DATASHEET SEARCH SITE | WWW.ALLDATASHEET.COM
Document overview
- Manufacturer or author: Provided By ALLDATASHEET.COM(FREE DATASHEET DOWNLOAD SITE)
- PDF pages: 19
Technical content
[v1-24] 2015-Aug-13 Document Feedback AS3729 5A Power Stage The AS3729 is a companion power stage, intended to be used with AS372x products. It cannot be used without a DCDC controller. It contains the power FETs for 2 phases and is capable to handle output curren ts of 2.5A per phase. Ordering Information and Content Guide appear at end of datasheet. Key Benefits & Features The benefits and features of AS3729, 5A Power Stage are listed below: Figure 1: Added Value of Using AS3729
Applications
The device is a high current dual-phase DCDC and ideal for:
- Mobile phones
- Tablets
- Notebooks Benefits Features Support for single or dual phase operation • 2 phases with separate control input 2 x 2.5A output stages are running on 3MHz
- Separate power NMOS & PMOS for 2.5A per phase
- Separate coil current feedback per phase
- Stand-alone zero-crossing operation Over-temperature protection • Integrated temperature monitoring Cost effective, small package • 16-pin WL-CSP: 1.615mm x 1.615mm, 0.4mm pitch General Description
Document Feedback [v1-24] 2015-Aug-13 Block Diagram The functional blocks of this device for reference are shown below: Figure 2: AS3729 Block Diagram AS3729 Block Diagram: This figure shows the block diagram of the DCDC controller inside the Main PMIC and the AS3729 Power Stage with all relevant system components.
Document Feedback [v1-24] 2015-Aug-13 AS3729 − 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 5: Absolute Maximum Ratings 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 Sensiti vity Classification for Nonhermetic Solid State Surface Mount Devices” . 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) Electrostatic Discharge ESD Electrostatic discharge HBM ±1.5 kV Norm: JEDEC JESD22-A114F Temperature Ranges and Storage Conditions TA Operating temperature -40 85 °C RTHJA Junction to ambient thermal resistance °C/W RTHJA typical 55K/W TJ Junction temperature 125 °C TStrg Storage temperature range -55 125 °C RHNC Relative humidity (non-condensing) 58 5% MSL Moisture sensitivity level 1 Represents an unlimited floor life time Absolute Maximum Ratings
[v1-24] 2015-Aug-13 Document Feedback AS3729 − Electrical Characteristics Typical values are at VSUP = 3.8V, T A = 25°C (unless otherwise specified). All limits are guaranteed. The parameters with Min and Max values are guaranteed with production tests or SQC (Statistical Quality Control) methods. Figure 6: Step Down DCDC Power Stage Parameters Note(s) and/or Footnote(s): 1. Maximum value only for pulsed peak current. 2. MOS transistor only without package parasitics. Symbol Parameter Comments Min Typ Max Units VIN Input voltage Pin VSUPx 2.5 5.5 V Pin CTRLx 0 5.5 V Pin TEMP 0 3.6 V ILIMIT Peak coil current limit Single phase 4 A ILOAD Load current Continuous load current 0 2.5 A Peak load current 3 (1) RPMOS P-switch On resistance (2) Single phase 40 70 mΩ RNMOS N-switch On resistance (2) Single phase 30 50 mΩ fSW Switching frequency Supplied by DCDC controller 2.7 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
Electrical Characteristics
[v1-24] 2015-Aug-13 Document Feedback AS3729 − Parameters Figure 17: 3.7V Efficiency vs. Output Current LQMHPN Frequency Comparison AS3729 Step Down DCDC: Shows the Efficiency of the AS3729 in dual phase mode @ 1.0V with VSUP=3.7V, T A=25°C and Murata LQM2HPN1R0MJH coil. 0,001 0,01 0,1 1 10 Efficiency (%) Output Current (A) 3MHz 3MHz, low noise 1.5MHz 1.5MHz, low noise
Document Feedback [v1-24] 2015-Aug-13 AS3729 − Ordering & Contact Information Figure 22:
Ordering Information
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: ams_sales@ams.com 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 Ordering Code Description Delivery Form Package Delivery Quantity AS3729-BWLT Power stage for multi-phase DCDC Tape & Reel 16-pin WL-CSP 12000 AS3729-BWLM Power stage for multi-phase DCDC Tape & Reel 16-pin WL-CSP 500 Ordering & Contact Information
[v1-24] 2015-Aug-13 Document Feedback AS3729 − 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 specif ied 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 unde rway to better integrate information from third parties. ams AG has taken and continues to take reasonable steps to prov ide 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. RoHS Compliant & ams Green Statement
Document Feedback [v1-24] 2015-Aug-13 AS3729 − 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 appe aring in its General Terms of Trade. ams AG makes no warranty, express, statutory, implied, or by description regarding th e information set forth herein. ams AG reserves the right to ch ange 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 wa rranties, 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 th ird party shall arise or flow out of ams AG rendering of technical or other services. Copyrights & Disclaimer
[v1-24] 2015-Aug-13 Document Feedback AS3729 − Document Status Document Status Product Status Definition Product Preview 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 Preliminary Datasheet 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 Datasheet 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 Datasheet (discontinued) 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 Document Status
Document Feedback [v1-24] 2015-Aug-13 AS3729 − Revision Information Note(s) and/or Footnote(s): 1. Page and figure numbers for the previous version may diff er from page and figure numbers in the current revision. 2. Correction of typographical er rors is not explicitly mentioned. Changes from 1-22 (2013-Aug) to current revision 1-24 (2015-Aug-13) Page 1-22 (2013-Aug) to 1-23 (2015-Aug-11) Content was updated to the latest ams design Updated Figure 5 4 Updated Figure 6 5 Updated Figure 7 6 Updated titles of figures 8, 10, 12, 13 & 17 6 - 11 Updated Figure 18 12 Updated Figure 22 14 1-23 (2015-Aug-11) to 1-24 (2015-Aug-13) Updated Figure 21 13 Revision Information
[v1-24] 2015-Aug-13 Document Feedback AS3729 − Content Guide
1 General Description
1 Key Benefits & Features
1 Applications
2 Block Diagram
3 Pin Assignment
4A b s o l u t e M a x i m u m R a t i n g s