AS1324-AD EB austriamicrosystems, AS1324-AD EB Datasheet
AS1324-AD EB
Specifications of AS1324-AD EB
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AS1324-AD EB Summary of contents
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... AS1324 perfect for any single Li-Ion battery-powered application. Typical supply current with no load is 30µA and decreases to ≤1µA in shutdown mode. The AS1324 is available as the standard versions listed in Table 1. Standard Versions Model AS1324-AD ...
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... Output Voltage Feedback Pin. An internal resistor divider steps the output voltage down for V OUT comparison to the internal reference voltage. (Fixed voltage variants only.) www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 EN 5 VFB 1 AS1324-12/ AS1324-15/ GND 2 AS1324-18 4 VIN SW 3 Description Revision 1.05 5 VOUT 4 VIN ...
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... Table 3. Absolute Maximum Ratings Parameter VIN to GND SW, EN GND Thermal Resistance Θ JA ESD Latch-Up Operating Temperature Range Storage Temperature Range Package Body Temperature Junction Temperature www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 Section 6 Electrical Characteristics on page 4 Min Max Units -0 -0 0.3 207.4 º ...
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... I = 0mA +25ºC OUT AMB Shutdown Mode 0V +25ºC EN AMB AS1324 100mA OUT V = 2. +25ºC AMB 2 AS1324-AD 100mA OUT AS1324-12 100mA OUT AS1324-15 100mA OUT AS1324-18 100mA OUT V = 2 100mA OUT OUT AMB 25º 100mA LSW I = -100mA LSW ...
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... Figure 5. Efficiency vs. Output Current; V OUT 100 100 Output Current (mA) Figure 7. Efficiency vs. Output Current; V OUT 100 100 Output Current (mA) www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 Figure 4. Efficiency vs. Output Current; V 100 IOUT = 600mA 60 IOUT = 100mA IOUT = 10mA 55 IOUT = 1mA 50 4.7 5.1 5 1.5V Figure 6. Efficiency vs. Output Current; V 100 VIN = 2.5V 60 VIN = 2.7V VIN = 3 ...
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... Figure 13 1.2V OUT OUT OUTNOM 1.3 1.25 1.2 1.15 1.1 0 100 200 300 400 Output Current (mA) www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 Figure 10. Switching Frequency vs. Temperature 1.6 1.55 1.5 1.45 1.4 4.7 5.1 5.5 -45 -30 -15 Figure 12. Output Voltage vs. Input Voltage 2 1.95 1.9 1.85 1.8 1.75 1 ...
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... Datasheet - Figure 15. Quiescent Current vs. Input Voltage 2.7 3.1 3.5 3.9 4.3 Input Voltage (V) Figure 17. Load Step 0mA to 600mA 500µs/DIV Figure 19. Startup 1ms/DIV www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 Figure 16. Quiescent Current vs. Temperature 4.7 5.1 5.5 -45 -30 -15 Figure 18. Load Step 10mA to 200mA Figure 20. Powersave Mode Revision 1. ...
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... AS1324 Datasheet - Detailed Description The AS1324 is a high-efficiency buck converter that uses a constant-frequency current-mode architecture. The device contains two internal MOSFET switches and is available in adjustable- and fixed-output voltage versions. Figure 21. AS1324 - Block Diagram Compensator OSC OSCN Frequency Shift 0.6V OUT 0.6V + Δ ...
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... Shutdown Connecting EN to GND or logic low places the AS1324 in shutdown mode and reduces the supply current to 0.1µA. In shutdown the control circuitry and the internal NMOS and PMOS turn off and SW becomes high impedance disconnecting the input from the output. The output capacitance and load current determine the voltage decay rate ...
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... Datasheet - Application Information The AS1324 is perfect for mobile communications equipment like cell phones and smart phones, digital cameras and camcorders, portable MP3 and DVD players, PDA’s and palmtop computers and any other handheld instruments. Figure 22. Single Li-Ion 1.2V/600mA Regulator for High-Efficiency ...
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... The losses in the core material (magnetic hysteresis loss, especially at high switching frequencies) 2. Additional losses in the conductor from the skin effect (current displacement at high frequencies) 3. Magnetic field losses of the neighboring windings (proximity effect) 4. Radiation losses www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 4.7µ AS1324- OUT GND OUT Equation (EQ 3) ...
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... Higher value, low cost ceramic capacitors are available in very small case sizes, and their high ripple current, high voltage rating, and low ESR make them ideal for switching regulator applications. Because the AS1324 control loop is not dependant on the output capacitor ESR for stable operation, ceramic capacitors can be used to achieve very low output ripple and accommodate small circuit size ...
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... Because ceramic capacitors lose a lot of their initial capacitance at their maximum rated voltage recommended that either a higher input capacity or a capacitance with a higher rated voltage is used. 9.5 Feedback Resistor Selection In the AS1324-AD, the output voltage is set by an external resistor divider connected to V voltage sensing and adjustment. Figure 27. Setting the AS1324 Output Voltage ...
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... As soon as the junction temperature reaches approximately 150ºC the AS1324 goes in thermal shutdown. In this mode the internal PMOS & NMOS switch are turned off. The device will power up again, as soon as the temperature falls below +145°C again. ...
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... AS1324 Datasheet - 9.9 Design Example Figure 28 shows the AS1324 used in a single lithium-ion (3.7V typ) battery-powered mobile phone application. The load current requirement is 600mA (max) but most of the time the device will require only 2mA (standby mode current). Figure 28. Design Example ...
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... AS1324 Datasheet - 9.10 Layout Considerations The AS1324 requires proper layout and design techniques for optimum performance. The power traces (GND, SW, and V ) should be kept as short, direct, and wide as is practical Pin V (AS1324 only) should be connected directly to the feedback resistors ( should be avoided to minimize the output voltage ripple and to maintain the stability of the regulator. ...
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... AS1324 Datasheet - Figure 31. AS1324-18 Basic PCB Layout V OUT Figure 32. AS1324-18 Basic Diagram V OUT www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 Via AS1324- OUT IN GND VOUT AS1324-18 2 GND C OUT VIN Revision 1.05 Via to V OUT High Current Path ...
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... The package top can be smaller than the package bottom. Dimensions D and E1 are determined at the outermost extremes of the plastic body exclusive of mold flash, tie bar burrs, gate burrs, and interlead flash, but include any mismatches between the top of the package body and the bottom. D and E1 are determined at datum H. www.austriamicrosystems.com/DC-DC_Step-Down/AS1324 Max Notes Symbol 1 ...
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... For further information and requests, please contact us or find your local distributor at http://www.austriamicrosystems.com/distributor Design the AS1324 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. ...
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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_Step-Down/AS1324 Revision 1. ...