AS1334 austriamicrosystems AG, AS1334 Datasheet
AS1334
Related parts for AS1334
AS1334 Summary of contents
Page 1
... Li-Ion battery. The device also achieves high-performance in mobile phones and other applications requiring low dropout voltage. The AS1334 operates from an input voltage range of 2.7 to 5.5V while providing output voltages of 1.2, 1.5, 1.8, 2.5, 3.0 and 3.3V. Fixed-frequency PWM operation minimizes RF interference. Shutdown function turns the device off and reduces battery consumption to 0.01µ ...
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... Power Supply Voltage. Input to the internal PFET switch. Switch Pin. Switch node connection to the internal PFET switch and NFET synchronous rectifier. Connect to an inductor with a saturation current rating that exceeds the maximum switch peak current limit specification of the AS1334. Power Ground. Revision 1.04 www.DataSheet4U.com ...
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... AS1334 Datasheet - Absolute Maximum Ratings Stresses beyond those listed in Table 2 and functional operation of the device at these or any other conditions beyond those indicated in Characteristics on page 4 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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... AS1334 Datasheet - Electrical Characteristics -40ºC to +85º VDD = EN = 3.6V, unless otherwise noted. Typ. values are Table 3. Electrical Characteristics Symbol Parameter V Output Voltage OUT I Shutdown supply current ...
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... AS1334 Datasheet - Table 4. System Characteristics Symbol Parameter Line_tr Line transient response Load transient response Load_tr 1. Ripple voltage should measured at C gested inductors and capacitors. www.austriamicrosystems.com Conditions V = 600mV perturbance, over Vin IN range 3.4V to 5.5V ...
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... AS1334 Datasheet - Typical Operating Characteristics Circuit in Figure 23 on page 11 VDD = EN = 3.6V 3.3µH (LPS4018-332ML_), CIN = COUT = 10µF IN (GRM21BR61C106KA01) unless otherwise noted; Figure 3. Quiescent Current vs 0.55 0.5 0.45 0.4 0.35 2 ...
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... AS1334 Datasheet - Figure 7. Output Voltage vs. Temperature 3.06 3.04 3.02 3 2.98 2.96 2.94 -40 - Temperature (°C) Figure 9. Switch Peak Current Limit vs. Temperature; closed loop 1.2 1.15 1.1 1.05 1 -40 - Temperature (°C) Figure 11. Startup 3.6V 3.0V, IN OUT I < ...
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... AS1334 Datasheet - Figure 13. Shutdown Response; V =3.6V =3.0V, R =5Ω OUT LOAD 50µs/Div Figure 15. Line Transient Response; V 3.9V, I =100mA, V =3.0V OUT OUT 50µs/Div Figure 17. Output Voltage Ripple; ...
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... AS1334 Datasheet - Figure 19. R (P-Chanel) vs. Temp.; I DSON 350 300 250 200 150 100 50 0 -40 - Temperature (°C) Figure 21. EN High Threshold vs 1.2 1.15 1.1 1.05 1 0.95 0.9 0.85 0.8 2.5 3 3.5 4 4.5 Supply Voltage (V) www ...
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... Datasheet - Detailed Description The AS1334 is a simple, step-down DC-DC converter optimized for powering portable applications that require low dropout voltages such as mobile phones, portable communicators, and similar battery powered RFID devices. Besides ...
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... ON/OFF Operating the AS1334 AS1334’s control block turns on the internal PFET (P-channel MOSFET) switch during the first part of each switching cycle, thus allowing current to flow from the input through the inductor to the output filter capacitor and load. The inductor limits the current to a ramp with a slope of around (V During the second part of each cycle, the controller turns the PFET switch off, blocking current flow from the input, and then turns the NFET (N-channel MOSFET) synchronous rectifier on result, the inductor’ ...
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... POK output sinks current. Shutdown Mode set to high (>1.2V) the AS1334 is in normal operation mode. During power-up and when the power supply is less than 2.7V minimum operating voltage, the chip should be turned off by setting EN low. In shutdown mode the following blocks of the AS1334 are turned off, PFET switch, NFET synchronous rectifier, reference voltage source, control and bias circuitry ...
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... EN pin. Set EN high (>1.2V) for normal operation and low (<0.5V) for a 0.01µA (typ.) shutdown mode. Set EN low to turn off the AS1334 during power-up and under voltage conditions when the power supply is less than the 2.7V minimum operating voltage. The part is out of regulation when the input voltage is less than 2.7V. ...
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... During the second half cycle, the PMOS turns off and the internal NMOS turns on. The inductor current continues to flow via the inductor from the device PGND line to the output capacitor (C2). Referring to AS1334 has two major current loops where pulse and ripple current flow. The loop shown in the left hand side is most important, because pulse current shown in waveform in this path is triangular, as shown in fast di/dt ...
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... AS1334 Datasheet - Package Drawings and Markings The devices are available in a TDFN(3x3) 8-pin package. Figure 25. TDFN(3x3) 8-pin Package D PIN 1 INDEX AREA aaa C 2x (D/2 xE/2) TOP VIEW e Terminal Tip DETAIL B ...
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... Marking Output AS1334-BTDT-12 ASR2 1.2V AS1334-BTDT-15 ASR3 1.5V AS1334-BTDT-18 ASR4 1.8V AS1334-BTDT-25 ASR5 2.5V AS1334-BTDT-30 ASQY 3.0V AS1334-BTDT-33 ASR6 3.3V 1 xxxx xxxx AS1334-BTDT-xx 1. Non-standard devices are available between 1.2V and 3.4V in 100mV steps. For more information and inquiries contact http://www.austriamicrosystems.com/contact Note: All products are RoHS compliant and Pb-free. ...
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... AS1334 Datasheet Copyrights Copyright © 1997-2009, austriamicrosystems AG, Tobelbaderstrasse 30, 8141 Unterpremstaetten, 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. ...