as1339 austriamicrosystems, as1339 Datasheet
as1339
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as1339 Summary of contents
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... The AS1339 supports fast switching using small ceramic 10μF input and 4.7µF output capacitors to maintain low ripple voltage. The AS1339 uses an analog input driven by an external DAC to control the output voltage linearly for continuous PA power adjustment. The gain from REFIN to OUT is 2 ...
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... AS1339 Datasheet - Pinout Figure 2. Pin Assignments (Top View) Pin Description Table 1. Pin Description Pin Name Pin Number NC A1 AGND A2 REFIN A3 PGND A4 LDO2 B1 PA_EN B2 EN2 www.austriamicrosystems.com NC AGND REFIN PGND PA_EN LDO2 EN2 IN2 TEST ...
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... AS1339 Datasheet - Table 1. Pin Description Pin Name Pin Number IN2 C1 TEST C2 IN1B, IN1A C3, C4 LDO1 D1 EN1 D2 PAB, PAA D3, D4 www.austriamicrosystems.com Description Supply Voltage Input for LDO1 and LDO2. Connect IN2 to a battery or supply voltage from 2.7V to 5.5V. Decouple IN2 with a 1μF ceramic capacitor as close as possible to IN2 and AGND ...
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... AS1339 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 istics on page 5 is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability ...
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... AS1339 Datasheet - Electrical Characteristics IN1A IN1B IN2 PA_EN EN1 otherwise specified), for external components refer to Table 3. Electrical Characteristics Symbol Parameter Input Supply V Input Voltage Range IN I Shutdown Supply Current ...
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... AS1339 Datasheet - Table 3. Electrical Characteristics (Continued) Symbol Parameter BYPASS Bypass Activation Factor On-Resistance Bypass PFET PFET Bypass Off-Leakage Current LDO1/2 Output Voltage Quiescent Current Output Current Current Limit 3 Dropout Voltage ...
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... AS1339 Datasheet - Table 4. System Characteristics (Continued) Symbol Parameter Start-Up Time Regulation Time; Rise Time Regulation Time; Fall Time LDO Start-Up Time Shut-Down Time 4 Line Regulation Load Regulation 5 Ripple Rejection ...
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... AS1339 Datasheet - Typical Operation Characteristics Figure 3. DC-DC Efficiency vs OUT 100 95 90 Bypass Mode 0.6 1 1.4 1.8 2.2 2.6 Output Voltage (V) Figure 5. DC-DC Efficiency vs OUT 100 95 90 Bypass Mode ...
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... AS1339 Datasheet - Figure 9. DC-DC Efficiency vs OUT 100 100 Output Current (mA) Figure 11. DC-DC Efficiency vs OUT 100 100 Output Current (mA) Figure 13 ...
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... AS1339 Datasheet - Figure 15. DC-DC Load Regulation, V OUT V = 1.8V OUT 1.83 1.82 1.81 1.80 1.79 Vin = 2.7V 1.78 Vin = 3.3V Vin = 3.9V 1. 100 Output Current (mA) Figure 17. DC-DC Efficiency 100 95 Bypass PWM Mode Mode 90 Iout = 300mA 85 Iout = 400mA ...
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... AS1339 Datasheet - Figure 21. DC-DC Efficiency vs Input Voltage 1.0V OUT 100 2.7 3.05 3.4 3.75 4.1 4.45 4.8 5.15 5.5 Input Voltage (V) Figure 23. DC-DC Line Regulation, V OUT V = 3.4V OUT 4.5 4 3.5 Bypass PWM 3 Mode Mode 2.5 2 2.7 3.05 3.4 3.75 4.1 4.45 4.8 5.15 5.5 Input Voltage (V) Figure 25. DC-DC Line Regulation, V ...
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... AS1339 Datasheet - Figure 27. DC-DC Output Voltage Error vs. Reference Voltage 0.25 0.5 0.75 1 Reference Voltage (V) Figure 29. DC-DC No-Load Supply Current vs Vout = 3.4V 5 Bypass PWM Mode Mode ...
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... AS1339 Datasheet - Figure 33. DC-DC Soft-Start 7.5 LOAD 20µs/Div Figure 35. DC-DC Sine Wave Output in PWM Mode; Ω 4.5V 7.5 IN LOAD 200µs/Div Figure 37. DC-DC Rectangular Wave Output in PWM Mode 4.5V 7.5 ...
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... AS1339 Datasheet - Figure 39. DC-DC Line Transient 4.0V to 3.5V, IN Ω 1.2V OUT LOAD 50µs/Div Figure 41. LDO Quiescent Current vs Input Voltage (V) Figure 43. LDO PSRR vs. Freq ...
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... AS1339 Datasheet - Figure 45. LDO Turn ON / OFF Response load 50µs/Div Figure 47. LDO Line Transient 5.5V to 3.5V 10mA OUT 50µs/Div www.austriamicrosystems.com = 3.6V, Figure 46. LDO Load Transient; I ...
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... Datasheet - Detailed Description The AS1339 is designed to dynamically power the PA in WCDMA and NCDMA handsets. The device is empowered with a high-frequency, high-efficiency step-down converter, and two LDOs. The step-down converters are capable of delivering 650mA. The PWM control scheme provides fast transient response, while 2MHz switching frequency allows the trade-off between efficiency and small external components. A 110m Ω ...
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... To place LDO1 or LDO2 in shutdown mode, connect EN1 or EN2 to GND or disconnect EN1 or EN2 (NC => logic-low). The outputs of the LDOs are pulled to ground through an internal 100 Ω resistor during shutdown. When the PA step- down and LDOs are all in shutdown, the AS1339 enters a very low power state, where the input current drops to 0.8μA (typ). ...
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... AS1339 Datasheet - Application Information The AS1339 is designed to supply power amplifiers for RF applications. The output power of the PA can directly be controlled via the output voltage of the AS1339. Figure 50. Typical Application Diagram Li+ Battery ...
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... AS1339 Datasheet - Capacitor Selection for LDO’s Input Capacitor The capacitor for the LDO Input should have at least a value of the sum of the output capacitors of LDO1 and LDO2. With a larger input capacitance and lower ESR a better noise rejection and line transient response can be achieved. ...
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... AS1339 Datasheet - .... Switching Frequency (2.0MHz typical) L .... Inductor Value I .... Maximum Inductor current LMAX Δ I .... Peak to Peak inductor ripple current L I .... Applied load current OUTMAX Accepting larger values of ripple current allows the use of low inductance values, but results in higher output voltage ripple, greater core losses, and lower output current capability ...
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... AS1339 Datasheet - Figure 52. Efficiency Comparison of different Inductors 3.9V OUT 100 100 Output Current (mA) Example The following system should be designed supply with a Lithium-Ion Battery = 4. 3.0V OUT 500mA ...
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... AS1339 Datasheet - Package Drawings and Markings The devices are available in a 16-pin WLP (2x2mm) package. Figure 54. 16-pin WLP (2x2mm) Package 2015±20 www.austriamicrosystems.com 257.5±20 Revision 1. ...
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... Datasheet - Ordering Information The devices are available as the standard products shown in Table 9. Ordering Information Part Number Marking 650mA RF Step-Down DC-DC for PA, AS1339-BWLT AS1339 All devices are RoHS compliant and free of halogene substances. www.austriamicrosystems.com Table 9. Description Delivery Form Tape and Reel with two LDOs Revision 1 ...
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... AS1339 Datasheet Copyrights Copyright © 1997-2009, austriamicrosystems AG, Schloss Premstaetten, 8141 Unterpremstaetten, Austria-Europe. Trademarks Registered ®. All rights reserved. The material herein may not be reproduced, adapted, merged, trans- lated, 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. ...