AS3729B 8A Power Stage General Description The AS3729B is a companion power stage, intended to be used with AS372x products. It cannot be used without a DC/DC controller. It contains the power FETs for 2 phases and is capable to handle output currents of 4A per phase. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3729B, 8A Power Stage are listed below: Figure 1: Added Value of Using AS3729B Benefits Features • Support for single or dual phase operation • 2 phases with separate control input • 2 x 4A output stages are running up to 2.7MHz • Separate power NMOS & PMOS for 4A per phase • Separate coil current feedback per phase • Stand-Alone zero-crossing operation • Over-temperature protection • Integrated temperature monitoring • Cost effective, small package • WL-CSP16: 1.615mm x 1.615mm, 0.4mm pitch Applications This device is a high current dual-phase DC/DC and ideal for: • Mobile phones • Tablets • Notebooks ams Datasheet [v1-03] 2015-Sep-28 Page 1 Document Feedback AS3729B − General Description Block Diagram The functional blocks of this device are shown below: Figure 2: AS3729B Block Diagram VSUP VSUP clk TEMP PWM Logic Pgate PWM Isense CTRL2 ov_curr LX1 CTRL1 CTRL1 1uH 47uF Ngate Zcomp Vov_current ramp S Logic RCSNS Current sense PVSS FB VRef error ota VSS AS3729B Block Diagram: This figure shows the block diagram of the DC/DC controller inside the Main PMIC and the AS3729B Power Stage with all relevant system components. Page 2 Document Feedback ams Datasheet [v1-03] 2015-Sep-28 AS3729B − Pin Assignment Pin Assignment Figure 3: 16 Balls WL-CSP with 0.4mm Pitch Pin Assignments: Shows the top view pin assignment of the AS3729B Pin A1 indicator A1 CTRL1 A2 VSUP A3 LX1 A4 PVSS B1 TEMP B2 VSUP B3 LX1 B4 PVSS C1 AGND C2 VSUP C3 LX2 C4 PVSS D1 CTRL2 D2 VSUP D3 LX2 D4 PVSS Figure 4: Pin Description Pin Number Pin Name A1 CTRL1 Control IO for phase 1 B1 TEMP On/Off control and temperature feedback C1 AGND Analog ground D1 CTRL2 Control IO for phase 2 A2, B2 VSUP Phase 1 positive supply terminal C2, D2 VSUP Phase 2 positive supply terminal A3, B3 LX1 Phase 1 switching output to coil C3, D3 LX2 Phase 2 switching output to coil A4, B4 PVSS Phase 1 negative supply terminal C4, D4 PVSS Phase 2 negative supply terminal ams Datasheet [v1-03] 2015-Sep-28 Description Page 3 Document Feedback AS3729B − 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. Absolute Maximum Ratings Figure 5: Absolute Maximum Ratings Symbol Parameter Min Max Units Comments Electrical Parameters Supply voltage to ground 5V pins -0.5 7.0 V Applicable for pins VSUPx, LXx, CTRLx Supply voltage to ground 3V pins -0.5 5.0 V Applicable for pin TEMP Voltage difference between ground terminals -0.5 0.5 V Applicable for pins PVSS, AGND Input current (latch-up immunity) -100 100 mA Norm: JEDEC JESD78 Continuous Power Dissipation (TA = 70°C) PT Continuous power dissipation 1 W PT (1) for WL-CSP16 package (RTHJA ~ 55K/W) kV Norm: JEDEC JESD22-A114F Electrostatic Discharge ESDHBM Electrostatic discharge HBM Page 4 Document Feedback ±2 ams Datasheet [v1-03] 2015-Sep-28 AS3729B − Absolute Maximum Ratings Symbol Parameter Min Max Units Comments Temperature Ranges and Storage Conditions TA RTHJA TJ Operating temperature -40 85 Junction to ambient thermal resistance °C/W Junction temperature TSTRG Storage temperature range TBODY Package body temperature RHNC Relative humidity (non condensing) MSL Moisture sensitivity level °C -55 5 1 125 °C 125 °C 260 °C 85 % RTHJA typ. 55K/W Norm IPC/JEDEC J-STD-020 (2) Represents an unlimited floor life time Note(s) and/or Footnote(s): 1. Depending on actual PCB layout and PCB used 2. 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” ams Datasheet [v1-03] 2015-Sep-28 Page 5 Document Feedback AS3729B − 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 6: Electrical Characteristics Symbol VIN Parameter Input voltage ILIMIT Peak coil current limit ILOAD Load current single phase Note Min Typ Max Unit Pin VSUPx 2.5 5.5 V Pin CTRLx 0 5.5 V Pin TEMP 0 3.6 V 4.8 A 3 A Single phase Continuous load current 0 4 (1) Peak load current RPMOS P-switch ON resistance (2) Single phase 40 70 mΩ RNMOS N-switch ON resistance (2) Single phase 20 35 mΩ Switching frequency Supplied by DC/DC controller 1.3 3 MHz IQ_force_PWM Quiescent current PWM TEMP pin high, force PWM mode active 6.2 mA IQ_low_power Quiescent current LP TEMP pin high, low power mode active 21 μA Ipower_off Power-Off current No current into pin TEMP ±1 μA Rdischarge Active discharge Single phase 16 Ω fSW Electrical Characteristics: Shows the Electrical Characteristics of the Step Down DC/DC Power Stage. VSUP = 3.8V, TA = 25°C (unless otherwise specified) Note(s) and/or Footnote(s): 1. Maximum value only for pulsed peak current 2. MOS transistor only without package parasitic Page 6 Document Feedback ams Datasheet [v1-03] 2015-Sep-28 AS3729B − Typical Operating Characteristics AS3729B Step Down DC/DC: Shows the Efficiency of AS3729B of various coil types in a 2016 package in dual and combined mode. For the dual mode two 1uH coils are used and for the combined mode one 470nH coil. VSUP = 3.7V, VOUT = 1.2V, 1.35MHz operation, TA = 25°C Figure 7: Efficiency vs. Output Current for 2016 Coil Types 95 90 85 Efficiency (%) Typical Operating Characteristics 80 75 70 AS3729B 3V7-1V2 TFM201610GHM-1R0M dual (1.35MHz) AS3729B 3V7-1V2 CITG201610GM1R0MWE dual (1.35MHz) AS3729B 3V7-1V2 DFE201610P-1R0 dual (1.35MHz) 65 AS3729B 3V7-1V2 TFM201610GHM-R47M combined (1.35MHz) AS3729B 3V7-1V2 CIGT201610HMR47MNE combined (1.35MHz) AS3729B 3V7-1V2 DFE201610P-R47 combined (1.35MHz) 60 0.01 0.1 1 10 Output Current (A) Figure 8: Efficiency vs. Output Current for 2520 Coil Types 95 90 85 Efficiency (%) AS3729B Step Down DC/DC: Shows the Efficiency of AS3729B of various coil types in a 2520 package in dual and combined mode. For the dual mode two 1uH coils are used and for the combined mode one 470nH coil. VSUP = 3.7V, VOUT = 1.2V, 1.35MHz operation, TA = 25°C 80 75 70 AS3729B 3V7-1V2 VLS252010HBX-1R0 dual (1.35MHz) AS3729B 3V7-1V2 DFE252010P-1R0 dual (1.35MHz) 65 AS3729B 3V7-1V2 VLS252010HBX-R47 combined (1.35MHz) AS3729B 3V7-1V2 DFE252010P-R47M combined (1.35MHz) 60 0.01 0.1 1 10 Output Current (A) ams Datasheet [v1-03] 2015-Sep-28 Page 7 Document Feedback AS3729B − Typical Operating Characteristics Figure 9: Efficiency vs. Output Current for Various TDK Coils AS3729B Step Down DC/DC: Shows the Efficiency of AS3729B of various TDK coils in dual and combined mode. VSUP = 3.7V, VOUT = 1.2V, 1.35MHz operation, TA = 25°C 95 90 Efficiency (%) 85 80 75 70 AS3729B 3V7-1V2 TFM201610GHM-1R0M dual (1.35MHz) AS3729B 3V7-1V2 TFM201610GHM-R47M dual (1.35MHz) 65 AS3729B 3V7-1V2 TFM252010GHM-R47M dual (1.35MHz) AS3729B 3V7-1V2 TFM201610GHM-R47M combined (1.35MHz) AS3729B 3V7-1V2 TFM252010GHM-R47M combined (1.35MHz) 60 0.01 0.1 1 10 Output Current (A) Figure 10: Efficiency vs. Output Current for Various Toko Coils AS3729B Step Down DC/DC: Shows the Efficiency of AS3729B of various Toko coils in dual and combined mode. VSUP = 3.7V, VOUT = 1.2V, 1.35MHz operation, TA = 25°C 95 90 Efficiency (%) 85 80 75 70 AS3729B 3V7-1V2 DFE201610P-1R0 dual (1.35MHz) AS3729B 3V7-1V2 DFE252010P-1R0 dual (1.35MHz) AS3729B 3V7-1V2 DFE201610P-R47M dual (1.35MHz) 65 AS3729B 3V7-1V2 DFE252010P-R47M dual (1.35MHz) AS3729B 3V7-1V2 DFE201610P-R47M combined (1.35MHz) AS3729B 3V7-1V2 DFE252010P-R47M combined (1.35MHz) 60 0.01 0.1 1 10 Output Current (A) Page 8 Document Feedback ams Datasheet [v1-03] 2015-Sep-28 AS3729B − Application Information Application Information Figure 11: Typical Application Circuit AS3729B VSUP 10uF DC/DC 0.6 – 1.5V 8A 1.3MHz TEMP_SDx TEMP CTRL1_SDx CTRL1 CTRL2_SDx CTRL2 Vout (0.6-1.5V@8A) DVM, 10mV steps 1uH LX1 47uF PVSS PVSS FB_SDx LX2 FB_SDx 1uH 47uF VSUP 10uF AS3729B Typical Application: This figure shows the connection of the DC/DC controller and the AS3729B Power Stage. External Components Figure 12: Step Down DC/DC Power Stage External Components Symbol Parameter Note Min Typ Max Unit Ceramic X5R or X7R, high performance 64 82 μF Ceramic X5R or X7R, cost optimized 32 47 μF Input Capacitor Ceramic X5R or X7R 6 10 μF Inductor 5A rated, 1.3MHz operation, low RON 0.5 1 μH External Components per Phase CFB CVSUP L Output Capacitor External Components: Shows the recommended values of the needed external components of the Step Down DC/DC Power Stage ams Datasheet [v1-03] 2015-Sep-28 Page 9 Document Feedback AS3729B − PCB Layout PCB Layout Figure 13: Layout Guidelines L1 CIN1 COUT1 CTRL1 TEMP GND 3729B XXXX Vout CTRL2 COUT2 CIN2 L2 FB Layout Guidelines: This figure shows the recommended layout and placement of the external components for the 2-phase AS3729B Power Stage Page 10 Document Feedback ams Datasheet [v1-03] 2015-Sep-28 AS3729B − Package Drawings & Markings Package Drawings & Markings Figure 14: 16-Pin WL-CSP with 0.4mm Pitch RoHS Green Note(s) and/or Footnote(s): 1. Pin 1= A1 2. ccc coplanarity 3. All dimensions in μm ams Datasheet [v1-03] 2015-Sep-28 Page 11 Document Feedback AS3729B − Package Drawings & Markings Figure 15: 16-Pin WL-CPS Marking 3729B XXXX Figure 16: Packaging Code XXXX Tracecode Page 12 Document Feedback ams Datasheet [v1-03] 2015-Sep-28 AS3729B − Ordering & Contact Information Ordering & Contact Information Figure 17: Ordering Information Ordering Code Package Marking Delivery Form 16-pin WL-CSP 3729B Tape & Reel Delivery Quantity AS3729B-BWLM 500 pcs/reel AS3729B-BWLT 12000 pcs/reel 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 [v1-03] 2015-Sep-28 Page 13 Document Feedback AS3729B − 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 14 Document Feedback ams Datasheet [v1-03] 2015-Sep-28 AS3729B − 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 [v1-03] 2015-Sep-28 Page 15 Document Feedback AS3729B − Document Status Document Status Document Status Product Preview Preliminary Datasheet Datasheet Datasheet (discontinued) Page 16 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 [v1-03] 2015-Sep-28 AS3729B − Revision Information Revision Information Changes from 1-01 (2014-Mar) to current revision 1-03 (2015-Sep-28) Page 1-01 (2014-Mar) to 1-02 (2015-Sep-21) Content was updated to the latest ams design Updated Figure 16 12 Updated Figure 17 13 1-02 (2015-Sep-21) to 1-03 (2015-Sep-28) Updated Figure 14 11 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 [v1-03] 2015-Sep-28 Page 17 Document Feedback AS3729B − Content Guide Content Guide Page 18 Document Feedback 1 1 1 2 General Description Key Benefits & Features Applications Block Diagram 3 4 6 7 Pin Assignment Absolute Maximum Ratings Electrical Characteristics Typical Operating Characteristics 9 9 Application Information External Components 10 11 13 14 15 16 17 PCB Layout Package Drawings & Markings Ordering & Contact Information RoHS Compliant & ams Green Statement Copyrights & Disclaimer Document Status Revision Information ams Datasheet [v1-03] 2015-Sep-28