AS1351 D a ta S he e t Programmable Dual LDO 1 General Description 2 Key Features ! 2 Independent Voltage Regulators with Shutdown ! Output Current: 200mA each LDO ! One Time Programmable Output Voltage (User- or Factory-Trimmed) ! Programmable Output Voltage Range: 1.8 to 3.3V in 0.1V Steps ! Accuracy: ±1.5% ! PSRR: 70dB at 1kHz, 40dB at 100kHz ! Line Regulation: ±2mV ! Load Regulation: ±0.6mV ! Supply Range: 3 to 5.5V ! 0.2V Dropout Voltage @ I = 200mA ! Shutdown Current: ≤1µA ! Supply Current Without Load: 125µA (typ) ! Softstart for Low Inrush Current Regulation performance is excellent even under low dropout conditions, when the power transistor has to operate in linear mode. ! Stable with low ESR Ceramic Capacitors from 1 to 4.7µF ! Low Noise: 40µV rms @10Hz to 100kHz Bandwidth The low-noise performance allows direct connection of noise sensitive circuits without additional filtering networks. ! Thermal Protection ! Over-Current Protection ! Temperature Range: -40 to +85°C ! 12-pin QFN 3x3mm Package The AS1351 is a high-performance dual CMOS lowdropout voltage regulator in a single 3x3mm 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. The one-time-programmable (OTP) function provides greater design flexibility by allowing for independent programming of the output voltage for each regulator onsite. The OTP function allows for fast prototyping reducing development times and costs significant. Factory trimmed versions for full-production are also available. 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. The AS1351 is available in a 12-pin QFN 3x3mm package. 3 Applications The AS1351 is ideal for cordless and mobile phones, MP3 players, CD and DVD players, PDAs, handheld computers, digital cameras, and any other hand-held battery-powered device. Figure 1. Pinout Assignments (Top View) EN2 1 EN1 2 GND 3 N/C N/C REF 12 11 10 AS1351 4 GND www.austriamicrosystems.com 5 6 9 VDD 8 N/C 7 VDD 13 GND (Exposed Pad) VOUT1 VOUT2 Revision 1.21 1 - 10 AS1351 Data Sheet - Pinout 4 Pinout Pin Descriptions Figure 2. Pin Assignments (Top View – Not To Scale) EN2 1 EN1 2 GND 3 N/C N/C REF 12 11 10 AS1351 4 5 GND 6 9 VDD 8 N/C 7 VDD 13 GND (Exposed Pad) VOUT1 VOUT2 Table 1. Pin Descriptions † Number Name Description 1 EN2 Digital input to enable VOUT2. 2 EN1 Digital input to enable VOUT1. 3 GND Negative supply voltage. 4 GND Negative supply voltage. † † 5 VOUT1 Regulated analog output voltage 1. 6 VOUT2 Regulated analog output voltage 2. 7 VDD Positive supply voltage. Pins 7 and 9 must be connected together externally. 8 N/C Not connected. 9 VDD Positive supply voltage. Pins 7 and 9 must be connected together externally. 10 REF Analog reference voltage; connect to 100nF capacitor during normal operation. 11 N/C Not connected. 12 N/C Not connected. 13 GND Negative supply voltage; this pin is the exposed pad. † All GND pins (3, 4, and 13) must be connected together externally. www.austriamicrosystems.com Revision 1.21 2 - 10 AS1351 Data Sheet - Absolute Maximum Ratings 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 VDD to GND -0.3 7 V Any other pin to GND -0.3 VDD + 0.3 V Continuous Power Dissipation QFN12 3x3mm 590 1500 mW Min value measured at TAMB = 85°C; max value measured at TAMB = 25°C. 260 °C The reflow peak soldering temperature (body temperature) specified is in accordance with IPC/JEDEC J-STD-020C “Moisture/Reflow Sensitivity Classification for non-hermetic Solid State Surface Mount Devices”. Package-Body Peak Temperature Operating Ambient Temperature -40 85 °C Storage Temperature -65 150 °C Electrostatic Discharge Protection (ESD) Level 1 www.austriamicrosystems.com kV Revision 1.21 Comments HBM – Norm: MIL 883 E method 3015. 3 - 10 AS1351 Data Sheet - Electrical Characteristics 6 Electrical Characteristics VDD = 4V; TAMB = -40 to +85°C (Typ values are for TAMB = 25°C); CLOAD = 1µF (Ceramic); unless otherwise specified. Table 3. Electrical Characteristics Symbol Parameter Conditions Min Typ Max Unit VDD Supply Voltage Range 3 5.5 V VOUT Output Voltage Range 1.8 3.3 V RON On Resistance 1 Ω Power Supply Rejection Ratio f = 1kHz, CREF = 100nF 70 f = 100kHz, CREF = 100nF 40 IOFF Shut Down Current ENx = Low IVDD Supply Current Without Load 1 Output Voltage Settling Time 1 2 PSRR tset tstart 1 VOUT VLINEREG VLOADREG Start-Up Time Output Voltage Tolerance Line Regulation, Static Load Regulation, Static VIH Enable Input Voltage High VIL Enable Input Voltage Low ILOAD Output Current ILIMIT Output Current Limitation VNoise Output Noise Voltage dB 1 µA 200 µA ILOAD Switched from 0 to 100mA 50 µs CREF = 100nF Pre-charged 300 µs 125 CREF = 0nF Uncharged 300 µs CREF = 100nF Uncharged 15 ms ILOAD = 0mA, TAMB = 25°C -1.5 1.5 % ILOAD = 0 to 200mA -2 2 VDD = 5.5V -1 1 % VDD = 3 to 4.5V -2 2 mV % 1 ILOAD = 0 to 50 mA 0.3 2.5 mV ILOAD = 0 to 200 mA (referenced to 100mA) 0.6 5 mV 0.6 x VDD Thermal Protection 1 1 V 0 10 to 100kHz, CREF = 100nF 1 0.8 V 200 mA 400 mA 40 µVRMS 145 °C Notes: 1. Guaranteed by design and verified by lab evaluation. 2. Startup is performed if any EN pin goes high. www.austriamicrosystems.com Revision 1.21 4 - 10 AS1351 Data Sheet - Ty p i c a l A p p l i c a t i o n 7 Typical Application Figure 3. Typical AS1351_ux Application VDD VOUT1 2.8V VPERI 3V 1µF ±20% (X5R) 2.2µF +100/-50% (Z5U) CMOS Sensor EN1 VOUT2 2.5V VCORE Microprocessor 1µF ±20% (X5R) 2.2µF +100/-50% (Z5U) EN2 GND AS1351_A7 REF GND 100nF (Improved Noise Performance) One-Time Programming Procedure Output Voltages The two LDOs can be programmed and burned to any output voltage between 1.8V and 3.3V in steps of 0.1V. Customers can burn the desired output voltages onsite using the austriamicrosystems programming board. Furthermore, the AS1351 is available in pre-programmed versions with fixed output voltages (see Ordering Information on page 9.) www.austriamicrosystems.com Revision 1.21 5 - 10 AS1351 Data Sheet - Ty p i c a l A p p l i c a t i o n Figure 4. AS1351 Block Diagram VDD VOUT1 Thermal Protection Overcurrent Protection Softstart VREF EN1 Control VOUT2 Thermal Protection Overcurrent Protection Softstart VREF EN2 Control Reference Voltage REF AS1351 GND www.austriamicrosystems.com Revision 1.21 6 - 10 AS1351 Data Sheet - Ty p i c a l A p p l i c a t i o n Package Drawings and Markings The AS1351 is available in a 12-pin QFN 3x3mm package and a wafer bumped package. Figure 5. 12-Pin QFN 3x3mm Package. www.austriamicrosystems.com Revision 1.21 7 - 10 AS1351 Data Sheet - Ty p i c a l A p p l i c a t i o n www.austriamicrosystems.com Revision 1.21 8 - 10 AS1351 Data Sheet - Ordering Information 8 Ordering Information The AS1351 is available with preset LDO output voltages or customer-specific versions (with a minimum order quantity of 30,000). Each customer-specific device is factory trimmed to the desired output voltage (see Table 4). Part Programming Pin Package AS1351 LDO values not programmed 12-pin QFN 3x3 AS1351_A7 VOUT1 = 2.8V, VOUT2 = 2.5V 12-pin QFN 3x3 AS1351_ux Customer-specific LDO values 12-pin QFN 3x3 AS1351_uxF Customer-specific LDO values Bumped Wafer Where: u = Customer-specific VOUT1 value suffix. x = Customer-specific VOUT2 value suffix. Table 4. Output Voltages Suffix Guide Part AS1351_ux Suffix Output Voltage F 3.3 V E 3.2 V D 3.1 V C 3.0 V B 2.9 V A 2.8 V 9 2.7 V 8 2.6 V 7 2.5 V 6 2.4 V 5 2.3 V 4 2.2 V 3 2.1 V 2 2.0 V 1 1.9 V 0 1.8 V www.austriamicrosystems.com Revision 1.21 9 - 10 AS1351 Data Sheet Copyrights Copyright © 1997-2007, austriamicrosystems AG, Schloss Premstaetten, 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. 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 lifesustaining 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 A-8141 Schloss Premstaetten, 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 Revision 1.21 10 - 10