Preliminary Datasheet AS1355 3 0 0 m A , Tr i p l e L D O 1 General Description 2 Key Features The AS1355 is a high-performance triple CMOS lowdropout voltage regulator in a single QFN package. The efficient set of programmable power supplies is optimized to deliver the best compromise between quiescent current and regulator performance for mobile phones, PDAs, MP3 players, and other battery powered devices. ! 3 Independent Voltage Regulators with Shutdown ! Output Current: 300mA each LDO ! Programmable Output Voltage Range: 1.25V to 3.6V in 50mV Steps ! Accuracy: ±1.0% ! PSRR: 70dB at 1kHz, 60dB at 100kHz Stability is guaranteed with ceramic output capacitors of only 1µF (±20% – X5R) up to 4.7µF (±20% – X5R). The low equivalent series resistance (ESR) of these capacitors ensures low output impedance at high frequencies. ! Line Regulation: ±2mV ! Load Regulation: ±0.6mV ! Supply Range: 2.3V to 5.5V ! 0.1V Dropout Voltage @ Iload = 200mA ! Shutdown Current: ≤1µA ! Supply Current Without Load: 160µA (typ) ! Softstart for Low Inrush Current ! Stable with low ESR Ceramic Capacitors from 1µF to 4.7µF ! Low Noise: 40µV rms @10Hz to 100kHz Bandwidth ! Thermal Protection ! Over-Current Protection ! Temperature Range: -40°C to +85°C ! 16-pin QFN 3x3 Package Regulation performance is excellent even under low dropout conditions, when the power transistor has to operate in linear mode. The low-noise performance allows direct connection of noise sensitive circuits without additional filtering networks. The AS1355 is available in a 16-pin QFN 3x3 package. 3 Applications The AS1355 is ideal for cordless and mobile phones, MP3 players, CD and DVD players, PDAs, hand-held computers, digital cameras, and any other hand-held battery-powered device. Figure 1. AS1355 - Typical Application Diagram +5V VDD1 VOUT1 3.3V 1µF VDD2 VOUT2 1µF 1µF VOUT3 VDD3 AS1355 1.5V 1µF REF VDDA CREF = 100nF (Improved Noise Performance) EN1 µP 1.8V EN2 GND EN3 www.austriamicrosystems.com Revision 0.08 1 - 11 AS1355 Preliminary Datasheet - P i n o u t 4 Pinout Pin Assignments Figure 2. Pin Assignments (Top View) EN1 1 VDDA 2 VDD1 3 VDD2 4 EN2 EN3 NC REF 16 15 14 13 12 GND 11 GND AS1355 10 NC 17 9 6 5 7 VOUT1 VOUT2 VOUT3 VDD3 8 NC Pin Descriptions Table 1. Pin Descriptions Pin Number Pin Name Description 1 EN1 Active-High Enabel Input 1. Pull this pin to low to disable the regulated output voltage VOUT1. 2 VDDA Analog Power Supply Voltage 3 VDD1 Unregulated Input Voltage 1 4 VDD2 Unregulated Input Voltage 2 5 VOUT1 Regulated Output Voltage 1 6 VOUT2 Regulated Output Voltage 2 7 VOUT3 Regulated Output Voltage 3 Not Connected 8 NC 9 VDD3 10 NC 11, 12 GND Ground. Note: All GND pins must be connected together externally. 13 REF Reference Voltage. Note: Connect to a 100nF capacitor during normal operation. 14 NC Not Connected 15 EN3 Active-High Enabel Input 3. Pull this pin to low to disable the regulated output voltage VOUT3. 16 EN2 Active-High Enabel Input 2. Pull this pin to low to disable the regulated output voltage VOUT2. 17 NC Exposed Pad. This pad is not connected internally, it can be connected to GND. www.austriamicrosystems.com Unregulated Input Voltage 3 Not Connected Revision 0.08 2 - 11 AS1355 Preliminary 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 the operational sections of the specifications 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 ENx, VDDx to GND -0.3 7 V VOUTx to GND -0.3 5 V Any other pin to GND -0.3 VDD + 0.3 V 33 ºC/W on PCB 260 °C The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020D “Moisture/Reflow Sensitivity Classification for non-hermetic Solid State Surface Mount Devices”. Thermal Resistance ΘJA Package-Body Peak Temperature Operating Temperature -40 85 °C Storage Temperature -65 150 °C Electrostatic Discharge Protection (ESD) Level www.austriamicrosystems.com 2 kV Revision 0.08 Comments HBM – Norm: MIL 883 E method 3015. 3 - 11 AS1355 Preliminary 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 VDD = 4V, COUT = 1µF, TAMB = -40°C to +85°C (Typ values are for TAMB = 25°C), unless otherwise specified; Table 3. Electrical Characteristics Symbol Parameter VDD Supply Voltage Range VOUT Output Voltage Range RON On Resistance PSRR 1 Power Supply Rejection Ratio f = 1kHz, CREF = 100nF 70 f = 100kHz, CREF = 100nF 60 IOFF Shut Down Current ENx = Low, TAMB = +25°C IVDD Supply Current Without Load tset 1 Output Voltage Settling Time tstart 1 Start-up Time 2 VOUT Output Voltage Tolerance VLINEREG Line Regulation, Static VLOADREG Load Regulation, Static VIH Enable Input Voltage High VIL Enable Input Voltage Low ILOAD Output Current ILIMIT Output Current Limitation VNoise Output Noise Voltage Conditions Min Typ Max Unit 2.3 5.5 V 1.25 3.6 V 1 Ω 0.5 dB 1 µA 240 µA ILOAD Switched from 0 to 100mA 50 µs CREF = 100nF Pre-charged 300 µs 160 CREF = 0nF Uncharged 200 µs CREF = 100nF Uncharged 15 ms ILOAD = 0mA, TAMB = 25°C -1 1 % ILOAD = 0 to 300mA -2 2 % VOUT(NOM)+0.3V to 5.5V -1 1 % ILOAD = 0 to 50 mA 0.5 2.5 mV 1 ILOAD = 0 to 300 mA 3 10 mV 1 1.5 V 0 10Hz to 100kHz, CREF = 100nF Thermal Protection 0.4 V 300 mA 450 mA 40 µVRMS 150 °C 1. Guaranteed by design and verified by lab evaluation. 2. Startup is performed if any EN pin goes high. 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 Revision 0.08 4 - 11 AS1355 Preliminary 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 VDD = 4V, VOUT = 3.3V, COUT = 1µF, TAMB = +25°C (unless otherwise specified); Figure 3. Load Regulation; VOUT vs. IOUT Figure 4. Line Regulation; VOUT vs. VIN 1.84 3.36 1.83 Output Voltage (V) 3.32 3.3 3.28 3.26 1.82 1.81 1.8 1.79 1.78 1.77 3.24 1.76 50 100 150 200 250 2 300 2.5 Output Current (mA) 4 4.5 5 5.5 75 90 Figure 6. Quiescent Current vs. Temperature 240 3.36 220 Quiescent Current (µA) 3.34 Output Voltage (V) 3.5 Input Voltage (V) Figure 5. Output Voltage vs. Temp.; IOUT = 1mA 3.32 3.3 3.28 3.26 3.24 -45 -30 -15 3 200 180 160 140 120 100 0 15 30 45 60 75 80 -45 -30 -15 90 Temperature (°C) 1V/Div VDD VOUT VDD VOUT 15 30 45 60 Figure 8. Startup; RLOAD = 11Ω, no CREF 2V/Div Figure 7. Startup; no Load, no CREF 50µs/Div www.austriamicrosystems.com 0 Temperature (°C) 2V/Div 0 1V/Div Output Voltage (V) 3.34 50µs/Div Revision 0.08 5 - 11 AS1355 Preliminary 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 2ms/Div 20µs/Div 20mV/Div VOUT IOUT 10µs/Div 100mA/Div 20mV/Div Figure 14. Load Transient Response; IOUT = 300 to 0mA 100mA/Div VOUT Figure 13. Load Transient Response; IOUT = 0 to 300mA IOUT 2V/Div EN VOUT 20µs/Div 1V/Div 2V/Div Figure 12. Startup; RLOAD = 11Ω, CREF = 100nF (precharged) 1V/Div VOUT EN Figure 11. Startup; no Load, CREF = 100nF (precharged) www.austriamicrosystems.com 2V/Div VDD VOUT 2ms/Div 1V/Div 2V/Div Figure 10. Startup; RLOAD = 11Ω, CREF = 100nF 1V/Div VOUT VDD Figure 9. Startup; no Load, CREF = 100nF 500µs/Div Revision 0.08 6 - 11 AS1355 Preliminary Datasheet - D e t a i l e d D e s c r i p t i o n 8 Detailed Description Figure 15. AS1355 - Block Diagram VDD1 VOUT1 Thermal Protection Overcurrent Protection Softstart VREF EN1 Control VDD2 VOUT2 Thermal Protection Overcurrent Protection Softstart VREF EN2 Control VDD3 VOUT3 Thermal Protection Overcurrent Protection Softstart VREF EN3 Control Reference Voltage VDDA AS1355 www.austriamicrosystems.com Revision 0.08 REF GND 7 - 11 AS1355 Preliminary Datasheet - Ty p i c a l A p p l i c a t i o n 9 Typical Application Figure 16. Typical Application +5V VDD1 VOUT1 3.3V 1µF VDD2 VOUT2 1µF 1.8V 1µF VOUT3 VDD3 1.5V 1µF REF VDDA CREF = 100nF (Improved Noise Performance) AS1355 EN1 EN2 GND Microprocessor EN3 www.austriamicrosystems.com Revision 0.08 8 - 11 AS1355 Preliminary 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 AS1355 is available in a 16-pin QFN 3x3 package. Figure 17. 16-pin QFN 3x3 Package 13 14 15 16 12 1 11 2 10 3 9 4 8 7 6 5 m m Symbol A A1 A3 b D E D2 E2 Min 0.80 0.00 0.18 1.80 1.80 Typ 0.85 0.203 REF 0.23 3.00 BSC 3.00 BSC 1.90 1.90 Max 0.90 0.05 0.28 2.00 2.00 Symbol e L L1 aaa bbb ccc ddd eee Min 0.25 0.00 Typ 0.50 BSC 0.30 Max 0.35 0.10 0.10 0.10 0.10 0.05 0.08 Notes: 1. Dimensioning and tolerancing conform to ASME Y14.5m-1994. 2. All dimensions are in millimeters while angle is in degrees (°). 3. Dimension b applies to metallized terminal and is measured between 0.25mm and 0.30mm from the terminal tip. Dimension L1 represents terminal full back from package edge up to 0.1mm is acceptable. 4. Coplanarity applies to the exposed heat slug as well as the terminal. 5. Radius on terminal is oprional. www.austriamicrosystems.com Revision 0.08 9 - 11 AS1355 Preliminary Datasheet - O r d e r i n g I n f o r m a t i o n 11 Ordering Information The devices are available as the standard products shown in Table 4. Table 4. Ordering Information Ordering Code Marking AS1355-BQFT-WGD ASSG Output Description Delivery Form Package 300mA, Triple LDO Tape and Reel 16-pin QFN 3x3 VOUT1 = 3.3V VOUT2 = 1.8V VOUT3 = 1.5V Non-standard devices are available between 1.25V and 3.6V in 50mV steps. For more information and inquiries contact http://www.austriamicrosystems.com/contact Note: All products are RoHS compliant and Pb-free. Buy our products or get free samples online at ICdirect: http://www.austriamicrosystems.com/ICdirect For further information and requests, please contact us mailto:[email protected] or find your local distributor at http://www.austriamicrosystems.com/distributor www.austriamicrosystems.com Revision 0.08 10 - 11 AS1355 Preliminary 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. 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