AS1383 200mA, 3.5MHz DC-DC Step-Up Converter General Description The AS1383 is a synchronous, high efficiency DC-DC boost converter running at a constant frequency of 3.5MHz. This very high oscillator frequency allows the usage of a low profile inductor with only 1μH. This results in a very small board space requirement for the complete solutions including all external components. AS1383 generates an output voltage range from 2.7V to 5.0V. In adjustable output voltage variant, the output voltage is selected with an external resistor divider. In fixed output voltage variant the V OUT is pre-programmed in 100mV steps, and the external resistor divider is not needed. AS1383 supports input voltages down to 2.7V. The device provides an output current of 200mA. To support high efficiency across the entire load range the AS1383 is equipped with a synchronous rectifier and features a power save mode for light loads. To avoid harmful deep discharge of the battery during shutdown the AS1383 is equipped with an output disconnect function. The AS1383 is available in a 6-pin WL-CSP package with 0.4mm pitch. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS1383 are listed below: Figure 1: Added Value of Using AS1383 Benefits Features Ideal for single Li-Ion battery powered applications • Wide Input Voltage Range (2.7V to 5.5V) Extended battery life • High Efficiency up to 92% Supports a variety of end applications • Output Voltage Range: 2.7V to 5.0V (fixed and adjustable variants) • 3.5MHz Fixed-Frequency • Output Current up to 200mA • Automatic Powersave Operation for light Loads • Output Disconnect during Shutdown • Anti-Ringing Control minimizes EMI Cost effective, small package • 6-pin WL-CSP with 0.4mm pitch ams Datasheet [v1-01] 2015-May-22 Page 1 Document Feedback AS1383 − General Description Applications The AS1383 is ideal for space critical applications where small size is mandatory as in USB or portable HDMI applications, mobile phones, PDAs, portable media players or digital cameras. Figure 2: AS1383 - Typical Application Diagram – Fixed VOUT Variant VIN = 2.7V – 5.5V CIN 10uF VIN L 1uH SW VOUT AS1383 VOUT = 2.7V – 5.0V FB COUT 4.7uF GND EN Figure 3: AS1383 - Typical Application Diagram – Variable VOUT Variant VIN = 2.7V – 5.5V CIN 10uF L 1uH VIN VOUT SW FB EN Page 2 Document Feedback AS1383 GND VOUT = 2.7V – 5.0V R1 COUT 4.7uF R2 ams Datasheet [v1-01] 2015-May-22 AS1383 − Pin Assignment Pin Assignment Figure 4: Pin Assignment for WL-CSP Pin Assignments: Shows the TOP view pin assignment of the AS1383. A1 A2 B1 B2 C1 C2 Figure 5: Pin Description Pin Number Pin Name Description A1 VIN Input Voltage. The AS1383 gets its start-up bias from VIN unless VOUT exceeds VIN, in which case the bias is derived from VOUT. Thus, once started, operation is completely independent from VIN. Operation is only limited by the output power level and the internal series resistance of the supply. A2 GND Signal and Power Ground B1 SW Switch Pin. Connect an inductor between this pin and VIN. Keep the PCB trace lengths as short and wide as is practical to reduce EMI and voltage overshoot. If the inductor current falls to zero, or pin EN is low, an internal 100Ω anti-ringing switch is connected from this pin to VIN to minimize EMI. (1) B2 VOUT Output Voltage. Bias is derived from VOUT when VOUT exceeds VIN. PCB trace length from VOUT to the output filter capacitor(s) should be as short and wide as is practical. C1 EN Active-High Enable Input. A logic LOW reduces the supply current to < 1μA. Connect to pin VIN for normal operation. C2 FB Feedback Pin. Feedback input to the gm error amplifier, connect this pin to VOUT Note(s) and/or Footnote(s): 1. An optional Schottky diode can be connected between this pin and VOUT. ams Datasheet [v1-01] 2015-May-22 Page 3 Document Feedback AS1383 − Absolute Maximum Ratings Absolute Maximum Ratings Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only. Functional operation of the device at these or any other conditions beyond those indicated under Electrical Characteristics is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability. Figure 6: Absolute Maximum Ratings Symbol Parameter Min Max Units Comments Electrical Parameters VGND ISCR All pins to GND -0.3 VOUT + 0.3 V Input Current (latch-up immunity) -100 100 mA Norm: JEDEC 78 Electrostatic Discharge ESDHBM Electrostatic Discharge HBM ±2 kV Norm: MIL 883 E method 3015 Temperature Ranges and Storage Conditions TAMB Operating Temperature -40 85 °C θJA Thermal Resistance 110 °C/W TJ Junction Temperature 150 °C 125 °C 260 °C 85 % TSTRG Storage Temperature Range TBODY Package Body Temperature RHNC Relative Humidity non-condensing MSL Moisture Sensitivity Level -55 5 1 Norm IPC/JEDEC J-STD-020 (1) Represents an unlimited floor life time Note(s) and/or Footnote(s): 1. The reflow peak soldering temperature (body temperature) is specified according IPC/JEDEC J-STD-020 “Moisture/Reflow Sensitivity Classification for Nonhermetic Solid State Surface Mount Devices” Page 4 Document Feedback ams Datasheet [v1-01] 2015-May-22 AS1383 − Electrical Characteristics Electrical Characteristics All limits are guaranteed. The parameters with min and max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Figure 7: Electrical Characteristics Symbol Max Unit 2.7 5.5 V Output Voltage, Output voltage can be trimmed to any values between Min and Max 2.7 5.0 V VOUT_TOL Output Voltage Tolerance -3 +3 % VO_Ripple Output Ripple Voltage VIN Parameter Input Voltage Note VIN Min Typ Regulation VOUT IOUT = 150mA 20 mVpp 50 100 200 mA Operating Current Output Current VIN ≤ 3.0V 3.0V < VIN ≤ 3.7V VIN > 3.7V IQSHDN Quiescent Current (Shutdown) EN = GND IQPWS Quiescent Current (Powersave operation) IOUT 1.5 uA 25 uA Line transient response VIN = Step from 3.0V to 3.5V, VOUT=5.0V IOUT = 100mA 80 mV Load transient response VIN = 3.6V, VOUT=5.0V IOUT = stepping from 10mA to 100mA 100 mV ams Datasheet [v1-01] 2015-May-22 Page 5 Document Feedback AS1383 − Electrical Characteristics Symbol Parameter Note Min Typ Max Unit 1 uA Switches ILK Leakage current from battery to VOUT EN = GND RONMOS NMOS Switch ON Resistance 0.25 Ω RONPMOS PMOS Switch ON Resistance 0.35 Ω INMOS NMOS Current Limit 650 mA fSW Switching Frequency 3.5 MHz Start-up time Time from active EN to start switching, no load until VOUT is stable 300 us Shutdown VENH EN Input High No load VENL EN Input Low No load EN Input Current Internal pull-down resistor IEN 1.2 V 0.01 0.25 V 1.0 uA Thermal Protection Thermal shutdown Page 6 Document Feedback • 10°C Hysteresis • Thermal protection stops switching, supply disconnect not supported 150 °C ams Datasheet [v1-01] 2015-May-22 AS1383 − Detailed Descriptions The AS1383 can operate from 2.7V to 5.5V and features fixed frequency (3.5MHz) and current mode PWM control for exceptional line- and load regulation. With low RDS(ON) and gate charge internal NMOS and PMOS switches, the device maintains high-efficiency from light to heavy loads. Detailed Descriptions Modern portable devices frequently spend extended time in low-power or standby modes, switching to high power-drain only when certain functions are enabled. The AS1383 is ideal for portable devices since it maintain high-power conversion efficiency over a wide output power range, thus increasing battery life in these types of devices. In addition to high-efficiency at moderate and heavy loads, the AS1383 includes an automatic powersave mode that improves efficiency of the power converter at light loads. The powersave mode is initiated if the output load current falls below a factory programmed threshold. Figure 8: AS1383 Block Diagram L1 1uH SW AS1383 VIN 2.7V to 5.5V VOUT PWM Control CIN 10uF 2.7V – 5.0V 0.35Ω 3.5MHz Ramp Gen erator Slop e Compensation P WM Comp On EN Off COUT 4.7uF 0.25Ω Sync Drive Control Σ Curren t Sen se - FB gm Error A mp Shu tdo wn Control Powersave Shu tdo wn Powersave Ope ration Control RC CC 1.25V Ref CP2 GND ams Datasheet [v1-01] 2015-May-22 Page 7 Document Feedback AS1383 − Detailed Descriptions Low-Noise Fixed-Frequency Operation Oscillator The AS1383 switching frequency is internally fixed at 3.5MHz allowing the use of very small external components. Current Sensing A signal representing the internal NMOS-switch current is summed with the slope compensator. The summed signal is compared to the error amplifier output to provide a peak current control command for the PWM. Peak switch current is limited to approximately 650mA independent of V IN or V OUT. Zero Current Comparator The zero current comparator monitors the inductor current to the output and shuts off the PMOS synchronous rectifier once this current drops to 20mA (approx.). This prevents the inductor current from reversing polarity and results in improved converter efficiency at light loads. Anti-Ringing Control Anti-ringing control circuitry prevents high-frequency ringing on pin SW as the inductor current approaches zero. This is accomplished by damping the resonant circuit formed by the inductor and the capacitance on pin SW (CSW). Powersave Operation In light load conditions, the integrated powersave feature removes power from all circuitry not required to monitor VOUT. When VOUT has dropped approximately 1% from nominal, the device powers up and begins normal PWM operation. C2 recharges, causing the AS1383 to re-enter powersave mode as long as the output load remains below the powersave threshold. The frequency of this intermittent PWM is proportional to load current; i.e., as the load current drops further below the powersave threshold, the AS1383 turns on less frequently. When the load current increases above the powersave threshold, the AS1383 will resume continuous, seamless PWM operation. Shutdown When pin EN is low the AS1383 is switched off and <1μA current is drawn from the battery; when pin EN is high the device is switched on. If EN is driven from a logic-level output, the logic high-level (on) should be referenced to V OUT to avoid intermittently switching the device on. In shutdown the battery input is disconnected from the output. Page 8 Document Feedback ams Datasheet [v1-01] 2015-May-22 AS1383 − Detailed Descriptions Thermal Overload Protection To prevent the AS1383 from short-term misuse the chip includes a thermal overload protection. To block the normal operation the switching of PMOS and NMOS are stopped during the thermal protection, but the V OUT follows the VBAT. The device is in thermal shutdown when the junction temperature exceeds 150°C. To resume the normal operation the temperature has to drop below 140°C. Note(s): Continuing operation in thermal overload conditions may damage the device and is considered bad practice. V OUT Programming with External Resistor Divider In adjustable V OUT variant AS1383 output voltage can be selected with external resistor diver connected to the FB pin as shown in Figure 3. In this case, the VOUT follows the function: (EQ1) R1 V OUT = 1 + ------ ⋅ 1.25V R 2 In fixed output voltage variant the VOUT is programmed internally, and the VOUT if connected directly to FB pin. A higher resistance of R1 and R2 will result in a lower leakage current. Resistance between 10kΩ and 500kΩ is recommended for R2. It is recommended to keep VIN 500mV higher than VOUT. ams Datasheet [v1-01] 2015-May-22 Page 9 Document Feedback AS1383 − Typical Operating Characteristics The following figures are summarizing the AS1383 efficiency as function of load current and input voltage. Typical Operating Characteristics Figure 9: AS1383 Efficiency vs. Load Current 100 95 90 Efficiency (%) 85 80 75 70 65 60 Vin=2.5V, Vout=5.0V, T=25°C 55 Vin=3.5V, Vout=5.0V, T=25°C Vin=4.5V, Vout=5.0V, T=25°C 50 0.0001 0.001 0.01 0.1 1 Output Current (A) Figure 10: AS1383 Efficiency vs. Input Voltage (VOUT = 5.0V, ILOAD=100mA) ϭϬϬ͘ϬϬ ϵϬ͘ϬϬ ĨĨŝĐŝĞŶĐLJй ϴϬ͘ϬϬ ϳϬ͘ϬϬ ϲϬ͘ϬϬ ϱϬ͘ϬϬ ϰϬ͘ϬϬ Ϯ͘ϰϬ Ϯ͘ϵϬ ϯ͘ϰϬ ϯ͘ϵϬ ϰ͘ϰϬ ϰ͘ϵϬ ϱ͘ϰϬ ϱ͘ϵϬ sŝŶs Page 10 Document Feedback ams Datasheet [v1-01] 2015-May-22 AS1383 − Typical Operating Characteristics Figure 11: VOUT Behavior When VIN is Stepped Between 3.0V and 3.5V (ILOAD=100mA, VOUT = 5.0V) Figure 12: VOUT Behavior When VIN is Stepped Between 3.0V and 3.5V (ILOAD=100mA, VOUT = 4.5V) ams Datasheet [v1-01] 2015-May-22 Page 11 Document Feedback AS1383 − External Component Selection An external inductor (L) and two capacitors (C IN and COUT ) are needed for the AS1383 functionality. With the adjustable variant also two external resistors are needed to program the V OUT voltage. This section gives recommendations for the components to be used. External Component Selection Inductor Selection Figure 13: Recommended Inductors Part Number L DCR Current Rating Dimensions in mm (L / W / H) Manufacturer CIG22H1R0MAE 1μH 65mΩ 1.8A 2.5 x 2.0 x 1.0 www.samsungsem.com XFL4020-102 1μH 11.9mΩ 11A 4.3 x 4.3 x 2.1 www.coilcraft.com DFE201610E 1μH 96mΩ 2.2A 2.0 x 1.6 x 1.0 www.toko.co.jp LQM18PW1R0MCH 1μH 288mΩ 0.95A 1.6 x 0.8 x 0.5 www.murata.com Capacitor Selection When choosing ceramic capacitors for C IN and COUT, the X5R or X7R dielectric formulations are recommended. These dielectrics have the best temperature and voltage characteristics for a given value and size. Y5V and Z5U dielectric capacitors, aside from their wide variation in capacitance over temperature, become resistive at high frequencies and therefore should not be used. Note that the last components in the tables are the ones that are used in the evaluation board instead of the smallest possible components. Figure 14: Recommended CIN Capacitors Part Number C TC Code Voltage Rating Dimensions in mm (L / W / H) Manufacturer GRM219R61A106ME47 10μF X5R 10V 2.0 x 1.2 x 1.25 www.murata.com CL10A106KP8NNNC 10μF X5R 10V 1.6 x 0.8 x 0.8mm www.samsungsem.com Page 12 Document Feedback ams Datasheet [v1-01] 2015-May-22 AS1383 − External Component Selection Figure 15: Recommended COUT Capacitors Part Number C TC Code Voltage Rating Dimensions in mm (L/W/H) Manufacturer GRM21BR61E475MA12 4.7μF X5R 25V 2.0 x 1.2 x 1.25 www.murata.com GRM219R61A106ME47 10μF X5R 10V 2.0 x 1.2 x 1.25 www.murata.com CL10A475KP8NNNC 4.7μF X5R 10V 1.6 x 0.8 x 0.8mm www.samsungsem.com CL10A106KP8NNNC 10μF X5R 10V 1.6 x 0.8 x 0.8mm www.samsungsem.com Because ceramic capacitors lose a lot of their initial capacitance at their maximum rated voltage, it is recommended that either a higher input capacity or a capacitance with a higher rated voltage is used. Feedback Resistor Selection Layout Recommendation The high-speed operation of the AS1383 requires proper layout for optimum performance. Figure 16 shows the recommended component layout. • A large ground pin copper area will help to lower the device temperature. • A multi-layer board with a separate ground plane is recommended. • Traces carrying large currents should be direct. • Trace area at pin FB should be as small as is practical. • The lead-length to the battery should be as short as is practical. ams Datasheet [v1-01] 2015-May-22 Page 13 Document Feedback AS1383 − External Component Selection Figure 16: PCB Layout Recommendation Cin 10 uF 1.6mm x 0.8mm VIN GND VIN m m 4 . 3 L 1 uH 2.5mm x 2.0mm GND A1 A2 B1 B2 C1 C2 Cout 4.7 uF 1.6mm x 0.8mm SW EN VOUT R1 B F R2 VIN GND 3.8mm FB Page 14 Document Feedback ams Datasheet [v1-01] 2015-May-22 A S 1 3 8 3 − Pack age Drawings & Markings Package Drawings & Markings Figure 17: 6 Balls WL-CSP with 0.4mm Pitch RoHS Page 15 Document Feedback Green ams Datasheet [v1-01] 2015-May-22 AS1383 − Package Drawings & Mark ings Figure 18: WL-CSP Marking AS1383 Marking: Shows the package marking of the WL-CSP product version. Tracecode (XXXX) is a unique code to identify the part and production lot. Page 16 Document Feedback ams Datasheet [v1-01] 2015-May-22 AS1383 − Ordering & Contact Information Ordering & Contact Information The figure below shows the ordering codes for Tape & Reel deliveries (suffix T in the ordering code). It is also possible to have all the variants on mini reels, when the ordering codes are AS1383-BWLM-xx (where suffix M stands for a mini reel). The components are the same in both reel sizes. Figure 19: Ordering Information Ordering Code VOUT Delivery Form Package AS1383-BWLT-ES - Tape & Reel WL-CSP AS1383-BWLT-AD Adjustable Tape & Reel WL-CSP AS1383-BWLT-45 4.5V Tape & Reel WL-CSP Tape & Reel WL-CSP Tape & Reel WL-CSP AS1383-BWLT-xx AS1383-BWLT-50 5.0V Buy our products or get free samples online at: www.ams.com/ICdirect Technical Support is available at: www.ams.com/Technical-Support Provide feedback about this document at: www.ams.com/Document-Feedback For further information and requests, e-mail us at: [email protected] For sales offices, distributors and representatives, please visit: www.ams.com/contact Headquarters ams AG Tobelbaderstrasse 30 8141 Unterpremstaetten Austria, Europe Tel: +43 (0) 3136 500 0 Website: www.ams.com ams Datasheet [v1-01] 2015-May-22 Page 17 Document Feedback AS1383 − RoHS Compliant & ams Green Statement RoHS Compliant & ams Green Statement RoHS: The term RoHS compliant means that ams AG products fully comply with current RoHS directives. Our semiconductor products do not contain any chemicals for all 6 substance categories, including the requirement that lead not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, RoHS compliant products are suitable for use in specified lead-free processes. ams Green (RoHS compliant and no Sb/Br): ams Green defines that in addition to RoHS compliance, our products are free of Bromine (Br) and Antimony (Sb) based flame retardants (Br or Sb do not exceed 0.1% by weight in homogeneous material). Important Information: The information provided in this statement represents ams AG knowledge and belief as of the date that it is provided. ams AG bases its knowledge and belief on information provided by third parties, and makes no representation or warranty as to the accuracy of such information. Efforts are underway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to provide representative and accurate information but may not have conducted destructive testing or chemical analysis on incoming materials and chemicals. ams AG and ams AG suppliers consider certain information to be proprietary, and thus CAS numbers and other limited information may not be available for release. Page 18 Document Feedback ams Datasheet [v1-01] 2015-May-22 AS1383 − Copyrights & Disclaimer Copyrights & Disclaimer Copyright ams AG, Tobelbader Strasse 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. Devices sold by ams AG are covered by the warranty and patent indemnification provisions appearing in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding the information set forth herein. ams 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 ams AG for current information. This product is intended for use in commercial applications. Applications requiring extended temperature range, unusual environmental requirements, or high reliability applications, such as military, medical life-support or life-sustaining equipment are specifically not recommended without additional processing by ams AG for each application. This product is provided by ams AG “AS IS” and any express or implied warranties, including, but not limited to the implied warranties of merchantability and fitness for a particular purpose are disclaimed. ams 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 ams AG rendering of technical or other services. ams Datasheet [v1-01] 2015-May-22 Page 19 Document Feedback AS1383 − Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) Page 20 Document Feedback Product Status Definition Pre-Development Information in this datasheet is based on product ideas in the planning phase of development. All specifications are design goals without any warranty and are subject to change without notice Pre-Production Information in this datasheet is based on products in the design, validation or qualification phase of development. The performance and parameters shown in this document are preliminary without any warranty and are subject to change without notice Production Information in this datasheet is based on products in ramp-up to full production or full production which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade Discontinued Information in this datasheet is based on products which conform to specifications in accordance with the terms of ams AG standard warranty as given in the General Terms of Trade, but these products have been superseded and should not be used for new designs ams Datasheet [v1-01] 2015-May-22 AS1383 − Revision Information Revision Information Changes from 1-00 (2015-May-06) to current revision 1-01 (2015-May-22) Page Updated Figure 13 12 Updated Figure 19 17 Note(s) and/or Footnote(s): 1. Page and figure numbers for the previous version may differ from page and figure numbers in the current revision. 2. Correction of typographical errors is not explicitly mentioned. ams Datasheet [v1-01] 2015-May-22 Page 21 Document Feedback AS1383 − Content Guide Content Guide Page 22 Document Feedback 1 1 2 General Description Key Benefits & Features Applications 3 4 5 Pin Assignment Absolute Maximum Ratings Electrical Characteristics 7 8 8 8 8 8 8 8 9 9 Detailed Descriptions Low-Noise Fixed-Frequency Operation Oscillator Current Sensing Zero Current Comparator Anti-Ringing Control Powersave Operation Shutdown Thermal Overload Protection VOUT Programming with External Resistor Divider 10 Typical Operating Characteristics 12 12 12 13 13 External Component Selection Inductor Selection Capacitor Selection Feedback Resistor Selection Layout Recommendation 15 17 18 19 20 21 Package Drawings & Markings Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information ams Datasheet [v1-01] 2015-May-22