V/Div VOUT Figure 23. Start-Up Time; VBATT=3V IBATT 20mA/Div VOUT IOUT VOUT IOUT 20mA/Div 50s/Div 50s/Div EN 100mV/Div Figure 22. Load Transient; VBATT=3.6V 50mV/Div Figure 21. Load Transient; VBATT=5.2V 200s/Div f = 1kHz RLOAD = 1k Duty Cycle = 20% 100mA/Div IBATT VBATT 1V/Div VOUT 50mV/Div Figure 25. Line Transient; VBATT = 4.5V to 3.5V 200s/Div www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Revision 1.05 8 - 16 AS1301 Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description The AS1301 is a high efficiency and low noise switched capacitor DC-DC converter that is capable of boost operation. It is equipped with two built-in coupled H-bridge type switch configurations. Based on the value of the output voltage the system automatically initiates mode-switching to achieve the highest possible efficiency. The regulation of the output voltage is achieved by a regulation loop, which modulates the current drive capability of the power transistors so that the amount of charge transferred from the input to the output at each clock cycle is controlled and is equal to the charge needed by the load. 8.1 Regulation Loop The AS1301 operates at constant frequency at any load. For the regulation loop power transistors, a resistor divider, and an error amplifier is used to keep the output voltage within the allowed limits. The error amplifier takes the feedback and reference signals as inputs and generates the error voltage signal. The error voltage controls a driver that triggers the gate of the power transistor which modulates the current drive capability of the power transistors. The modulated power transistors control the charge transferred from the input to the output and therefore the regulation of the output voltage is realized. Based on adjusting the amount of charge transferred, this regulation concept delivers the smallest voltage ripple possible. Figure 26. AS1301 - Functional Block Diagram CFLY1 C1+ CFLY2 C1- VBATT C2+ C2VOUT Double-H Bridge Topology + CBAT COUT POR Ref Vctrl Temp Soft Start CLK On Off State Machine & Control Logic Mode Select Vmode trig EN AS1301 GND www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Revision 1.05 9 - 16 AS1301 Datasheet - D e t a i l e d D e s c r i p t i o n 8.2 Switch Configuration The AS1301 has nine built-in power switches in the shape of two coupled H-bridge topologies. The system features 1:2 and 2:3 operation modes as well as a 1:1 operation where the input is directly connected to the output. This feedthrough mode is suitable for input voltages higher than the output voltage. In 2:3 operation mode two flying capacitors are placed in series and each capacitor is charged to a half of the input voltage. In pumping phase the flying capacitors are placed in parallel. The bottom-plates of the parallel flying capacitors CFLY1 and CFLY2 are then connected to the input voltage so that the voltage at the top-plates of the flying capacitors is boosted to a voltage equal to VBATT + VBATT/2. By connecting the topplates of the capacitors to the output, the output voltage in 2:3 mode can be up to one and a half of VBATT. If the top-plate voltage is higher than 5V, the regulation loop adapts the power transistor's current drive capability to drop some voltage. The 2:3 operation mode runs in single-phase operation only. Figure 27. 2:3 Operating Mode Charging Phase Pumping Phase VOUT VOUT SW1 SW1 SW2 SW2 CFLY1 VBATT CFLY2 VBATT CFLY1 CFLY2 SW3 SW3 SW4 SW4 In 1:2 operation mode just one of both flying capacitors is placed in series to the input voltage, and therefore charged to the input voltage. During pumping phase the input voltage is connected to the bottom-plate of the discharged flying capacitor CFLY. The voltage at the top-plate of the capacitor is now boosted to 2VBATT. By connecting the top-plate of the capacitor to the output, the output can be charged to twice the voltage of VBATT. If the top-plate voltage is higher than 5V the regulation loop limits the charge transfer to the output. In collaboration with the second flying capacitor this mode features dual-phase operation. Figure 28. 1:2 Operating Mode Charging Phase Pumping Phase VOUT VOUT SW1 SW1 SW2 VBATT SW2 CFLY1 CFLY2 VBATT CFLY1 CFLY2 SW3 SW3 SW4 www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 SW4 Revision 1.05 10 - 16 AS1301 Datasheet - D e t a i l e d D e s c r i p t i o n 8.3 Overload Protection When the output voltage drops significantly below battery voltage due to a very high load the AS1301 enters into an overload protection condition. In this condition the output is connected to the input via a current limiting connection. Once the overload is removed, the device enters soft-start period and ramps up to the nominal output voltage. 8.4 Undervoltage Lockout, UVLO The AS1301 is equipped with undervoltage lockout functionality. If the battery voltage drops below 2.7V (typ) the device enters the undervoltage lockout condition. The device remains in this condition until the battery voltage is high enough to enter the soft-start period. An internal hysteresis of 100mV will prevent ringing during startup. If the input voltage climbs back to 2.8V (typ) after such a condition, the device turns-on automatically. 8.5 Shutdown Mode The AS1301 enters low-power shutdown mode when EN is set to logic low. In shutdown the charge-pump action is halted, the output is completely disconnected from the input and VOUT will drop to 0V. During shutdown the output is set to a high-Z condition. So it can be forced higher voltage then the input, because the permanent monitoring of the input- and output voltage will prevent an erroneous current form the output back to the input during shutdown. Note: For a stable operation trigger at least a rising edge on the EN pin to set the internal settings of the device after VBATT power-up. 8.6 Thermal Shutdown The AS1301 offers thermal shutdown, which prevents eventual damage due to an over-temperature condition. Thermal shutdown will be initiated if the junction temperature exceeds 145C. If the temperature drops below this value, the thermal shutdown will be released automatically and the device will resume operation. www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Revision 1.05 11 - 16 AS1301 Datasheet - A p p l i c a t i o n I n f o r m a t i o n 9 Application Information 9.1 External Component Selection The high internal oscillator frequency of 1MHz permits the use of small capacitors for both, the flying capacitors and the output capacitors. For any given load value of the flying- and output capacitors as well as their ESR are affecting the output voltage performance. In general, the capacitor's ESR is inversely proportional to its physical size. Larger capacitances and higher voltage ratings tend to reduce ESR. The ESR is a function of the frequency too, so it must be rated at the devices operating frequency. Another factor affecting capacitor ESR is temperature. Note: Many capacitors have a huge capacity variation over temperature. This can be compensated by choosing a capacitor with a better thermal coefficient or by choosing a larger nominal value to ensure proper operation over temperature. 9.2 Input and Output Capacitor Selection It is not critical which type of input bypass capacitor CBAT and output filter capacitor COUT is used, but it will affect the performance of the charge pump. Low ESR capacitors should be used to minimize VOUT ripple. Multi-layer ceramic capacitors are recommended since they have extremely low ESR and are available in small footprints. Input Capacitor. An 2.2F input bypass low ESR capacitor such as tantalum or ceramic is recommended to reduce noise and supply transients. During startup and mode change it supplies part of the peak input current drawn by the device. Output Capacitor. The output capacitor is charged to the VOUT voltage during pumping phase. The ESR of the output capacitor introduces steps in the output voltage waveform whenever the charge pump charges COUT. These steps contribute to the ripple voltage of VOUT. Therefore, ceramic or tantalum low ESR capacitors are recommended for COUT to minimize the output voltage ripple. Table 4. Recommended Input and Output Capacitor Part Number C TC Code Rated Voltage Dimensions (L/W/T) GRM21BR71A225KA01 2.2F X7R 10V 2x1.2x1.35mm Manufacturer Murata www.murata.com 9.3 Flying Capacitor Selection To ensure the required output current and avoid high peak currents the values of the flying capacitors CFLY1 and CFLY2 are very critical. A 220nF capacitor is sufficient for most applications. Dependent on the operation mode the AS1301 alternately charges and discharges CFLY1/2. Since the flying capacitors lead a higher current than the output capacitor the ESR of CFLY1/2 has a greater impact on the performance of the whole system. The voltage drop caused by the ESR of the flying capacitors directly adds to the output source resistance of the charge pump. Therefore low ESR capacitors, e.g. tantalum or ceramic, are recommended for the flying capacitors as well. Table 5. Recommended Flying Capacitor Part Number C TC Code Rated Voltage Dimensions (L/W/T) GRM188R71E224KA88 220nF X7R 25V 1.6x0.8x0.87mm www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Revision 1.05 Manufacturer Murata www.murata.com 12 - 16 AS1301 Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 10 Package Drawings and Markings The device is available in a TDFN (3x3x0.8mm) 10-pin and WL-CSP 8-bumps package. Figure 29. TDFN (3x3x0.8mm) 10-pin Package Drawings and Dimensions D2 SEE DETAIL B A D D2/2 B 2x E E2 E2/2 NX L aaa C PIN 1 INDEX AREA (D/2 xE/2) 4 NX K PIN 1 INDEX AREA (D/2 xE/2) 4 aaa C N N-1 10 2x NX b e TOP VIEW 6 e (ND-1) X e ddd bbb C 5 C A B BTM VIEW 5 Terminal Tip A3 ccc C A C SEATING PLANE A1 10 NX 0.08 C SIDE VIEW Datum A or B ODD TERMINAL SIDE Symbol A A1 A3 L1 L2 aaa bbb ccc ddd eee ggg Min 0.70 0.00 Typ 0.75 0.02 0.20 REF 0.03 Max 0.80 0.05 0.15 0.13 Symbol D BSC E BSC D2 E2 L 0.15 0.10 0.10 0.05 0.08 0.10 k b e N ND Min 2.20 1.40 0.30 0 0.20 0.18 Typ 3.00 3.00 0.40 0.25 0.50 10 5 Max 2.70 1.75 0.50 0.30 Notes: 1. All dimensions are in millimeters, angle are in degrees. 2. N is the total number of terminals. www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Revision 1.05 13 - 16 AS1301 Datasheet - P a c k a g e D r a w i n g s a n d M a r k i n g s 40m Bottom view Ball side Top through view Seating plane Figure 30. WL-CSP 8-bumps Package Diagram 40 typ. 0 500 1 311 500 1970 500 500 970 250 typ. 31010 60030 Notes: ccc Coplanarity All dimensions in m www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Revision 1.05 14 - 16 AS1301 Datasheet - O r d e r i n g I n f o r m a t i o n 11 Ordering Information The device is available as the standard products shown in Table 6. Table 6. Ordering Information Ordering Code Marking Description Delivery Form Package AS1301A-BWLT ASO4 5V/50mA Low Noise Inductorless Boost Converter T&R WL-CSP 8-bumps AS1301A-BTDT ASO4 5V/50mA Low Noise Inductorless Boost Converter T&R TDFN (3x3x0.8mm) 10-pin Note: All products are RoHS compliant. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect Technical Support is found at http://www.austriamicrosystems.com/Technical-Support For further information and requests, please contact us mailto:sales@austriamicrosystems.com or find your local distributor at http://www.austriamicrosystems.com/distributor Design the AS1301 online at http://www.austriamicrosystems.com/analogbench analogbench is a powerful design and simulation support tool that operates in on-line and off-line mode to evaluate performance and generate application-specific bill-of-materials for austriamicrosystems' power management devices. www.austriamicrosystems.com/DC-DC_Step-Up/AS1301 Revision 1.05 15 - 16 AS1301 Datasheet Copyrights Copyright (c) 1997-2010, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered (R). 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. Disclaimer Devices sold by austriamicrosystems AG are covered by the warranty and patent indemnification provisions appearing in its Term of Sale. austriamicrosystems AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein or regarding the freedom of the described devices from patent infringement. austriamicrosystems AG reserves the right to change specifications and prices at any time and without notice. Therefore, prior to designing this product into a system, it is necessary to check with austriamicrosystems AG for current information. This product is intended for use in normal commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by austriamicrosystems AG for each application. For shipments of less than 100 parts the manufacturing flow might show deviations from the standard production flow, such as test flow or test location. The information furnished here by austriamicrosystems AG is believed to be correct and accurate. However, austriamicrosystems AG shall not be liable to recipient or any third party for any damages, including but not limited to personal injury, property damage, loss of profits, loss of use, interruption of business or indirect, special, incidental or consequential damages, of any kind, in connection with or arising out of the furnishing, performance or use of the technical data herein. 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_Step-Up/AS1301 Revision 1.05 16 - 16